Dilasia sulcicollis (Reuter, 1884) n. comb.

(Fig. 141)

Lasiochilus sulcicollis Reuter, 1884: 19 .

Diagnostic characters: Measurements, see Table IV. Male: Characterized by the following combination of characters: head and pronotum, antennal segment I, apex of segment II, outer margin of cuneus, femora and underside of body reddish-brown; hemelytra dark brown; exocorion and apical fringe on corion, tibiae, basal half of antennal segment II and labium, paler. Flattened dorso-ventrally; antennal segment II slightly longer than length of head, thickened at apex; antennal segments (I:II:III:IV) 1: 2.8: 2.4: 2.4; head prolonged anteriorly from base of antennae; hemelytra smooth, dorsal pilosity medium-sized, sparse; forefemora slightly thickened; foretibiae armed with row of long spines on inner margin, pads large; ostiolar peritreme opening rounded apically, flat; meso- and metasternum not sulcate medially, the latter elongated apically; long, thick copulatory spines on left margin of sternite VI, (Fig. 163); pygophore with aedeagus not showing a processus penniformis (Fig. 164); left paramere elongate, straight, apically subquadrate (Fig. 165). Female: Similar to male in measurements and coloration. Antennal segments (I:II:III:IV) 1: 2.8: 2.5: 1.9.

Distribution: Brazil, Venezuela. (Fig. 144).

Material examined: BRAZIL: ♂ ♀ on bromeliads, Hoboken, N. J., 3-V-1941. USNM ; 1♂ Idem. (slidemounted). MACN ; ♀ ♂ same locality, on Tillandsia, 29-X-1940. USNM ; ♂ Campos de Jordão, Est. São Paulo, 1600m, III-1945, Wygodzinsky leg. MACN ; VENEZUELA: ♂ Tacariguá, Mr., 1-III-1949, M. Villegas, R. café, Asc. # 183931. USNM .

Discussion: This is the sole dorso-ventrally flattened species in Dilasia . This species have also a median sulcus on anterior lobe of pronotum and a typical left paramere, subquadrate apically.