138 NORTH AMERICAN TIPULIDAE 



stripes rather narrow and short, straight. Scutum with a subangulate stripe 

 each side, leaving a pale, parallel median space; extreme outer end of trans- 

 verse suture and spot before alar insertion, black. Scutellum and postnotum 

 concolorous. Pleura with a few indistinct, darker spots and a whitish sheen. 

 Halteres sordid yellowish, club pale fuscous, apex dark brown. Legs long, 

 slender, yellowish, pubescence coarse, black; femora and tibiae lightly infus- 

 cate at the apex, outer tarsal joints fuscous, the metatarsi a little longer than 

 the tibiae. Wings hyaline with yellowish tint, costal cells and border of vein 

 Cu and Cu 1 yellowish. Stigma pale brown, costal region beyond the stigma, 

 lightly infuscate. Veins M 1 ' 2 and 3 - and Cu 1 distinctly setulose. Venation as in 

 figure. 



Abdomen concolorous. A brown dorsal stripe extends from base to seventh 

 tergite, less defined and paler posteriorly; lateral margin of tergum with a 

 row of black spots, large and semi-ovoidal on tergites two to five; venter pale 

 yellowish, each sternite with a small, elongate, black dot; eighth segment, 

 with the exception of apical half of sternite, dark brown, the sternite pro- 

 duced, scarcely emarginate, fringed with long hairs, which form a sort of curved 

 pencil at each apical angle. Hypopygium, except the ninth tergite, yellowish, 

 the latter dark brown, somewhat swollen, rounded latero-posteriorly, deeply 

 impressed in front and behind, emarginate in the middle; from below the 

 margin project two very slender processes; outer appendages lanceolate, atten- 

 uated and curved downward; the inner appendages claw-like, curved down 

 and inward; ninth sternite deeply emarginate; from the anterior part pro- 

 jects an upcurved, claw-like process. 



Holotype: cf ; Wyalusing, Bradford County, Pennsylvania. 

 August 4, 1916. (W. G. Dietz.) 



Paratype: C? ; topotypic. 



Closely allied to and easily confounded with P. brevicornis 

 Doane, from which it differs in the protuberant and scarcely 

 emarginate eighth sternite of the male, and different construction 

 of the hypopygium. The paratypic specimen, has the lateral 

 row of abdominal spots coalescent, thus forming an uninterrupted 

 lateral stripe. 



