440 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 4». 



female antennse oval not elongate, clypeus slightly produced in male 

 very much in female, palpi large, male proboscis small, retracted, 

 female proboscis large and fleshy, female ovipositor retracted, male 

 hypopygium retracted, anal protuberance very conspicuous; wings 

 large, third vein forked, mediastinal vein absent, seventh vein incom- 

 plete in female, traceable to near margin of wing in male, legs as in 

 Aphiochseta, with apical spurs well developed on four posterior tibia. 

 Type of the Genus. — Pseudohypocera clypeata, new species. 



PSEUDOHYPOCERA CLYPEATA. new species. 

 Plate 35, figs. 10-12. 



Male and female. — ^Black; frons glossy black, the bristles rather 

 weak, frontal suture indistinct in male, present in female only as a 

 circular depression behind the post-antennal bristles, ocellar triangle 

 small, antennae yellow, third joint darkened at apex, rather pointed 

 in male, arista bare, palpi large in both sexes and strongly bristled, 

 clypeus very much produced in female, chitinous, yellow, with a 

 transverse depression above, proboscis in female large, sUghtly 

 bristly; thorax brownish black, humeri and pleurae yellowish, about 

 8 bristles on the posterior margin of thorax besides the dorso-central 

 pair and one pair beyond them forming a continuous row to the pre- 

 scutellar pair, scutellum very short and broad, at least four times as 

 broad as long, four strong bristles present, second segment of abdo- 

 men lengthened, hypopygium of male very inconspicuous, anal pro- 

 tuberance yellow, sixth segment in female with numerous hair-like 

 bristles; wings clear, thick veins yellow or brownish, costa to middle 

 of wing, first division equal to the remainder, humeral vein bent, 

 fork of third vein^ indistinct, fourth vein leaving third vein with a 

 curve and running in a gentle sweep to very near to wing tip, fifth 

 vein nearly straight, ending much behind wing tip, seventh vein very 

 indistinct, not reaching the wing margin in female but in male trace- 

 able to margin, legs yellow, anterior tibiae with numerous hairs and 

 a row of setulse on the antero- and postero-dorsal surfaces, all femora 

 distinctly hairy especially on the ventral surfaces, hind tibia with a 

 distinct dorsal ridge, setulae on postero-dorsal surface hair-like, hind 

 metatarsus with about 10 transverse rows of stiff hair-like bristles; 

 halteres yeUow. 



Length, 3^-4^ mm. 



Type.— Csit. No. 14833, U.S.N.M. 



Eighteen specimens, Tabasco, Mexico. Manuscript label "on honey 

 and wax," but no date or collector's name. 



A very distinct species not referable to any genus already described. 

 Has much the general appearance of a Hypocera but differs from 

 the species in that genus by having no tibial subapical spines, and 

 the third vein being forked. 



