March, 1898.] COQUILLETT ! DESCRIPTIONS OF OSCINID/E. 45 



Hippelates. Elachiptera is the older name for Crassiseta, as Mosillus 

 is of Gymnopa. The last named genus is not mentioned in Williston's 

 recent manual. One European genus, Eurina, is now for the first time 

 reported from this country, and a new genus, Ceratobarys, is erected 

 for the Hippelates eulophus of Loew. The genus Sigalcessa of Loew, 

 although placed by its author in the Asteidae, and by Dr. Williston in 

 the Drosophilidse, may with propriety be admitted into the present 

 family, from which it does not differ in any more important character 

 than the shortened second longitudinal vein. 



The genus Elllponeura is unknown to the writer in nature ; all of 

 the other genera reported from this country are represented in the 

 National Museum collection. 



Table of Getiera. 



1. Costal vein terminating at the tip of the third vein 2 



Costal vein continued to the fourth vein 6 



2. Hind crossvein present 3 



Hind crossvein wanting Elliponeura. 



3. Posterior femora not thickened 4 



Posterior femora unusually thick Meromy za. 



4. Front projecting in front of the eyes at least two-thirds the length of their hori- 



zontal diameter 5 



Front not projecing more than one-half of the diameter of the eyes..ChIorops. 



5. Third joint of antennae at least twice as long as wide Ectecephala. 



Third joint only slightly longer than wide Eurina . 



6. Hind tibiae each bearing a stout curved spur at tip of inner side 7 



Hied tibice destitute of such spurs .... 8 



7. Antennal arista unusually broad Ceratobarys. 



Antennal arista slender Hippelates. 



8. Tip of second vein less than the length of the hind crossvein beyond the first. 



Sigaloessa. 



Tip of second vein several times the length of the hind crossvein beyond the 



first 9 



9. Arista of antennas not broadened 10 



Arista unusually broadened Elachiptera. 



10. Last section of fourth vein three or more times as long as the penultimate sec- 



tion 11 



Last section less than twice as long as the penultimate section Mosillus. 



11. Antennal arista bare or pubescent 12 



Antennal arista short plumose Qaurax. 



12. Epistoma noticeably produced forward Siphonel la. 



Epistoma not produced forward Oscinis. 



Descriptions of New Species. 

 Eurinaexilis, sp. nov. 



Head jellow, the frontal triangle, antennae, thickened base of the arista, the 

 clypeus and occiput, except the sides and lower part of the latter, black; frontal 



