Dilasia crassicornis n. sp.

(Fig. 46)

Diagnosis: Characterized by the presence of a prominence beneath the paramere and the long, thick second antennal segment.

Description: Measurements, see Table IV. Male: Dorsal view: General coloration dark brown with extreme base of corion, small spot on inner margin of cuneal fracture, labium and legs paler. Setae dorsally long, suberected. Head: Smooth, prolonged anteriorly from base of antennae; eyes small, interocular space wide (Fig. 60); antennal segment II thick, slightly longer than head. Antennal segments (I:II:III:IV) 1: 3: 2.5: 2.4. Thorax: Pronotum small, with lateral margins almost straight, the anterior margin rounded, posterior margin slightly concave. Anterior lobe smooth, posterior lobe rugose (Fig. 61). Mesosternum and metasternum not sulcate medially, the latter one prolonged posteriorly (Fig. 66). Foretibiae armed with spines (Fig. 62); forefemora unarmed, pads well developed (Fig. 63). Foretrochanters with characteristic spines (Fig. 64). Hemelytra smooth (Fig. 65). Abdomen: Hairs on dorsal surface short and restricted to outer margins. Characteristic copulatory spines on the left margin of sternite VI (Fig. 67). Pygophore (Fig. 68) with characteristic punctures on dorsal central and subapical area (Fig. 70). Genitalia with left paramere elongate, linear, slightly widened subapically and not acute apically (Fig. 71). Small but noticeable prominence beneath the paramere (Fig. 72). Aedeagus armed with two lateral and subapical feather-like structures (Fig. 69). Female: Similar to male in coloration and dimensions.

Distribution: Peru. (Fig. 48)

Material examined: Holotype PERU: ♀ Ucayali, Kirigueti, (at light), VII-2004, J. Williams 83º07’08’’W – 11º38’13’’S. MACN ; Paratypes, ♂ (slide-mounted) and ♀ same data as Holotype MACN; ♂ (slidemounted) same data as Holotype, 24-II.2004. MACN; ♂ Cusco, Nuevo Mundo, Base Pluspetrol, (at light), VII- 2004, J. Williams, 73º08’30’’W – 11º33’02’’S. MACN .

Etymology: The specific name refers to shape of second antennal segment that is thick and slightly longer than head.

Discussion: This species belongs to the D. galateae group (together with D. similis and D. gracilicornis) but can be distinguished from them by the shape of the left paramere with its short, basal “wing” and by the presence of a small prominence beneath the paramere.