ART. 11. FLIES OF THE FAMILY CLUSIIDAE MELANDER AND ARGO. 25 



third fronto-orbital bristles counting from in back, postverticals 

 present, ocellars short, prothoracic vestigial, one or two postsutural 

 dorsocentrals, apical scutellars divergent, preapicals present on all 

 tibiae; crossveins approximate. 



Genotyjye. — -C. transversa Czerny. This genus is unique in the 

 location of the cruciate bristles on the frontal orbits, Czerny orig- 

 inally described the genus under the name Craspedochaeta, but Bezzi 

 called attention that this name had already been used by Macquart 

 in 1851 for a genus of the Anthomyiidae. 



KEY TO THE SPECIES OF CZERNYOLA. 



1. Third and fourth veins convergent; four fronto-orbitals; wings infumated on 



apical half, weaker behind and stronger about crossveins; legs yellow ; mesonotum 



and pleurae marked with black and yellow. (Peru) transversa Czerny. 



Third and fourth veins parallel 2 



2. Four fronto-orbitals; wings hyaline; notum black, pleurae yellow. (Costa 



Rica) claripennis, new species. 



Three fronto-orbitals; infumation of wings extending into basal half; pleurae 

 black 3 



3 . Darker portion of wings divided by a transverse paler band 4 



Wings not marked with central paler fascia .5 



4. Legs yellow, tarsi and middle of hind tibiae brown; head largely pale, male. 



(Peru) basalis Czerny. 



Front coxae, all of anterior femora, apical two-thirds of hind femora and the hind 

 tibiae black, femora not fimbriate; head black, palpi piceous, antennae black- 

 ish at apex, female. (Costa Rica) fascipennis, new species. 



5. Wings brown, more intensive between costa and posterior crossvein; legs yellow, 



hind femora with brown preapical ring; face, mouth parts and antennae, yel- 

 low, occiput, thorax and abdomen black, male. (Formosa) biseta Hendel. 



Wings uniformly infumated except at paler base; legs yellow in male, or mostly 

 black in female, underside of femora setose; face, antennae and palpi yellow, 

 male, or largely dark, female. (Bolivia; Costa Rica) atra Kertesz. 



35. CZERNYOLA ATRA Kertesz. 



(Fig. n.) 



Craspedochaeta atra Kertesz, Ann. Mus. Hung., vol. 1, p. 570 (1903). 



Male. — Front blackish, anterior portion reddish to yellow, face 

 cheeks, mouthparts, and antennae pale yellow, arista evidently pubes- 

 cent, tliree times antennal length; bristles yellow to brown, three 

 fronto-orbitals, vibrissa long and slender, about five uniform buccal 

 hairs. Thorax uniformly black and shining, bristles yellow to brown, 

 two small dorsocentrals placed well back. Abdomen black, lamellae 

 long. Legs, including coxae, pale yellow, the hind femora and tibiae 

 somewhat infuscated at apices, under side of femora with long regular 

 yellow bristles. Wings uniformly infumated except at paler base, 

 sections of costa 4:1.4:1, of fourth vein 1:1:4, of fifth vein 1.2:1; hal- 

 teres whitish. Length 2.5 mm. 



Female. — ^Head, including mouthparts, black, antennae tipped 

 with black, bristles black. Legs with front coxae, anterior femora, 

 20183— 25— Proc.N.M.vol.64 i;i 



