taxonID	type	description	language	source
EB52171B1E7EFFEAFEC8FC0EFD70C69C.taxon	description	(Figures 1, 2) Description (Holotype) Male: 0.57 mm. Colour. Head and body largely brown. Lower occiput and stemmaticum darker than the rest of the head (Figure 1 A). Antennae uniformly pale brown. Scutellum and distal side lobes paler than mid-lobe and axillae (Figure 1 B). Legs pale yellow, except coxae and distal tarsal segments, brown. Fore wings slightly infuscate below marginal vein (Figure 1 C). Morphology. Antenna with seven antennomeres (Figure 1 D), the flagellum with five, one fewer than is usual for the genus. Scape three times as long as wide. Flagellomeres F 1 – F 4 approximately equal in length, lengths of F 1 – F 5 in the following ratios: 1: 1.1: 1.1: 1.1: 1.5. F 1 with two basiconic sensilla subapically; F 2 and F 3 with a ventral row of four and two basiconic sensilla respectively (Figure 2; but see below under “ Variation ”); stemmaticum with distinct reticulate sculpture, frons laterally striate (Figure 1 A). Mid-lobe of mesoscutum with four pairs of setae, side lobes with two setae each (Figure 1 B). Scutellar sensilla separated by three times the maximum width of a sensillum (though slightly distorted in holotype). Distance between bases of anterior scutellar setae slightly less than that between posterior pair; anterior setae slightly shorter than posterior pair. Fore wing three times maximum width of wing disc, uniformly setose (no asetose area around stigmal vein). Marginal fringe 0.55 times as long as maximum width of disc. Basal cell with three setae arranged in a row. Submarginal vein with two small setae, situated close to the wing base. Marginal vein anteriorly with seven long setae. Tarsal formula 5 - 5 - 5. Mid-tibial spur as long as the shorter side of the mid-basitarsus (observed in paratype specimen, as holotype has both mid-legs missing). Metasomal terga with the following numbers of setae: T 1, 0; T 2, 1; T 3, 1; T 4, 1; T 5, 1; T 6, 0. T 5 and T 6 with a pair of setae centrally. T 7 with two setae, and with five rows of transverse denticles. Male genitalia as in Figure 1 D. Variation Very little in the limited material examined (n = 10). Some specimens have a seta fewer on the mesoscutal mid-lobe. At least two paratypes have three basiconic sensilla on F 3, and it may be that the third is present but not visible in the holotype. Female Unknown. Distribution Argentina. Host Dalbulus maidis (DeLong and Wolcott) Hemiptera: Cicadellidae. Material examined Holotype male. ARGENTINA: Santiago del Estero, Naranjito 20 – 26 December 2006 (E. Luft Albarracin) ex egg of D. maidis (DeLong and Walcott) (IMLA). Paratypes. Two males, same data as holotype UCRC ENT 75916 (MLPA, UCRC); two males ARGENTINA: Tucumán, El Manantial, (E. Luft Albarracin) ex eggs of D. maidis 24 January to 2 February 2005 (IMLA, UCRC); one male ARGENTINA: Tucumán, El Manantial, (E. Luft Albarracin M ◦ 136) ex eggs of D. maidis 21 – 27 January 2005 (NHM); one male ARGENTINA: Tucumán, El Manantial, (E. Luft Albarracin M ◦ 16) ex eggs of D. maidis 29 December 2005 to 4 January 2006 (NHM); two males ARGENTINA: Tucumán, Los Nogales, 8 – 12 February 2007 (E. Luft Albarracin) ex eggs of Dalbulus maidis (IMLA).	en	Polaszek, Andrew, Albarracin, Erica Luft (2010): Two new Encarsia species (Hymenoptera: Aphelinidae) reared from eggs of Cicadellidae (Hemiptera: Auchenorrhyncha) in Argentina: an unusual new host association. Journal of Natural History 45 (1 - 4): 55-64, DOI: 10.1080/00222933.2010.520169, URL: http://dx.doi.org/10.1080/00222933.2010.520169
EB52171B1E7DFFE7FE9EFC5BFEA8C760.taxon	description	(Figure 3) Description (holotype) Male: 0.75 mm. Colour. Head and body largely brown. Lower occiput and stemmaticum darker than the rest of the head (Figure 3 A). Antennae uniformly pale brown. Scutellum and distal side lobes paler than mid-lobe and axillae (Figure 3 B). Base of metasoma paler than remainder. Legs (except coxae) pale yellow. Fore wings very slightly infuscate below marginal vein. Morphology. Antenna (Figure 3 F) with seven antennomeres, the flagellum with five, one fewer than is usual for the genus. Scape four times as long as wide. F 1 globular, as wide as long. Lengths of F 1 – F 5 in the following ratios: 1: 1.2: 1.4: 1.4: 1.6. F 1 – F 3 with an array of unusual sensory setae, sensilla and possibly glandular structures, as follows: F 1 apically on inner side with several short thick setae, and two basiconic sensilla (Figure 3 E); F 2 on inner side in apical half with a cluster of four basiconic sensilla in a recessed area of the flagellomere (Figure 3 E). Stemmaticum with distinct reticulate sculpture, frons laterally striate. Mandible with socketed peglike structure clearly present (Figure 3 D). Mid-lobe of mesoscutum with three pairs of setae and an additional asymmetrically positioned seta, side lobes with two setae each. Axillar setae placed on the suture beween axilla and posterior side lobe (Figure 3 B). Scutellum distorted in holotype, therefore relative positions of scutellar sensilla and setae unclear. Fore wing three times maximum width of wing disc, uniformly setose (no asetose area around stigmal vein). Marginal fringe 0.54 times as long as maximum width of disc. Basal cell with three setae arranged in a row. Submarginal vein with two small setae, situated close to the wing base. Marginal vein anteriorly with seven long setae. Tarsal formula 5 - 5 - 5. Mid-tibial spur as long as the shorter side of the mid basitarsus. Metasomal terga with the following numbers of setae: T 1, 0; T 2, 1; T 3, 1; T 4, 1; T 5, 1; T 6, 0. T 5 and T 6 with a pair of setae centrally. T 7 with two setae, and with five rows of transverse denticles. Female Unknown. Distribution Argentina. Host Plesiommata mollicella (Fowler) Hemiptera: Cicadellidae. Material examined Holotype male. ARGENTINA: Tucumán, El Manantial, (E. Luft Albarracin M ◦ 8) ex eggs of Plesiommata mollicella 9 – 18 January 2006 (IMLA).	en	Polaszek, Andrew, Albarracin, Erica Luft (2010): Two new Encarsia species (Hymenoptera: Aphelinidae) reared from eggs of Cicadellidae (Hemiptera: Auchenorrhyncha) in Argentina: an unusual new host association. Journal of Natural History 45 (1 - 4): 55-64, DOI: 10.1080/00222933.2010.520169, URL: http://dx.doi.org/10.1080/00222933.2010.520169
EB52171B1E7DFFE7FE9EFC5BFEA8C760.taxon	discussion	Comments Encarsia dalbulae and E. mollicellae are currently known only from male specimens. Male Encarsia are often extremely difficult to identify to species in the absence of conspecific females, and it is possible that both species described here represent previously described species that are known so far from females only. It is extremely unusual for Encarsia males to be reared from insect eggs, a biology known for only two described species, E. boswelli and E. porteri. As stated earlier, E. porteri males are obligate ooparasitoids of a range of Lepidoptera eggs. Given that virtually all female Encarsia lay unfertilized (male) eggs into already parasitized whitefly hosts, laying an egg into a cicadellid egg, situated more deeply in the plant tissue, could require modifications to the ovipositor, particularly its length. It is probable, but by no means certain, that the hosts of the female E. dalbulae and E. mollicellae are whiteflies (Aleyrodidae). Encarsia boswelli develops in eggs of Plataspidae (Heteroptera), with males emerging alongside their female siblings in the same egg mass (Polaszek and Hayat 1990). Biologically and in some morphological aspects, E. dalbulae and E. mollicellae are most similar to E. porteri. The males are certainly similar to males of E. porteri, having flagellomeres F 5 and F 6 fused, which is quite unusual in the genus. Encarsia porteri males differ, however, in several respects: the two components of the fused F 5 and F 6 are clearly discernible in E. porteri (and hence the fused antennomere is much longer than the others) whereas they form a single antennomere in E. dalbulae and E. mollicellae; T 6 and T 7 have four (occasionally more) setae in E. porteri (two in E. dalbulae and E. mollicellae). Myartseva and Evans (2007) established the E. porteri species-group for two species: E. porteri and E. neoporteri. The group is defined morphologically by having a short and broad phallobase, and by the presence of basiconic sensilla distributed along flagellomeres 2 – 5 (i. e. non-apically as in other Encarsia males). The former character does not appear to hold true for the two new species, but basiconic sensilla are present in both species on flagellomeres F 1 – F 3 (Figures 2 A – D, 3 E). Hunter et al. (1996) showed conclusively that E. porteri males develop exclusively in Lepidoptera eggs, but according to Myartseva and Evans (2008) at least one male of the closely related E. neoporteri was reared from Bemisia tabaci (Aleyrodidae). To further confuse the issue, a series of males identified as Encarsia porteri in NHM all bear label data that they have been reared from B. tabaci. It seems probable that there are yet more cryptic species awaiting discovery within this interesting species group. Both the new species described here are provisionally assigned to the E. porteri species group.	en	Polaszek, Andrew, Albarracin, Erica Luft (2010): Two new Encarsia species (Hymenoptera: Aphelinidae) reared from eggs of Cicadellidae (Hemiptera: Auchenorrhyncha) in Argentina: an unusual new host association. Journal of Natural History 45 (1 - 4): 55-64, DOI: 10.1080/00222933.2010.520169, URL: http://dx.doi.org/10.1080/00222933.2010.520169
