244 AMERICAN NEUROPTERA. 



Chloroperla miiiuta n. sp. 



Black, bases of antennae yellowish, especially below, a small pale spot on mid- 

 file of hind margin of the head, an indistinct pale median stripe on prothorax, 

 hind tibiae brownish yellow; setae yellowish, of twelve to fourteen joints; wings 

 snbfumose, pale yellowish along the costal area, veins black, not heavy, a fork 

 near apical part of radial sector. Disk of prothorax finely rugulose each side. 

 Length 5 mm, 



Columbus and Medina, Ohio, May and June (J. S. Hine). 



This, at first sight, looks like a Captiia, but the forked radial sec- 

 tor, the finer veins, the shorter hind tarsi and the pale spots on the 

 head, prothorax and bases of antenna? are characters foreign to 

 Oapnia. This is the smallest species of the genus Chloroperla, but 

 agrees with the other species in all essential characters. 



Twniopteryx pacifica n. sp. 



Head dull black; antenna? brown ; prothorax dull black, anterior margin, and 

 usually the lateral margins narrowly reddish, base of mesothorax reddish, rest 

 of body black; legs yellow-brown, knees rather darker. Wings dull hyaline, 

 without marks, or an indistinct cloud near the middle, hind pair hyaline, veins 

 brown. Prothorax rather broader than long, a transverse sulcus in front, on the 

 disk are scattered small flat tubercles or scars; second joint of tarsi as long as 

 first, tips of tibiae with a pair of minute spines; ventral plate of the female is 

 nearly semicircular. Wings long, slender, subcostal with several cross-veins to 

 margin near tip, and a few near base, radial sector with but one fork beyond the 

 anastomosis, the vein from the discal cell arises near the radial sector, pterostig- 

 matic region long, with but one cross-vein. 



Length to tip of wings 12 mm. 



Pullman, Washington, April (C. V. Piper, R. W. Doane). 



Treniopteryx occidentalism n. sp. 



Head dull black, antennae dark brown; prothorax dull black, with anterior 

 margin narrowly reddish, rest of body black ; legs brown, darker on the femora; 

 wings hyaline, with dark irregular narrow bands, one at apex, one slightly before 

 it, one from the pterostigma, and a broader one toward base, also a basal spot; 

 veins brown, hind wings unmarked. Prothorax rather longer than broad, 

 equally broad in front and behind, near the front with a distinct transverse sul- 

 cus, on the disk without scars or sculpture ; second joint of tarsus nearly as long 

 as first; two small spines at tips of all tibia 1 ; female ventral plate large, as long 

 as broad, narrow and rounded at tip. Wings hardly as long as usual, radial sec- 

 tor two-branched beyond the anastomosis, subcosta with three or four short cross- 

 veins to the margin near tip of wing, pterostigma with two stout cross-veins. 



Length to tip of wing 13 mm. 



Ml. Barrier, Washington (C. V. Piper). 



NeuisMii'.'i stigmata n. sp. 



Head black, antenna? yellowish brown : legs yellowish, black on apex of femur 

 and base of tibia; prothorax yellow-brown : abdomen black, genitalia yellowish 



