Oxysarcodexia jamesi Dodge, 1968

(Figs 157–159)

Oxysarcodexia jamesi Dodge, 1968: 443; Panama, Canal Zone, Barro Colorado Island. Holotype male in UKAL (not examined).

Diagnosis. Male. Length 8.5–9.0 mm. Postocular plate with golden pollinosity. Ocellar bristles well developed. Thorax and abdomen with golden pollinosity. Three well-differentiated post-sutural dorsocentral bristles posteriorly and 1 smaller bristles anteriorly. Apical scutellar bristles present. Legs brownish. T3 with 2 pairs of lateral marginal bristles, T4 with 2 pairs of median marginal and 3 pairs of lateral marginal bristles. ST5 with deep median cleft with margins almost parallel and with pilosity. Cercus straight in lateral view, with expanded obliquely cut apex and dorsal subapical barb. Cercus with bristles ventrally over full length. Cerci with distal third narrower than middle part in posterior view; parallel. Pregonite of equal width from base to apex; unicolorous. Postgonite with expanded base and sudden narrowing at apex; unicolorous. Distiphallus with membranous, smooth ventroapical margin, conical apex, sinuous dorsal outline and notable lateroapical dilation. Vesica symmetrical, with rounded median projection of main branch; distal lobes reduced, with filaments, tapering, partially membranous, with microscopic spines only on ventral surface.

Remarks. The cercus and, to some extent, the apical concavity of the distiphallus of O. jamesi (Fig. 158) are similar to those of O. peculiaris Lopes, 1975c (Fig. 217). However, the vesica in O. jamesi presents slender distal lobes, reduced in comparison to those of O. peculiaris, and microscopic spines only on ventral surface of distal lobes. In O. peculiaris the distal lobes of the vesica are expanded and oblong (anterior and lateral views) and covered with small spines on the ventral surface. Female unknown. See also remarks under O. augusta .

Distribution. NEOTROPICAL. Costa Rica *, Panama, Mexico.

Biology. The holotype was collected above Eciton burchellii (Westwood) army ant raids on Barro Colorado Island (Dodge 1968). Female unknown .

Material examined. [ ♂] Santa Rosa National Park, Guanacaste Prov. COSTA RICA Nov. 1998 300m D. H. Jansen & W. Hallwachs / Oxysarcodexia jamesi Dodge Det. H. S. Lopes [MNRJ] .