146 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



broad front, the middle one smaller than the laterals ; palpi in- 

 curved, 4 jointed, the first joint very small, the second and third 

 subequal, the last one longer than the others taken together ; 

 antennae projecting forward, somewhat compressed, 2+14 joint- 

 ed, the basal joints cnpuliform, the flagellar joints cylindrical; 

 pubescent. Thorax very short, highly arched ; metanotum high, 

 scutellum small ; halteres with elongate knob. Abdomen long 

 and slender : in the male somewhat clavate ; genitalia small 

 (figs. 118, 121), abdomen in the female cylindrical, constricted 

 at the base. 7 segmented. Legs long, tibias with spurs and with 

 lateral setae. Wings elongate oval, not longer than the abdo- 

 men, microscopic hairy. The costa is usually produced beyond 

 the tip of R4+5 and nearly or quite reaches the tip of the wing; 

 subcosta ends free or beyond the small cell Rj, which is usually 

 shorter than wide, and noticeably proximad of the middle of 

 the wing; R^^,-, much curved or undulate, petiole of the media 

 much longer than the R-M crossvein ; the cubitus forks proxi- 

 mad of the fork of the media ; anal vein incomplete (figs. 88-90). 

 Immature stages unknown. 



It seems to me that the characters used to separate Empalia 

 from Polylepta are scarcely sufficient to give these independent 

 generic rank. 



Table of Species. 



a. Subcosta ends free. 



b. Subcostal crossvein stands on the small cell, which is 



about twice as long as wade; Mass. i. fragilis. 



bb. Subcostal crossvein is far proximad of the small cell; 



N. H., Ind. (fig. 90). 2. leptogaster. 



aa. Subcosta ends in the costa. 



b. Subcosta ends more than the length of the R-M cross- 

 vein distad of the small cell ; cubitus forks distad of 

 R2+3 (fig- 88). 3. ohediens n. sp 



bb. Subcosta ends opposite the distal end of the small cell 

 cubitus forks proximad of the R-M crossvein (fig 

 89). 4. nigellus n. sp 



For P. tibialis Coq. see genus Empalia. Walker's species F 

 grisea (5) is not sufficiently well described to place generically 

 I suspect it is the same as Sciophila pallipes Say. 



