10 NEUROPTERA OF NORTH AMERICA. 



base fuscous, veins fuscous ; pterostigma short, rounded ; cellule 

 of the posterior margin free, elliptical. 



Length to tip of wings 3=1 millini. Expanse of anterior wings 

 6 millim. 



Hob. New York. 



f f Tarsi two-articulate. * 



* Discoidal cellule closed, quadrangular. 



5. P. venosus ! 



Psocus venosus Burm.! IT, 778, 10; Walk. Catal. 484, 9. Ps. magnus 

 Walk.! Catal. 484, 10. Ps. microphthalmus Ramb. Neur. 321, 6. 

 Ps. aceris Fitch.! MSS. Collection of de Selys Longcliainps. 



Fuscous; head brassy, antenna blackish-fuscous (in the male 

 rather thicker, pilose), the two basal articulations luteous ; thorax 

 margined with yellow ; the feet luteous, tarsi fuscous ; anterior 

 wings fuscous or blackish-fuscous, pterostigma triangular, yellow- 

 ish ; basal veins yellowish, apical ones fuscous ; posterior wings 

 smoky-hyaline. 



Length to tip of wings 6 8 millim. Expanse of anterior wings 

 1215 millim. 



Hob. New York (Winthem, Asa Fitch, Uhler) ; Washington 

 (Osten Sacken, 1858) ; Mount Pleasant, Ohio ; Mexico (Deppe) ; 

 Cuba (Riehl, Poey) ; Maryland (Uhler). 



Specimens communicated by Baron Osten Sacken are a little 

 smaller, blacker, with the apex of the tibiae black ; but they belong 

 to this species. 



6. P. contaminatns ! 



Psocus contaminates Hagen ! 



Fuscous; nasus yellow, scarcely lineated with obscure brown; 

 the front luteous, two occipital spots, two at the nasus and two at 

 the ocelli black ; antenna rather slender, fuscous ; thorax black, 

 margined with yellow ; the feet luteous, knees and tarsi fuscous ; 

 wings hyaline, pterostigma triangular, blackish-fuscous ; apical 

 margin with a large band attaining to the inferior angle of the 

 pterostigma and a spot upon the middle of the posterior margin, 

 cloudy-fuscous ; posterior wings hyaline. 



Length to tip of wings 7 millim. Expanse of anterior wings 

 13 millim. 



