344 istii.iiix MUSEUM 01 COMPARATIVE ZOOLOGY. 



femalft genitalia Bhowe above two furcate pi the outer branch ! 



Spines on legs l>t;tck, man} on tibia of front pairs. In the male the • 

 tarsal joint of tin- trout li ry much longer than the second. 



Expanse ' 24; 9 28 mm. 



LlMNEPHILl 8 KKWK OTTI, sp. QOV. 



Type. M. C. Z. 10,872. Hudson's Hay Terr.: Great Slave Lake, 

 1861 (Robeii Kennicott). 



Blackish, vertex and notuin slightly pruinose, abdomen brownish, brisi 

 and hair mostly Mack; antennae and Legs yellowish, spines black, lore 



wings yellowish, most of the apical and posterior parts brown, mottled with 

 pale; the usual oblique median mark, a large spot before, and one beyond the 

 anastomosis, pale; hind wings pale, no beard. Maxillary palpi of male very 

 slender; legs slender, on front pair the basal tarsal joint i- much longer than 

 the second, front tibia spined to base, hind tibia very long and slender, and not 

 -pined on basal half. Ocellar macrochaetae almost between the ocelli, lore 

 wings rather slender, first and fifth apical cells reach but little back of the 

 anastomosis, radius bent slightly at Btigmaj in hind wings the fourth apical 

 cell is about one half as wick" at base as the third apical; discal cell slightly 

 Longer than apical cells. 

 1 ixpanse l ( .) mm. 



LlMNEPHILUS ELONGATUS, sp. now 



TYPE.— M. C. X. 10,S70. Hudson's Bay Terr.: Ft. Resoluton, 

 Great Slave Lake (Robert Kennicott). 



Yellowish; vertex and thorax brown; abdomen more yellowish brown; 

 legs and antennae pale; hair mostly yellowish; spines of legs black; male 

 palpi very long; ocellar bristles back of the ocelli; tibia of front Legs spined 

 to base; legs slender, in male the basal joint of front pair is very much longer 

 than the second joint. Fore wings hyaline, yellowish, with stigma and 

 beyond, and most of posterior part brownish, mottled with pale; large pale 

 spots before and beyond the anastomosis, and the usual oblique thyridial spot; 

 hind wings pale, near tip yellowish, no beard, fourth apical cell at base one- 

 half as wide as the third; in the 1 fore wing the first fork is farther back of the 

 anastomosis than the third fork. In the male the genitalia have very long 

 superior appendages, concave within and toothed near tip; in the female the 

 parts are similar to those of L. sitchensis except that the intermediate central 

 piece, which in />. sitchensis is small and slightly bifid at tip, is here a very 

 large and deeply divided piece reaching to tip of the superior appendages. 



Expanse 25 to '27 mm. 



