E. T. CRESSON, JR. 35 



Structurally similar to Neurockna anilis. Frons broader than long; an- 

 terior portion not overhanging, but projecting beyond orbits in profile, one 

 reclinate frontal bristle. Face with epistoma not as prominent as frontal 

 margin; foveae shallow. Cheeks nearly as broad as eyes; setulose below; 

 the three post-buccal bristles weak or pale. Antennae subpendent; third 

 joint twice as long as broad, rounded apically; arista coarsely pubescent or 

 shortly plumose. Mesonotum with two post-alars, two supra-alars. There 

 are one or two propleurals, and the sternopleurals are black, hair-Uke. Wings 

 with first vein bare, ending beyond small cross-vein; anal cell twice as long 

 as second basal, with truncate apex. Length. — 8 mm. 



9 . Similar but the pile shorter, especially on the femora, where it is 

 mostly black and bristle-like on the fore pair. Sternopleural bristles stronger. 

 Middle tibial bristles weak or wanting. 



Tijpe.— d'; Ithaca, New York, July 21, 1887, (L. F. Psotta), 

 [Cornell University]. 



Specimens Examined. — 26 cf , 24 9 . 



Canada: Carbonate, Columbia River, British Columbia, July 7 to 12, 

 (J. C. Bradley), [Cornell]. 



New York: Ithaca, June 9 to September 18, [Cornell]. 



Sul)family Sciomyzinae 



Hendel characterized this group as having the prothoracic 

 bristle present, while the median frontal channel is usually want- 

 ing. We may continue to use this characterization with propriety 

 and also add several others which seem to be associated, especially 

 as regards the genera here treated. The second antennal joint 

 is short, triangular, and the femoral bristles well developed. 



The subfamily is a group which will likely give the students 

 more trouble than the others, as the status of the included genera 

 is not very well understood, and many of the latter are possibly 

 peripheral in regards to the limits of the Sciomyzidae, as it is 

 generally recognized in the next subfamily. The typical genus 

 is Melina {Sciomyza of authors), but as Sciomyza is still included 

 it is proper that the name be retained for the subfamily. Two 

 tribes are here suggested, and may at present be recognized by 

 the facial and antennal structure. 



Tribe Oidematopsini 



The new Oidematops, apparently a Sciomyzid genus, does not 

 fall within the limits of any other group considered in this paper, 

 but, as it has most of the characters of the Sciomyzinae, it seems 



TRANS. AM. ENT. SOC, XLVI. 



