200 NORTH AMERICAN DIPTERA 



46. Proboscis projecting- strongly beyond the anterior oral margin, the 



labellae long and pointed 47 



Proboscis not or scarcely projecting beyond the oral margin, the 

 labellae short and broad 51 



47. Face bare, the sides above, or the clypeus with hair 49 



Face with hair in the middle at least below 48 



48. Posterior border of the eyes emarginate, the facets bisected by a 



short bare line opposite the emargination 53 



Posterior border of the eyes not emarginate, the eyes without a bare, 

 bisecting line posteriorly (62) *Parabombylius Williston 



49. Anterior crossvein situated beyond the basal third of the discal cell .... 50 

 Anterior crossvein situated at or before the basal fourth of the discal 



cell ( 17 ) Sparnopolius Loew 



50. The anterior branch of the third vein arises only a little before the 



apex of the second vein (31) Sphenoidoptera Williston 



The anterior branch of the third vein originates only a little beyond the 

 apex of the discal cell and far before the apex of the second vein 

 ( 44 ) Eclimus Loew 



51. Ocellar tubercle situated near the middle of the front (32, 56). 



Metacosmus Coquillett 

 Ocellar tubercle situated near the vertex 52 



52. Style of antennae broad and flattened, two segmented, simulating seg- 



ments (43, 47) Desmatomyia Williston 



Style not broad and flattened 53 



53. Posterior border of the eyes at least weakly indented and with a short, 



unfacetted stripe 54 



Posterior border of the eyes not at all indented and without any un- 

 facetted stripe (40, 55) Paracosmus Osten Sacken 



54. Third antennal segment bulbous basally and with a long, almost par- 



allel-sided apical part 55 



Third antennal seg^ment sub-triangular, tapering 57 



55. The second vein arises at an almost right angle beyond the base of the 



discal cell (65) Desmatoneura Williston 



The second vein arises at an acute angle before the base of the discal 

 cell 56 



56. Proboscis strongly projecting beyond the anterior oral margin, the 



labelliB long and narrow; face produced; pulvilli absent (59). 



Epacmus Osten Sacken 

 Proboscis rarely strongly projecting, the labellae broad; face usually 

 receding; pulvilli present if the face projects (58). 



Aphoebantus Loew 



57. Anterior oral margin close to the base of the antennae. 



Anisotamia Macquart 

 Anterior oral margin very far from the antennal base (37, 39). 



Eucessia Coquillett 



Neodiplocampta, new genus 



Proposed for Diplocampta raederi Curraii. The genus differs from 

 Diplocampta Schiner in having the face produced, the third antennal 

 segment rather long and conical, broad al^domen, different wing vena- 

 tion, etc. Anthrax paradoxa Jiennicke also belongs to this genus. 



Painter, 1926. Ent. News, xxxvii. p. 74: Curran. 1930, Amer. Mus. Novit. No. 404, p. 7. 



