10 AMKRICAN NEUROPTERA. 



hyaline, venation yellowish, rather more yellowish in the pterostigniatio region. 

 Forewings narrow, costal area narrow, discal cell not closed, no trace of the 

 cross-vein in either wing, first and fifth apical cells acute at base and not extend- 

 ing before anastomosis; radius slightly bent at the pterostignia; apical margin of 

 wing faintly rounded ; hind wings have the margin entire, the discal cell faintly 

 closed in one wing, not in the other, first and fifth apical cells acute at base. 

 Spurs 1-3-4. Expanse 18 mm. 



One specimen from Hampton, New Hampshire, May 17th (S. A. 



Shaw). 



Rliyacophila hyaliiiata n. sp. — Head black, with sparse yellow and 

 white hair; antennse pale, each joint with a brown band ; palpi pale; prothorax 

 with yellow lobes, rest of thorax blackish ; abdomen blackish above, yellowish 

 below. Legs pale yellowish, tibia I unmarked. Wings brownish hyaline, vena- 

 tion brown, except yellow subcosta and radius, pterostignia dark brown at base, 

 paler beyond, apical part of wing with numerous patches of white; a whitish 

 hyaline mark on ruedian vein at forking, extending down on connecting veinlet 

 toward cubitus; hind wings grayish hyaline, pterostigma very distinct dark 

 brown, venation yellow-brown. Length 14 mm. 



Several specimens from southwestern Colorado, July 22d (Oslar). 

 Similar to jR./i/sci//«, but not as dark, smaller, and with no dark 

 mark on anterior tibiae. 



Rhy»cophila coloradensis u. n. 



R. stigmatica Bks. Trans. Am. Ent. Soc. xxx, p. 108, 1904. 



I changed this in the explanation of the plate, but forgot to do so 

 in the text — there is an R. stigmatica in Eui-ope. 



BiAillAi^IYIA n. gen. 



A Sericostomatid. No ocelli ; spurs 2— i-4 ; aiitennse short, basal 

 joint longer than head ; wings broad, closed discal cells in both fore 

 and hindwings, in forewings a cross-vein connects radial sector to 

 radius ; all five forks in forewings, three and four pedicellate. 



Type. — N. plutonis. 



Nainainyia plutonis n. sp. — Jet black throughout, hindwings scarcely 

 as dark as forewings; a black point in base of third apical cell in forewiug, 

 clothed with moderately long black hairs. Anteunai much shorter than wings, 

 stout, basal joint longer than head, clothed with long, semi-erect hairs. Vertex 

 broad, with a large wart each side, crowned with erect bristles; lobes of pro- 

 thorax large and crowned with erect bristles. Legs rather long, thickly clothed 

 with hair; spurs long; subapical pair of middle tibite at end of second third, in 

 hind tibiiu beyond second third ; hind tibiae plainly longer than hind femora, 

 middle tibiai as long as femora; first joint of hind tarsus longer than second and 

 third together. Hind wings broad, not much shorter than fore pair, and as in 



