46 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol. 64. 



female from North Carolina (collection of T. Pergande) ; one female 

 from Falls Church, Virginia (R, C. Shannon) ; three females and one 

 male from Rosslyn, Virginia (H. H. Smith) ; one female from 

 Piiimmer Island, Maryland (H. S. Barber) ; two females from 

 Georgetown, District of Columbia (H. H. Smith) ; one male from 

 Philadelphia, Pennsylvania, (collection of W. J. Fox). These thir- 

 teen specimens exhibit but little variation, the greatest being in the 

 comparative length and width of the face and of the second tergite. 



PARABATES CRISTATOIDES, new species. 



At once distinguishable from the foregoing species by its strong 

 lateral traces of the propodeal carina and transversely cristate post- 

 scutellum, as well as its larger size. 



Very closely related to cristatus Thomson but differing constantly in 

 the longer apical tarsal joint, which in cristatus is distinctly shorter 

 than the third and in the present species almost exactly as long; 

 in cristatus also the abdomen is distinctly stouter, the second tergite 

 being much less than twice as long as wide at base. 



Female. — Length 15 mm. 



Shining, very faintly shagreened, only the mesoscutum and propo- 

 deum subopaque; temples strongly convex but narrow; ocelli touch- 

 ing eyes; face hardly as long as broad, laterally impressed, medially, 

 elevated; clypeiis rather flat, arcuately truncate at apex; antennae 

 about as long as body, slender, middle joints twice as long as thick. 

 Scutellum carinately margined to middle, thence ridged to apex; 

 postscutellum laterally carinate and medially transversely cris- 

 tate ; propodeum transversely striate, lateral portions of apical carina 

 strong, the area behind it concave on each side and polished; legs 

 slender; apical joint of hind tarsus almost as long as third; areolet 

 large, briefly petiolate; nervellus broken at about upper third. 

 Abdomen rather slender, the first tergite more than three times as 

 long as broad at apex and the second nearly twice as long as broad 

 at base; ovipositor short, the sheath narrow lanceolate not reaching 

 above top of apical truncature of abdomen. 



Ferruginous with antennae and legs concolorous, head largely 

 yellow, hind tarsi stramineous, venation pale. 



Male. — Differs practically only in being more slender with abdomen 

 only weakly compressed at apex, and having the apical tarsal joint 

 relatively shorter though still much longer than fourth joint. 



Type-locality. — Kaslo, British Columbia. 



Type.—Qat. No. 26003, U.S.N.M. 



Four females and two males taken at the type-locality by R.. P. 

 Currie; two females from Washington; and one male from Fort 

 Wrangle, Alaska. 



The size is uniform except for one female which is only 9 mm. long. 



