86 ENTOMOLOGICAL SOCIETY 



to H. pacificus. It differs from the latter in being of smaller 

 size, and in having narrower and differently shaped wings, larger 

 and more distinct pterostigma and larger spots along radius and 

 cubitus. 



Hemerobius kokaneeanus, n. sp. 



Alar expanse 14 mm. Body above and below obscure fuscous or pice- 

 ous; the basal half of antennae, posterior lateral angles of pronotum, a 

 small spot in center of mesonotum, and the legs mostly, pale. Anterior 

 wings rather narrow their width less than two-fifths of their length 

 their tips narrowly rounded, hind margin flattened apically, the basal half 

 of costal area very narrow; hyaline, tinged with smoky and marked with 

 fuscous ; veins pale, with scattered brown spots principally where crossed 

 by the wing markings; these wing markings comprise an irregular, more 

 or less interrupted band on each gradate series, a large spot on subptero- 

 stigmal radial cross vein, some spots at fork of median and along cubitus, 

 hind margin (with the exception of a few pale interruptions), and series 

 of smaller spots on the longitudinal veins between radius and hind mar 

 gin; pterostigma indistinct; a pale longitudinal line bisects costal space 

 through the bases of intercostal forks ; posterior fork of median strongly 

 bent toward cubitus, making the inner veinlet connecting with cubitus 

 much shorter than the outer; radio-median cross vein situated at least as 

 far before the forking of median as the former is long, and joining radius 

 much before origin of first sector; forking of median plainly before origin 

 of first sector; three radial sectors, anterior branch of the third forked as 

 far out as, or beyond, inner gradate series (as far out as inner series in 

 left wing, and beyond inner series in right wing, in the type specimen) 

 and beyond subpterostigmal radial cross vein, posterior branch simple; 

 five gradate veins in inner series, the last before the next to the last, six 

 or seven in outer series (six in right wing, seven in left, in the type speci 

 men). Posterior wings hyaline, with a faint smoky tinge, most of the 

 veins dark, the longitudinals pale at base ; first fork of radial sector plainly 

 before forking of median. 



Kokanee Mountain, altitude 9,000 feet, 10 August, collected 

 upon snow on glacier : one specimen. 



Type. No. 7897, U. S. National Museum. 



The venation of this species seems to place it with H. pacifi 

 cus, H. castanece and H. dyari, except that in these latter three 

 the anterior branch of the third radial sector is forked before the 

 inner gradate series and subpterostigmal radial cross vein, while 

 in H. kokaneeanus it is forked as far out as, or beyond, inner 

 gradate series and beyond the subpterostigmal radial cross vein. 

 The wholly dark thorax and the darker and more closely approxi 

 mated wing markings, however, readily distinguish it from any 

 of the species just mentioned. 



