Genus Eriastichus La Salle

Eriastichus cigdemae La Salle 1994: 173-174. Type species Eriastichus cigdemae La Salle.

Diagnosis.

Heavily setose species (Figs 1, 2, 5, 6): head (including eyes), pronotum, mesoscutum, coxae, and lateral parts of propodeum (excl. bare median part - hairy only in E. masneri La Salle) ± covered with fine, short setae; malar sulcus curved; base of scape oblique (e.g., Fig. 45); F1-F4 of male antenna with scattered setae of varying length (Figs 11 - 58), i.e., without a compact whorl of long setae attached close to base - a feature present in many tetrastichine groups; mesoscutellum transverse (Figs 5-6); dorsellum large, flat to slightly convex and smooth (Fig. 5); fore wing with postmarginal vein 0.3-0.7 × as long as the elongate and slender stigmal vein, wing disc strongly setose, including base (i.e., without speculum) and ventral surface of costal cell (Fig. 4), wings ± uniformly but weakly infuscate (Fig. 4) but in a few species hyaline; gaster with pleural membrane between Gt1-4 and Gs1-4 inflated (Figs 1-3, 7, 8); both sexes with a tuft of pale and flattened setae laterally on Gt3-6 (Figs 7-10), though most species with tufts only on Gt6.

Key to males

1Mesoscutellum with parts lateral to submedian grooves strongly setose (Fig. 6)2
-Mesoscutellum with parts lateral to submedian grooves with two or three pairs of strong setae (Fig. 5)3
2Median propodeum hairy (La Salle 1994: fig. 30)E. masneri La Salle (male unknown, this is an anticipated placement; not recorded from Costa Rica)
-Median propodeum bare (as in Fig. 5)E. nakos La Salle (male unknown, this is an anticipated placement; not recorded from Costa Rica)
3Scape 1.3-1.4 × as long as ventral plaque (Fig. 50); lower face yellowish brown (Fig. 59)E. pallidops sp. nov.
-Scape 1.7-8.0 × as long as ventral plaque; colour of lower face variable4
4Scape 5.3-8.0 × as long as ventral plaque5
-Scape 1.7-5.0 × as long as ventral plaque9
5Antenna with dorsobasal setae on F1 0.5 × as long as length of F1 (Fig. 15), pedicel + flagellum 2.0 × as long as width of headE. copalensis sp. nov.
-Antenna with dorsobasal setae on F1 at least 1.1 × as long as length of F1, pedicel + flagellum at most 1.6 × as long as width of head6
6Scape 8.0 × as long as ventral plaque (Fig. 57), and 1.4 × as long as height of eyeE. tonioazofeifai sp. nov.
-Scape at most 6.7 × as long as ventral plaque, and at most 0.9 × as long as height of eye7
7Antennal flagellum longer (Fig. 11), e.g., F1 2.5 ×, F4 2.8 ×, clava 7.3 × as long as wideE. acribis sp. nov.
-Antennal flagellum shorter, F1 1.5-1.7 ×, F4 2.0 ×, clava 4.8-5.2 × as long as wide8
8Setae on flagellomeres more erect, and dorsobasal setae on F1 1.5 × as long as length of F1 (Fig. 12)E. cluridis sp. nov.
-Setae on flagellomeres less erect, and dorsobasal setae on F1 1.1 × as long as length of F1 (Fig. 16)E. coelotis sp. nov.
9Scape 1.3 × as long as height of eye (Fig. 14)E. colenis sp. nov.
-Scape at most 1.0 × as long as height of eye10
10Scape dark brown11
-Scape yellowish brown to pale brown17
11Dorsobasal setae on F1 0.8-1.1 × as long as length of F112
-Dorsobasal setae on F1 0.4-0.6 × as long as length of F114
12Ventral plaque on scape situated medially (Fig. 37)E. johnlasallei sp. nov.
-Ventral plaque on scape situated below the middle (Figs 17, 20)13
13Each flagellomere with few setae, e.g., F1 with six setae, ventral plaque 0.2 × as long as length of scape (Fig. 17)E. daptilis sp. nov.
-Each flagellomere with more setae, e.g., F1 with ca. 15 setae, ventral plaque 0.4 × as long as length of scape (Fig. 20)E. dotaensis sp. nov.
14Flagellomeres longer, F1, F3, F4 each 3.7 ×, F2 4.0 × as long as wide (Fig. 18)E. decoris sp. nov.
-Flagellomeres shorter, F1 2.0-3.5, F2 2.4-3.5, F3 2.1-3.4, F4 2.3-3.4 × as long as wide15
15Fore and mid legs with coxae and femora yellowish brownE. denotatis sp. nov.
-Fore and mid legs with coxae and femora dark brown16
16Ventral plaque 0.5 × as long as length of scape (Fig. 22)E. diadrys sp. nov.
-Ventral plaque 0.3 × as long as length of scape (Fig. 23)E. ebulis sp. nov.
17Dorsobasal setae on F1 ca. 2 × as long as F1E. cigdemae La Salle
-Dorsobasal setae on F1 at most 1.5 × as long as F118
18Dorsobasal setae on F1 at least 1.2 × as long as F1, and setae on flagellomeres erect (Figs 24, 27)19
-Dorsobasal setae on F1 at most 1.0 × as long as F1, setae on flagellomeres variable20
19Antenna shorter (Fig. 24), pedicel + flagellum 1.1 × as long as width of headE. egrestis sp. nov.
-Antenna longer (Fig. 27), pedicel + flagellum 1.6-1.7 × as long as width of headE. eleagnis sp. nov.
20Scape 4.5-5.0 × as long as ventral plaque21
-Scape 1.8-4.2 × as long as ventral plaque24
21Ventral plaque situated medially (Fig. 25)E. ellipsis sp. nov.
-Ventral plaque situated below median part of scape22
22Dorsobasal setae on F1 0.6 × as long as length of F1 (Fig. 40)E. johnnoyesi sp. nov.
-Dorsobasal setae on F1 0.9-1.0 × as long as length of F1 (Figs 28, 31)23
23Antenna with F1-F4 each 3.3-3.5 × as long as wide, setae on flagellomeres less erect (Fig. 31)E. eminis sp. nov.
-Antenna with F1-F4 1.8-2.5 × as long as wide, setae on flagellomeres more erect (Fig. 28)E. facilis sp. nov.
24Scape 1.7-2.0 × as long as ventral plaque25
-Scape 2.2-4.2 × as long as ventral plaque28
25Setae on flagellomeres more erect, scape dark brown (Fig. 29)E. fenestris sp. nov.
-Setae on flagellomeres less erect, scape yellowish brown to pale brown26
26Antenna with F1-F4 each 2.0 × and clava 4.3 × as long as wide (Fig. 21)E. derilis sp. nov.
-Antenna with F1-F4 each 2.7-3.0 × and clava 5.5-6.3 × as long as wide (Figs 13, 30)27
27Flagellomeres with more setae, e.g., F2 with eight setae on dorsal surface (Fig. 13)E. aphritis sp. nov.
-Flagellomeres with less setae, e.g., F2 with four setae on dorsal surface (Fig. 30)E. follis sp. nov.
28Frons and legs yellowish brownE. sannionis sp. nov.
-Frons partly to completely dark brown, legs yellowish brown to dark brown29
29Coxae and femora predominantly to completely dark brown30
-Coxae and femora ± yellowish brown, some coxae or hind femur can be partly dark brown33
30Setae on flagellomeres erect (Figs 34, 58)31
-Setae on flagellomeres less erect than in alternate (Figs 33, 56)32
31Scape narrow at base (Fig. 34)E. galeatis sp. nov.
-Scape wide at base (Fig. 58)E. vestis sp. nov.
32Flagellomeres with few setae, e.g., F2 with three setae on dorsal surface (Fig. 56)E. velaminis sp. nov.
-Flagellomeres with more setae, e.g., F2 with eight setae on dorsal surface (Fig. 33)E. geratis sp. nov.
33Scape 3.5-4.2 × as long as ventral plaque34
-Scape 2.2-3.1 × as long as ventral plaque37
34Dorsobasal setae on F1 0.5-0.6 × as long as F1 (Figs 32, 36)35
-Dorsobasal setae on F1 0.8-1.0 × as long as F1 (Figs 39, 41)36
35Flagellomeres with more setae, e.g., F2 with eight setae on dorsal surface (Fig. 32)E. glanis sp. nov.
-Flagellomeres with fewer setae, e.g., F2 with five setae on dorsal surface (Fig. 36)E. maniatis sp. nov.
36Setae on flagellomeres more erect (Fig. 39)E. neonis sp. nov.
-Setae on flagellomeres less erect (Fig. 41)E. nexilis sp. nov.
37Ventral plaque situated below middle of scape38
-Ventral plaque situated in the middle, or slightly above the middle44
38Scape 2.2-2.5 × as long as ventral plaque39
-Scape 2.8-3.1 × as long as ventral plaque40
39Dorsobasal setae on F1 1.0 × as long as F1 (Fig. 44)E. novalis sp. nov.
-Dorsobasal setae on F1 0.5-0.6 × as long as F1 (Fig. 42)E. oasis sp. nov.
40F2-F4 each 2.3 × as long as wide (Fig. 26)E. drupis sp. nov.
-F2-F4 each at least 3.0 × as long as wide41
41Flagellomeres longer, e.g., F2 3.6-3.8 × as long as wide (Figs 38, 43)42
-Flagellomeres shorter, F2 3.0-3.2 × as long as wide43
42Dorsobasal setae on F1 0.9 × as long as F1 (Fig. 43)E. ononis sp. nov.
-Dorsobasal setae on F1 0.6 × as long as F1 (Fig. 38)E. nebulis sp. nov.
43Dorsobasal setae on F1 0.5 × as long as F1, scape dark brown (Fig. 46)E. parabilis sp. nov.
-Dorsobasal setae on F1 0.9 × as long as F1, scape yellowish brown (Fig. 49)E. orestis sp. nov.
44Dorsobasal setae on F1 0.5 × as long as F1 and pedicel + flagellum 1.9 × as long as width of head45
-Dorsobasal setae on F1 at least 0.6 × as long as F1 and/or pedicel + flagellum at most 1.7 × as long as width of head46
45Setae on flagellomeres more erect (Fig. 47)E. rivalis sp. nov.
-Setae on flagellomeres less erect (Fig. 45)E. nugalis sp. nov.
46Dorsobasal setae on F1 0.4 × as long as F1 (Fig. 35) and pedicel + flagellum 1.7 × as long as width of headE. hilaris sp. nov.
-Dorsobasal setae on F1 0.6-1.0 × as long as F1, if dorsobasal setae on F1 is only 0.6 × as long as F1, then pedicel + flagellum are 1.5 × as long as width of head47
47Antennal flagellum long and slender (Fig. 54), e.g., F4 3.4 × and clava 7.6 × as long as wideE. renodis sp. nov.
-F4 2.2-2.8 × and clava 4.8-6.3 × as long as wide48
48Dorsobasal setae on F1-F4 1.0 × as long as funicular segment it is attached to (Fig. 52)E. scalaris sp. nov.
-Dorsobasal setae on F1-F4 0.6-0.8 × as long as funicular segment it is attached to49
49Antennal flagellum more slender (Fig. 53), e.g., F3 3.0 × and clava 6.3 × as long as wideE. taraxis sp. nov.
-F3 2.3-2.6 × and clava 4.8-5.8 × as long as wide50
50Pedicel + flagellum 1.9 × as long as width of headE. sodalis sp. nov.
-Pedicel + flagellum 1.5-1.7 × as long as width of headE. tendrilis sp. nov.

Species treatments