8 PROCEEDINGS OF THE NATIONAL MUSEUM von. 72 



the specimen recorded in Insect Life under " Gryptus cyaneiventris 

 Riley MS." Three females and one male reared by Hart and loaned 

 me by the Illinois State Natural History Survey have also been 

 -examined. The Illinois male has the red of the legs much paler than 

 in the type and also has a small white spot on the scutellum, but 

 seems not to differ otherwise. 



The following characters of the female are given for comparison 

 with the corresponding characters of the new species. 



Scutellum and spot at apex of abdomen white; abdomen black 

 with faint purplish reflection, apex of second tergite narrowly red- 

 dish ; tibiae and tarsi black or blackish. Eyes longer than width of 

 face, very slightly convergent below; temples strongly receding; 

 their anteroposterior length much less than that of eye. Thorax 

 much less than twice as long as deep (measured from middle of 

 mesosternum to middle of scutellum) ; petiolar area longer than 

 combined areola and basal area; legs slender, apical joint of hind 

 tarsus slightly shorter than second joint; first tergite much less 

 than half as broad at apex as long, petiole slender, dorsal carinae 

 weak, spiracle at apical third; second tergite nearly as long as 

 broad at apex ; ovipositor slender, apex elongate sagittate. 



TRICHOCRYPTUS BICOLOR, new species 



Immediately distinguishable from hirtifrons (Ashmead) by its 

 red abdomen. 



Female. — Length 5.5 mm. ; antennae 3 mm. ; ovipositor 1 mm. 



Head rather thick, temples rather broad, their antero-posterior 

 length nearly equal to that of eye; eyes as long as width of face, 

 distinctly convergent below. Thorax fully twice as long as deep; 

 propodeum in profile straight above, precipitate behind, petiolar 

 area shorter than combined areola and basal area ; legs rather stout, 

 apical joint of hind tarsus as long as second joint; wings long; 

 areolet slightly convergent above; nervellus broken below middle. 

 First tergite stout, barely twice as long as broad at apex, dorsal 

 carinae strong, spiracles at about middle, petiole thick, flattened 

 above and broader than deep; second tergite much broader at apex 

 than long; ovipositor stout, sword-shaped, not apically sagittate. 



Head and thorax entirely black, with blackish pubescence, an- 

 tennae and palpi dark brown; wings faintly smoky; legs ferrugi- 

 nous with only the trochanters blackish; abdomen, except petiole, 

 pale ferruginous, apex immaculate. 



Type locality. — Sprague, Washington. 



Type.— C^t. No. 40438, U.S.N.M. 



One female taken July 16, 1922, by M. C. Lane. 



