134 NORTH AMERICAN TIPULIDAE 



St emit es one to four, with an ill-defined, fuscous spot, eighth sternite feebly 

 emarginate. Hypopygium yellowish-ferruginous, the ninth tergite short, 

 rounded on the sides, deeply impressed and emarginate in the middle posteri- 

 orly, outer appendages lanceolate, directed dorsad, inner appendages, strongly 

 chitinized, curved upward and fringed with yellowish hairs. 



Female. Length, 17 mm.; wing, 15.5 mm. 



Very similar to the male. Antennae shorter. The anterior margin of the 

 interspaces between the middle and the lateral thoracic stripes, is pale brown; 

 the black coloration of the transverse suture much less in evidence; scutellum 

 and postnotum pale yellow. Metatarsi much longer than the tibiae. Abdom- 

 inal markings less defined, the ninth tergite, except apically, blackish. Oviposi- 

 tor ferruginous — valves broken. 



Holotype: d^; Wyalusing, Bradford County, Pennsylvania. 

 August 3, 1916. (W. G. Dietz.) 



Allotype: 9 ; topotypic. 



Paratypes: two males, topotypic, one male, Floodwood, School- 

 craft County, Michigan, July, 1915, (J. S. Rogers); one female, 

 Ottawa, Canada, July 26, 1912, (Germain Beaulieu). 



A rather isolated form. Its nearest ally is P. xanthostigma 

 Loew, from which it is readily differentiated, by its shorter and 

 more dusky antennae. The wings are hyaline and pubescent 

 with a grayish tint, while the abdomen is dusky yellow with a 

 distinct dorsal stripe. The allotype, has cell M^ sessile in one 

 wing, short-stemmed in the other. The paratype from Michi- 

 gan, has this cell long-stemmed in both wings. The paratype 

 from Canada, has a reddish-brown occipital line. 



Pachyrhina wyalusingensis spec. n. (PI. V, fig. 16; pi. VII, fig. 32.) 



Similar to P. obliterata. Head dark testaceous. Flagellar joints bicolored, 

 blackish at base. Occiput shining. Thoracic stripes dark ferruginous. Abdo- 

 men dark testaceous, lateral margins of tergum and posterior margins of seg- 

 ments, bordered black. 



ISIale. Length, 14 mm.; wing, 12.5 mm. 



Head. Mouthparts fuscous. Palpi dark ferruginous. Frontal prolonga- 

 tion with two dark lines. Three basal joints of anteimae reddish-yellow, fol- 

 lowing joints yellowish-fuscous, basal enlargment blackish; pubescence dense, 

 whitish; segments emarginate beneath. Front opaque with a fuscous dot 

 close to the orbital margin. Occiput shining, with a small fuscous spot at its 

 base. 



. Thorax shining, j^ellow. Pronotal scutum and scutellum tinged with fus- 

 cous. Praescutal stripes as in obliterata, the lateral stripes not curved out- 

 wardly, scutima, scutellum, postnotum and pleura as in obliterata, the trans- 

 verse suture less markedly black in middle portion. Halteres yellowish-fus- 

 cous, club dark fuscous. Legs long and slender, dusky yellowish, femora and 



