OF WASHINGTON. 87 



Hemerobius caudelli, n. sp. 



Alar expanse 13.2 mm. Body above and below obscure fuscous or pice- 

 ous ; the basal half, or more, of antennae, the vertex, hind portion of pro- 

 notum medially and its posterior lateral angles, meso- and metanotum 

 medially, and the legs, pale. Anterior wings rather broad their width 

 two-fifths of their length their tips and hind margin rounded, basal half 

 of costal area rather broad; hyaline, marked with dark and pale fuscous; 

 veins pale, with fuscous interruptions principally where crossed by the 

 wing markings ; these wing markings consist of an irregular, more or less 

 interrupted band on each gradate series, numerous shorter, irregular, 

 transverse spots or bands between them and before them to near base of 

 the wing, numerous short, nearly confluent, transverse spots at apex and 

 hind margin, and series of transverse pale fuscous spots in costal and anal 

 areas; a pale longitudinal line bisects costal space through bases of inter 

 costal forks ; pterostigma indistinct, creamy whitish ; posterior fork of 

 median somewhat bent toward cubitus, making the inner veinlet connect 

 ing with cubitus a little shorter than the outer (no inner connecting vein- 

 let in left wing of type); radio-median cross vein situated a little before 

 forking of median and joining radius at, or a little before, origin of first 

 sector (a little before first sector in right wing, at first sector in left wing, 

 in the type specimen) ; forking of median almost directly beneath origin 

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

 far out as, or beyond, inner gradate series and subpterostigmal radial 

 cross vein (at these in left wing, beyond these in right wing, in the type 

 specimen), posterior branch simple; four or five gradate veins in inner 

 series (four in right wing, five in left, in the type), the last beyond the 

 next to the last, five or six in outer series (five in right wing, six in left, 

 in the type). Posterior wings hyaline, faintly tinged with smoky on 

 gradate veins and elsewhere; veins mostly dark, the longitudinals pale at 

 base; first fork of radial sector plainly before forking of median. 



London Hill Mine, Bear Lake, altitude 7,000 feet, 29 July, 

 collected upon snow ; one specimen. 



Type. No. 7898, U. S. National Museum. 



This species bears some resemblance to H. kokaneeanus, but 

 differs from it in the position of the radio-median cross vein and 

 in the relative position of the forking of the median vein and ori 

 gin of first radial sector ; it differs, also, in that the vertex and 

 the meso- and metanotum are largely pale, the wings broader and 

 more rounded and their markings larger and more extended, 

 while the last veinlet of inner gradate series is beyond the next to 

 the last. It belongs in Banks' Group II, Section A, as do all the 

 other species of Hemerobius in the collection, with the exception 

 of H. disjunctus. 



