NOUrPI AMERICAN DIPTICRA. 109 



of head and entire body yellow, except the pile on ocellar triangle, antenuse, 

 face, and many on the pleura and coxse, which are black, a dense cluster of 

 snow-white tomentuni on each side of the antennse; bristles of legs black. 

 Wings hyaline, costal cell yellowish. Length 6 uini. 



Louisiana (Morrison). Tliree specimens. 



CiEiMI^AKIA u. geu. 



Body slender, liead much broader than high, eyes contiguous in 

 tlia male, widely se})arated in the female ; antennee longer than the 

 head, first joint as long as the third, not more robust than the second, 

 the latter scarcely longer than broad ; third joint tapering on its 

 apical half, the apex blunt and destitute of a style; proboscis pro- 

 jecting forward, slightly longer than the head and thorax united ; 

 })alpi cylindrical, reaching slightly beyond tip of antennae ; scutellum 

 divided by a deep, longitudinal groove into two hemispheres ; furca- 

 tion of second and third vein occurs before base of discal cell ; first 

 basal cell much longer than the second ; anterior branch of third 

 vein connected with the second by a cross-vein, forming three sub- 

 marginal cells ; second vein before its apex abruptly bent forward 

 nearly at a right angle, marginal cell greatly expanded at its apex ; 

 four posterior cells, all of them open, as is also the anal; costa in 

 the male furnished with small, teeth-like processes ; tibiae bristly, 

 jndvilli present, no enipodia. Type, Lordotus canalis Coq. 



Genii iiaria pelliicidsk u. sp. — Same as canalis, with these exceptions: 

 Eyes destitute of a purplish line, — present in canalis, dividing each eye into two 

 parts (an upper and a lower) of nearly an equal size. Wings with only two 

 brown clouds, situated at bases of first and fourth posterior cell, whereas in can- 

 alis there are at least eight brown spots in each wing. Length 6 mm. 



Southern California. A single male, in May. 



LOKDOTUIS Loew. 

 The North American species are as follows: 



1. — Second antenna! joint nearly twice as long as broad, costa of male beset with 

 teeth-like processes, pile of face and breast wholly wliite or yellowish. .2. 



Second antennal joint scarcely longer than wide 4. 



2. — Wings having the first basal cell and base of the marginal yellowish 3. 



Wings, except in the costal cell, wholly hyaline, abdomen destitute of a 



cross-baud of black pile diversiis Coq. 



'i. — Femora wholly yellow, a cross-band of black pile on the fourth abdominal 



segment zona. Coq. 



Femora partly black gibbiii>i Loew. 



TRANS. AM. ENT. SOC. XXI. MAKCU, 1894. 



