NATHAN BANKS. 15 



Hydropsyclie bifida n. sp.^Pale brown, bead witb yellowisb and gray 

 hairs above; palpi pale brown; antennse pale, spirally annulate witb brown; 

 legs pale yellow; thorax brown, grayish in the middle above; abdomen pale, 

 with a black stripe on each side. Wings pale brownish hyaline, indistinct darker 

 spots along the outer margin, clothed witb yellowish and blackish hairs; hind 

 wings paler, and with long pale gray fringe. Head of male broad, the eyes 

 widely separated; middle tibiae with the preapical spurs much before middle, 

 scarcely beyond first third ; in the hind legs the preapical spurs are at about end 

 of second third, one and two-thirds their length before the tip. The wings are 

 moderately slender and of usual venation. Expanse 16 mm. 



One pair from Ft. Collins, Colorado. 



Readily known by the shape of the upper plate of male genitalia. 



Hydropsyche kaiisensis n. sp. — Pale yellow throughout, face with 

 short white hair; basal joint of antennae rather reddish, others faintly darker at 

 tips; vertex with short white hair; yellow hair on thorax. Wings pale yellow, 

 clear, with few yellowish hairs, venation yellowish, but the anastomosis and 

 some veins near by are brown ; fringe short, mostly dark gray ; hindwings pale, 

 with pale venation. Eyes of male rather small ; wings elongate, and rather nar- 

 row, the third fork with a much longer pedicel than fork 2; anteunce twice as 

 long as wings; subapical spurs on hind tibife are at end of second third ; subaj)i- 

 cal spurs on middle tibiae are at middle, and much more than their length from 

 base. Length 9 mm. 



Several from Douglas Co., Kansas, June, July, August (Snow). 



Arctopsyche irrorala Bks. — Head dull dark brown, with some yel- 

 lowish hair; palpi yellowish ; antennae clear yellowisb, basal joint brown ; thorax 

 and abdomen brown, pleura yellowish; legs pale yellowish, the tibiae and tarsi 

 very pale. Wings brown, densely irroiate with yellow, mostly in the foi-ni of 

 rounded spots, about a dozen of these along the costal region, the brown some- 

 times forming bands; hindwings gray. Forewings rather long, the radial sector 

 connected to radius beyond the discal cell, fork 1 with a pedicel one-half its 

 length, fork 4 and 5 of about equal length. Expanse 32 mm. 



One specimen from Black Mt., North Carolina, June (Beuten- 

 miiller). 



Holocentropus placidus n. sp. — Head black, above vpith white hair; 

 palpi brown ; antennte pale yellowish, darker on tips; prothorax with gray hair; 

 mesothorax gray in middle, rest of thorax and abdomen black ; legs pale yellow- 

 ish. Wings often nearly hyaline, barely marked with brown and yellowish spots 

 in apical and anal regions; when fully marked, densely irrorate with brown and 

 yellowisb or whitish ; mostly in form of narrow irregular bands, a larger spot at 

 arculus, a distinct one at pterostigma, and several others of large size on costal 

 region, also a dark brown one at middle of cubital vein ; hindwings dusky, vena- 

 tion darker. Forewings rather slender, discal cell about one-half the length of 

 its pedicel, fork 1 not pedicellate and broad at base; fork 3 with pedicel scarcely 



TRANS. AM. ENT. SOC. XXXII. NOVEMBEE, 1905. 



