240 A. L. MELANDER. 



CLIIVOCERA Meigen. 



Small, slender, almost glabrous species of gray, olivaceous, or 

 piceous color, Antennse three-jointed, short, the third joint oval, 

 with a short, outward-pointing bristle. Proboscis thick, short. 

 Eyes of both sexes separated, not or but little emarginate at the 

 antennae. Thorax elongate, abdomen long and narrow ; hypopy- 

 gium small. Legs long and slender; fore cox8e shorter than the 

 femora. Venation not uniform, the third vein always forked, some- 

 times a cross-vein present in the first submarginal cell ; discal cell 

 sometimes pointed at the tip, sending three veins to the margin, if 

 two, then the first is forked near its base ; anal angle not well 

 developed. 



Mik's division of Clinocera* into ten genera is not followed in 

 this paper, as the characters chosen by him from the European spe- 

 cies do not seem to be sufficiently correlated in the American forms 

 to justify the adoption of certain of his genera. 



Legs including the knees black 2. 



At least the knees reddish 7. 



2. Discal cell very oblique apical ly 3. 



Discal cell moderately broad toward the tip 5. 



3. Second and third veins united by a cross-vein, wings spotted. 



conjuncta Locw. 

 Second and third veins free, wings not spotted, anal vein wanting 4. 



4. Second submarginal cell short siiuplex Loew. 



Second submarginal cell long .lepidtt sp. nov. 



5. Stigma obsolete, discal cell very long and narrow, .doliclieretina sp. nov. 

 Stigma distinct, wings with well-developed spots, discal cell short 6. 



6. Knob of the halteres reddish, second and third veins united by a cross-vein. 



taos sp. oov. 

 Halteres black, only two submarginal cells present. . . lecta sp. nov. 



7. Wings uniformly subfuscous, with no darker spots 8. 



Wings cinereous or hyaline 9. 



8. Thoracic dorsum evenly opaque • . • fusoipeunis Loew. 



Thorax with three intervittal spaces shining, veins undulating. 



lineata Loew. 

 fl. Legs black, only the knees reddish, lower part of the face silvery pollinose. 



biuotata Loew. 



Legs almost altogether testaceous, front black 10. 



10. Wings hyaline inaciilipes Bigot. 



Wings spotted with fuscous -iiiaciilata Loew. 



Cliiiocera simplex Loew. 

 Cent., ii, 49. 



(?) Heliodromia longipes Walker, List., etc., iii, p. 504. 

 Olivaceo-cinereous, opaque. Head black, white pollinose, the frontal vitta and 



Verhandl. d. k. k. zool. hot. Ges., Band xxxi, 1881, p. 320. 



