132 NORTH AMERICAN TIPULIDAE 



Face and front opaque, the latter with a darker median spot. Antennae elon- 

 gate, joints one to four dark yellow, following joints dark yellow, fuscous at 

 base, flagellar joints two to six or seven, deeply emarginate beneath, outer 

 joints nearly cylindroidal; pubescence fine, dense; the basal setae confined 

 almost entirely to the dorsal side. Occiput shining, acutely produced ante- 

 riorly. A large black spot each side of base of neck. 



Thorax. Pronotal scutum and scutellum dark ocherous, opaque. Dorsum 

 highly polished, testaceous; praescut'al stripes ill- defined, those of the scutum 

 distinct, consisting each of a large, dark ferruginous, antero-exterior spot and a 

 somewhat paler, postero-interior stripe. Scutellum and postnotum yellowish. 

 Pleura yellowish, shining, with some scattered, ocherous spots and patches. 

 Halteres yellowish-brown, paler at base, club fuscous at the apex. Legs dull 

 yellow, very slender, densely beset with rather coarse, short hair, the three 

 outer tarsal joints fuscous, metatarsi much longer than the tibiae. Wings 

 strongly tinted yellow, costal cells and margin of vein Cu and Cu 1 more mark- 

 edly yellow, stigma pale brown; costo-apical region somewhat infuscated; veins 

 C, Sc, and R and its branches, shortly and rather closely setulose; veins M 1 - 2 and 3 

 more sparsely setulose, and setulae rather long and fine. Venation as in figure. 



Abdomen testaceous, lustrous ; first tergite with black median stripe, a more 

 or less interrupted lateral stripe and posterior margin of segments black, paler 

 and interrupted on some segments. Venter with a row of black spots. Eighth 

 sternite with rounded emargination, the latter fringed with yellow hair. 

 Ninth tergite light brown, rounded latero-posteriorly with a large, deep, semi- 

 circular impression anteriorly, giving the appearance as though the tergite 

 consisted of two incurved processes, leaving a narrow space between the latter, 

 apically. Outer appendages of hypopygium brownish, basal half lanceolate, 

 apical half very slender, curved ventrad, the inner (?) appendages consist of a 

 pair of blackish, strongly chitinized processes, projecting posteriorly, turned 

 up angularly at the end and ending in an acute spine; an acutely, triangular 

 tooth externally and a spine within near the base; ninth sternite brown, long, 

 with wide median fissure containing a pale yellowish body, pleural suture 

 faint, slightly curved but not curved dorsad anteriorly. 



Female. . Length, 16 mm.; wing, 13 mm. 



Very similar to the male. Antennae relatively short, joints one to five or 

 six fairly stout, folloAving joints very slender, verticels complete. Stripes of 

 mesonotal scutum less distinct. The lateral stripe of the abdomen and the 

 posterior margin of the segments, completely and conspicuously banded with 

 black; the first tergite without median stripe, posterior segments more exten- 

 sively black. Ovipositor dark ferruginous, dorsal valves long and slender, 

 slightly curved downward at the apex; ventral valves slender, three-fourths 

 the length of the upper valves, pointed. 



Hole-type: cf ; Hazleton, Pennsylvania. July 11, 1913. (W. 

 G. Dietz.) 



Allotype: 9 ; topotypic. August 18, 1915. 

 Paratypes: nine females, topotypic, June, July, August. 



