SPONGILLA-FLIES — PARFIN AND GURNEY 



467 



(Raleigh) and Pennsylvania, and by Spencer (1942, p. 26) from 

 Agassiz, British Columbia. Records for vicaria from localities from 

 which specimens of fuscata have been examined include those by 

 Banks (1905, p. 25) from Detroit, Mich., and by Carpenter (loc. cit.) 

 from Kaslo, British Columbia; Go Home Bay, Ontario; and Detroit, 

 Mich. 



S. vicaria is readily distinguished from both fuscata and apicalis 

 (with which it has been confused in North America) by the genitalia, 

 larger size, color, and the usual position of the R2 terminal fork basad 



Figure 14. — Terminal abdominal segments of Sisyra vicaria (Walker). A, male, lateral 

 view; B, same, dorsal view; C, female, lateral view. Abbreviations: pa, paremeres; S, 

 sternite; Sa, anterior plate of sternite; Sb, claspers; T, tergite. 



of the level of junction of Sc and Rl (in over 95 percent of specimens 

 examined) in the forewing. It is also separated irom fuscata through 

 the more asymmetrical apex of the forewing, and from apicalis by 

 the comparative lack of longitudinal intervenational streaking and 

 the possession of 3d r in the forewing and 2d r in the hindwing. 



