Tomosvaryella crassa Ale-Rocha, n. sp.

Tomosvaryella crassa Ale­Rocha, n. sp.

(Figs. 38–43)

Diagnosis. Wing anal lobe widened. Hind trochanter with rounded ventral process. Hind tarsomeres slender; first hind tarsomere as long as the three following segments together. Surstyli very wide, as long as the epandrium.

Description (ɗ). Body length 3.5 mm; wings 3.3 mm. Eyes contiguous on the frons for about 10 facets; ocellar triangle as long as half of length of the contiguous area of eyes; postcranium black, silvery pruinose; frontal triangle silvery pruinose; antennae brown, anterior margin of flagellum pale yellow. Thorax: scutum and scutellum black, mesopleuron dark brown; postsutural region brown pruinose; presutural and postalar region, scutellum, subscutellum, laterotergite and notopleuron silvery­gray pruinose; mesopleuron sparsely silvery­gray pruinose; setae short, inconspicuous. Wing hyaline; third costal section as long as one third of the fourth; anal lobe widened. Legs dark brown except apex of femora, basal one fourth of the tibiae and ventral surface of the tarsi yellow; tibiae apex and dorsal surface of the tarsi pale brown, first and fifth tarsi slightly darkened; forefemur with an inconspicuous pair of sub­basal spines; hind trochanter (Fig. 38) with rounded ventral process; hind tarsomeres slender, first tarsomere as long as the three following segments together. Abdomen wide, black, brown pruinose dorsally, silvery­gray pruinose laterally on tergites 1, 4 and 5. Syntergoesternite 8 short, narrow, about half of length of tergite 5, setae inconspicuous. Terminalia as in Fig. 39. Surstyli in lateral view as in Figs. 40, 41. Phallic guide and phallus as in Fig. 43. Ejaculatory apodeme as in Fig. 43.

Female unknown.

Material. Holotype ɗ (CAS). Verbatim text of two pin labels: MEXICO: Sonora, Alamos, 5.i.1971, P.H. & M. Arnaud [white paper] / Holotype ɗ, Tomosvaryella crassa Ale­ Rocha [red paper]. Terminalia and left hind leg placed in a microvial with glycerine and pinned along with the specimen.

Paratypes: MEXICO: Sonora, 134 road Km, south Sonoyta, 15.ii.1963, P.H. Arnaud, Jr. (1ɗ CAS); NICARAGUA, Masaya, Masatepe, ii.1995, s/ citrus + Malezas, Projeto NIM (2ɗ INPA, MEL). Type conditions: abdomen and right hindleg of type in tube with glycerine.

Etymology. The specific name refers to the broad surstyli. From Latin crassus, thick.

Remarks. T. crassa can be included in dichotomy 9 of the key of Ale­Rocha and Rafael (1995). The large size and form of the hind trochanter suggest that it is closely related to T. membranacea Ale­Rocha & Rafael and T. mexicanensis Ale­Rocha & Rafael. It differs from both species by the lack of long bristles on the hind femur, short and narrow epandrium, wide, large surstyli and phallic guide without dorsal thorns.