1895. PROCEEDINGS OF THE NATIONAL MUSEUM, 397 



Genus EMPIS, Linnaeus. 



As stated oii a i)iecediiiii' page, Enoplempis mira, Bigot, and E. cin- 

 erea, Bigot, both belong to Empis. However, as the name Empis 

 cinerca is preoecui»ied for a European species. Bigot's description of 

 E. cinerca should be canceled. 



Empis gcnicKhita, Kirby, is evidently a synonym of E. luctuosa, Kirby, 



Empis sociahilis, Williston, is described in the Kansas University 

 Quarterly.' 



Empis agasthus, Walker, is too imperfectly described to be admitted 

 in the table given below; it is from Iludsous Bay; is black, the hal teres 

 and legs yellowish, apices of femora, of tibite, and of tarsi blackish^ 

 the wings colorless; length, 3 ram. 



AXALYTICAI. KEY TO THE SI'ECIES OF EMPIS, 



1. Thorax, including the pleura, wholly black Iff 



Thorax, or at least the pleura, and also the femora, largely or wholly yel- 

 lowish 2 



2. Knob of halteres yellowish 3 



Knob of halteres blackish, head black, thorax with a medio-dorsal black 



vitta h'ptogastra. 



3. Thorax yellowish, marked with four or five blackish vitt;e 4 



Thorax not vittate, or with a medio-dorsal vitta, or the entire dorsum gray- 

 ish black 8 



4. Head grayish black 5 



Head and abdomen yellow ; hind femora black vittate, and in the male fur- 

 nished with teeth-like processes on the under side near the apex ; hind 

 tibi;e furnished with similar processes near the base mira. 



5. Abdomen, except sometimes at apex, wholly black, coxte black (> 



Abdomen yellow, base of each segment blackish, coxa- yellow, femora not 



vittate, hind femora and tibia' of male simple sordida, 



6. Front and middle femora black vittate, antenufe yelloAv except at tip, pro- 



boscis as long as the thorax eudamides. 



Front and middle femora destitute of black vittiTj 7 



7. Proboscis shorter than the body, antennse wholly black, dorsum of thorax 



never grayish, wings brownish olliiis. 



Proboscis nearly as loug as the body, first two joints of antennii? yellowish, 



dorsum of thorax grayish, wings hyaline abcirus. 



8. Head yellowish 9 



Head blackish 12 



9. Abdomen yellowish, unmarked 10 



Abdomen blackish, sides and hind margin of each segment yellow, eyes of 



male separated, hind legs furnished with teeth-like processes armipes. 



10. First two joints of antenna' yellow; length, 4 mm 14 



First two joints of antennae black; length, 6 mm colon ica. 



11. Anterior branch of third vein connected with the second by a cross vein, all 



cross veins bordered with brown pocciloptera. 



Anterior branch not connected with the second vein, cross veins not bor- 

 dered pallida. 



iVol. II, p. 76 (1893). 



