Physotarsus bonillai Gauld, 1997

Zhaurova, Kira & Wharton, Robert, 2009, A revision of Physotarsus Townes (Hymenoptera: Ichneumonidae: Ctenopelmatinae), with description of 18 new species, Zootaxa 2207, pp. 1-52 : 13-15

Physotarsus bonillai Gauld, 1997 ( Figs 13, 14 )

Physotarsus bonillai Gauld, 1997: 195 –196. Holotype Ψ in INBio. Physotarsus bonillai: Yu & Horstmann, 1997: 455 (catalog).

Diagnosis. Lateral ocelli separated by 0.7–0.8X their widest diameter from each other and about 1.8–2.0X their widest diameter from eye margin. Antennae with 26–27 flagellomeres. Pronotum and mesoscutum glabrous, impunctate. T1 about 1.5X as long as broad. Head entirely pale yellowish. Mesosoma and metasoma yellowish. Hind legs pale orange, with tarsomeres uniformly infuscate. Fore wing hyaline, apex infumate.

This species is most similar to P. claviger and P. castilloi in body sculpture and form of the clypeal margin. The head and body of P. bonillai are completely pale whereas P. castilloi has darker markings on the head and P. claviger has extensive dark markings on head and body. The petiole is also much broader in P. bonillai .

Description. Female: Body ( Fig. 13 ) 4.3–5.0 mm, fore wing 3.5–5.0 mm. Head ( Fig. 14 ): Clypeal margin widely truncate laterally, with thick, somewhat angulate central lobe. Clypeus about 3.8X as wide as long, divided medially by shallow transverse depression. Face covered with short setae; setae longer, less dense on clypeus. Anterior tentorial pits elongate and upcurved laterally. Malar space 0.5–0.6X width of mandibular base. Face 1.8X as broad as long, weakly convex, nearly flat, evenly sparsely punctate. Interantennal area flat, area immediately behind antennae weakly concave laterally, turning convex before reaching ocelli. Anterior margin of torulus situated at about 0.7 of eye height. Interantennal distance greater than distance between lateral ocelli. Widest diameter of torulus 1.2X widest diameter of median ocellus. Lateral ocelli separated by 0.7–0.8X their widest diameter from each other and about 1.8-2.0X their widest diameter from eye margin. Area between lateral ocelli flat, area behind ocelli sharply declivitous. Antennae with 26–27 flagellomeres, first flagellomere 3.9–4.7X longer than wide, 1.1X widest transverse diameter of eye, second flagellomere 0.6–0.7X length of first. Occipital carina present on ventral 0.2–0.3 of head. Mesosoma: Anterior margin of pronotum medially slightly emarginate, laterally rounded and upcurved. Lateral groove of pronotum unsculptured, present on dorsal 0.4. Pronotum and mesoscutum glabrous, impunctate. Epicnemial carina parallels anterior margin of mesopleuron. Mesopleuron impunctate, sparsely pubescent ventrally. Metapleuron pubescent, more sparsely so posteromedially. Propodeum with vestige of pleural carina; impunctate medially, pubescent laterally. Tarsal claws basally usually with stout setae. Fore wing stigma narrow, about 4.8–4.9X longer than wide; Rs+2r arising from basal 0.4 of stigma; marginal cell about 2.6– 2.8X longer than wide; 2rs-m 1.6–2.2X longer than abscissa of M between 2rs-m and 2m-cu; Cu1a about 0.4– 0.6X length of 2cu-a; cu-a weakly to distinctly antefurcal relative to Rs&M. Hind wing M+Cu strongly bowed; basal abscissa of Rs 1.2–1.4X longer than rs-m; 1st abscissa of Cu1 1.5–2.0X longer than cu-a. Metasoma: T1 about 1.5X as long as broad; surface in profile almost completely flat; dorsal tendon attached to almost flat surface; spiracles protruding in profile; dorsolateral carina extending about 0.3–0.4X distance to spiracle. Cerci distinct, round to slightly ovate, nearly flat.

Male: Subgenital plate with narrow, V-shaped incision in posterior margin. Otherwise similar to female in structure and color.

Color. Head entirely pale yellowish; antenna with scape and pedicel ventrally yellow, infuscate dorsally. Flagellum proximally yellowish brown, darker dorsally, grading to entirely black apically. Mesosoma and metasoma pale yellowish. Fore and mid legs yellowish, hind legs orange, with tarsomeres uniformly infuscate. Fore wing hyaline, apex infumate; stigma black.

Material Examined. Paratypes: 2 Ψ COSTA RICA, Guanacaste Prov., Santa Rosa National Park, 3 & 14.xii.1977 (Janzen) ( AEIC); 4 Ψ 1 ɗ, same locality, 3–24.viii.1985 & 6–27.ix.1986 (Janzen & Gauld) ( BMNH, INBio).

Remarks. As with P. adriani , P. bonillai has been collected almost exclusively in the seasonally dry forests of northwestern Guanacaste ( Gauld 1997). Most specimens were collected during the wet season, from June through October, but two specimens (noted above) were taken in December.

Gauld (1997) based his description on the above material plus five additional females, one of which was taken in San Jose Province.

Figures

FIGURES 13 – 16. Habitus and face. 13 – 14, Physotarsus bonillai; 13, habitus; 14, face. 15 – 16, P. castilloi; 15, habitus; 16, face.