148 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



ent Stripes ; pleura, metanotum and scutellum brown ; humeri, 

 base of scutellum and upper margin of the pleura, yellow, hairs 

 pale. Tergites each with dark brown margin posteriorly which 

 is produced forward on the middle line covering over half of 

 the segment, the whole of the first and the last two mainly, 

 brown. Venter, and anterior part of each tergite mainly yel- 

 low, hairs pale; hypopygium as figured (fig. ii8). Coxse and 

 legs together with the hairs yellow, setse of tibiae and tarsi black, 

 the longest of the tibial setse not longer than the diameter of 

 the tibia; trochanters margined with black; (fore legs broken 

 in specimens) ; proximal fourth of middle tibia distinctly swol- 

 len ; empodium not prominent ; tarsal claws each with a basal 

 tooth. Wings (fig. 88) hyaline, anterior veins brownish, pos- 

 terior veins yellow, costa produced the length of the R-M cross- 

 vein beyond the tip of J^^^.^ but does not quite reach the tip of 

 the wing; the subcosta is produced more than twice the length 

 of the R-M crossvein beyond the distal end of the small cell 

 R^ ; the subcostal crossvein is placed beyond the middle of this 

 cell; Rj is nearly straight, R4+5 with a strong sigmal curve; 

 Mj about i^ times as long as the petiole of the media; cubitus 

 forks a little distad of the middle of the petiole of the media ; 

 anal vein not strong, incomplete ; halteres yellow. One male 

 specimen from Pine Lake, Wisconsin, collected by Prof. W. M. 

 Wheeler, in June; and another from Bedford, Mass. 



Female. Like the male but the base of the middle tibia is 

 not swollen; the first and second palpal joints are but little 

 longer than wide ; the third and fourth subequal, about four 

 times as long as wide, produced part of costa not quite as long 

 as the R-M crossvein ; fore metartarsus is i 1-6 times as long as 

 the tibia. 



One female specimen from Hampton, N. H., collected by 

 Mr. S. A. Shaw. This species differs from the European undu- 

 lata in having a dull mesothorax. 



4. Polylepta nigcllus n. sp. 

 Male. Length 6 mm. Head black, subshining, second an- 

 tennal joint yellow, remaining joints fuscous, proboscis and 

 palpi subfuscous ; antennae longer than the thorax, third joint 

 over twice as long as broad. Thorax and abdomen wholly sub- 

 shining black, except the humeri which are narrowly yellow ; 

 setae black ; some of the hairs of abdomen subfuscous. Hypo- 



