March, 1898.] CoQUILLETT : DESCRIPTIONS OF OsCINIDyE. 
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 Sigaloessa of Loew, 
although placed by its author in the Asteidae, and by Dr. Williston in 
the Drosophilidae, 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 Elliponeura 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 Genera. 
1. Costal vein terminating at the tip of the third vein. 2 
Costal vein continued to the fourth vein. 5 
2. Hind crossvein present. 
Hind crossvein wanting.Elliponeura. 
3. Posterior femora not thickened ... 
, .*. 4 
Posterior femora unusually thick. Meromyza. 
4. Front projecting in front of the eyes at least two-thirds the length of their hori¬ 
zontal diameter. 
Front not projecting more than one-half of the diameter of the eyes. .Chlorops. 
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 
Hitd tibiae destitute of such spurs. g 
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 antennae not broadened. IO 
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. I2 
Antennal arista short plumose. Gaurax 
12. Epistoma noticeably produced forward.Siphonella 
Epistoma not produced forward. Oscinis 
Descriptions of New Species. 
Eurinaexilis, sp. nov. 
Head yellow, the frontal triangle, antennae, thickened base of the arista, the 
clypeus and occiput, except the sides and lower part of the latter, black; frontal 
