22 AMERICAN NEUROPTERA. 



not margined with pale, distinctly broader behind than long, scarcely narrower 

 behind, hardly rugose above ; radial sector but little bent down at base, sector of 

 cubitus arising from cubitus, slightly bent down at tip. 



Golden, N. Y., July 6 [E. P. Van Duzee]. Small size and mar- 

 gined veins separate it from the other species known to me. 



ARSAPSIIA n. gen. 



Resembles Capnia and also Nemoura. But few transverse veins, 

 the costal ones like Nemoura, an oblique one beyond the tip of the 

 subcosta ; in the cubital area there is no series of transverse veinlets 

 as in Nemoura, but only two between the cubiti and one behind, in 

 this respect like Capnia ; below the end of the subcosta the two 

 veins do not arise from the radial sector, but from the transverse 

 veinlet ; and the second vein behind them arises from the transverse 

 veinlet instead of from the cubitus as in Nemoura; palpi short, last 

 joint short, cylindric ; three small ocelli. Wings not involuted, 

 anal area of hind pair large, folded ; second tarsal joint much 

 shorter than the two others ; two set?e. It differs from Capnia in 

 the longer apical cells, finer vein.s, and in the oblique veinlet beyond 

 the tip of subcosta. 



Type Arsajjnia decepta. 



Capnia vernalis Walk, very possibly goes in this genus, as it is 

 stated to have venation much like Nemoura ; the description does 

 not, however, apply to A. decepta, which differs in the pale setse, etc. 



Arsapnia decepta n. sp. — Length 6.5 8.5 mm.; alar expanse ll-l.'S. 

 Black, legs rather paler, and the setse much lighter in color. Wings grayish with 

 black veins, rather darker at basal end of pterostigma. Head and thorax clothed 

 with whitish pile ; no pale on prothorax ; body and legs quite hairy ; head rather 

 broader than prothorax, the latter a little broader than long, scarcely narrower 

 behind and faintly rugulose above : wings rounded at apex, second apical cell ten 

 to twelve times as long as broad, the posterior basal transverse vein continuous 

 across the post-cubitus, the sector from cubitus, or rather from the transverse 

 veinlet. quite suddenly bent downward at tip ; setpe nearly as long as the abdo- 

 men ; in the % there is a prominent tubercle before the tip. upon which the apex 

 of the bifid genital organ rests when reflexed. 



Four specimens. Ft. Collins, Col. [C. P. Gillette]. 

 SIALID^. 



Sialis concava n. sp. — Length 10 12 mm. Black, head with some ferru- 

 ginous smooth spots; wings blackish, sometimes the apex more hyaline, veins 

 black ; structure almost identical with S. infmnntn. but the head between the eyes 

 is plainly concave [in t>. infumata it is convex] and the median pair of smooth 

 spots are much shoiler than in that species; the venation presents no constant 

 differences. 



