NOKTH AMERICAN NEUROPTERA. 199 



DESCRIPTIOIVS OF NEW NORTH AMERICAN 

 NEUROPTEROID INSECTS. 



BY NATHAN BANKS. 



Ill the following pages I have brought together descriptions of 

 various new species which have come to ray notice, together with 

 some synoptic work on certain genera and one family. The final 

 determination of species must rest on sexual characters, but these 

 ought not to be used until the forms have been thoroughly studied 

 in all her parts for the detection of other characters. So I have 

 not as yet studied and figured the genitalia, but will leave such 

 work for a future revision of the various fiimilies, which I hope 

 abundant material may soon justify. 



PERLID^E. 



C'liloroperla coloradeiisis n. sp.— Head yellowisXeyes connected by 

 a black line and a black W mark in front, side spots black ; antennfe blackish 

 base yellow, basal joint blackish above; thorax yellowish, margin (except median 

 portion in front) black, the elevated ridges on sides also black, thorax once and 

 one-half broader than long, front margin bnt little convex; sides much rounded, 

 and hind angles rounded ; legs yellowish, tarsi and a mark on knees brown ; 

 abdomen dark brown or black, setae yellowish brown ; wings gray hyaline, veins 

 mostly brown, radial sector forked but once, its pedicel about one-half the length 

 of the fork, lower branch of cubital fork simple, five transversals in cubital area. 

 Expanse 20 mm. 



Colorado (C. F. Baker). 



Chloroperla inontana u. sp.— Head rather greenish yellow, quite 

 broad in front, ocelli connected by a black V-shaped mark ; basal part of antennae 

 yellowish, rest fuscous, basal joint above brown ; thorax yellow, brownish each 

 side, once and one-half broader than long, sides straight, and front margin nearly 

 straight; legs yellowish, tarsi brownish and a brown mark on knees; abdomen 

 rather brownish, darker above than below; setse- brownish, paler on the bases: 

 wings hyaline, veins mostly brown, costal ones yellow, radial sector forked once, 

 its pedicel being two-thirds the length of fork, lower branch of cubital fork is 

 forked again at anastomosis or near it, six transversals in cubital area, hind wings 

 with radical sector forked once. Expanse 18 mm. 



Mt. Washington and Franconia, N. H. (Mrs. Slosson). 



Chloroperla virgiiiica n. sp.— Head pale yellow, hind ocelli connected 

 by a transverse black band, from the middle of which arises a narrower black 

 stripe reaching to the front ocellus, the whole forming a T inarl^ basal part of 

 antennie pale yellowish, rest brownish, basal joint scarcely infuscate above; 



TRAN.S. AM. ENT. SOC. XXV. DECEMBER, 1898 



