NATHAN BANKS. 239 



NEW GENERA ANI> SPECIES 

 OF NEARCTIC NEUROPTEROID INSECTS. 



BY NATHAN BANKS. 



The following pages contain generic synopses of two families of 

 Neuropteroid insects and descriptions of various new genera and 

 species. Several species belong to genera not previously reported 

 from our country, but well known in Europe. Although in some 

 families of Trichoptera there are a considerable number of species 

 common to this country and Europe, our Neuropteroid insects, as a 

 whole, are rather sharply separated from the European fauna. In 

 some large families like the Chrysopidse and Myrmeleonidse; there 

 are no species common to the two continents. 



PSOCID.E. 



Psocus Oregon us n. sp. 



Head yellowish brown : antennae brown, slightly hairy; thorax black, a pale 

 line each side of the median lobe uniting hehind : legs brownish yellow, darker 

 at tips of femora and tibiae; wings glassy hyaline, with a faint tinge of amber, 

 veins brown, that closing the cell white, cell about twice as broad at base as at 

 tip, sometimes a few brown clouds near middle of wing; the pterostigma mar- 

 gined with heavy veins and prominently brown ; hind wings hyaline, veins 

 brownish. 



Length 3.5 mm. 



Ashland and Divide, Oregon ; Temino, Washington, September 

 (A. P. Morse). 



Psocus virginianus n. sp. 



Black, wings uniform black, veins black, interrupted with white dots and 

 around the margin interruptedly white ; hind tibia testaceous, black at tip, basal 

 joint of all tarsi pale yellowish ; hind wings blackish hyaline; venation on usual 

 plan, cell four sided, as broad at tip as at base; antenna? slender, not hairy. 



Length 3.5 mm. 



Falls Church, Virginia; August, September; living in crevices 

 of old rails, posts, etc. Easily known by uniform black color and 

 dotted veins. 



P*ocus barret! i n. sp. 



Head yellowish, nasus liueate with black, legs yellowish brown, paler below, 

 darker on outside and at tips of femora and bases of tibiae, tarsi dark ; antenna- 

 uearly black, with short hairs; thorax brown, blackish in front, a white line on 

 each side of the median lobe, uniting behind ; wings hyaline, brown clouds 

 along apical margin, and from its end a band obliquely across to the pterostigma 



TKANS. AM. KNT. BOO. XXVI. MAY, 1900 



