1913] Banks — Neuropteroid Insects from Brazil 83 



THE STANFORD EXPEDITION TO BRAZIL, 1911. 



J. C. Branxer, Director. 



NEUROPTEROID INSECTS FROM BRAZIL. 



By Nathan Banks 

 East Falls Church, Va. 



Mr. Mann turned over to me a small but very interesting col- 

 lection for study ; some of them were in alcohol, and these cannot 

 always be placed with certainty, so that a few caddice flies 

 remain unnamed. 



Several of the species show a relationship with the fauna of 

 western Argentina; but there are hardly enough species for general- 

 izations in this regard. 



Psocid^e. 



Thrysophorus speciosus Busmeister. 



Several examples of this striking species from Porto Velho, 

 Brazil (Mann coll.) known from many parts of South America. 



Jschnopteryx cincta Enderlein. 



One specimen from Porto Velho, Amazonas, Brazil. Previously 

 known from the Amazon Region. 



Psocus albostigmus sp. nov. 



Dark brown; antennae brown on the extreme base, first long joint mostly yellow, 

 its tip and rest of the antennas nearly black; legs pale yellowish brown; abdomen 

 blackish near tip, very pale yellow on basal part of venter. Wings dark brown, a 

 broad whitish band across near base, and the basal half of the stigma white, rest of 

 stigma nearly black; a pale dot on the forking of the radial sector just behind the 

 stigma, one on the end of the anal vein, and the lower edge of the discal cell hyaline 

 white; veins blackish; hind wings gray, veins darker. Antennas sparsely hairy, 

 the hairs about twice as long as width of a joint; head with short hairs. Discal 

 cell nearly twice as long as broad at base, base one-half broader than tip, outer side 

 barely concave; stigma nearly angulate behind, the outer side long and sloping. 

 Length 2.7 mm. 



From Madeira Mamore River, Matto Grosso, Brazil (Mann 

 coll.). 



