282 PROCEEDINGS OF THE NATIONAL MUSEVM. vol.58. 



punctate; postpetiole and second tergite at base obsoletely, longitudi- 

 nally aciculate; first tergite much longer than second, which is slightly 

 longer than third; remaining tergites together much shorter than 

 third; ovipositor sheath barely as long as first tergite. 



Black; antennae dark brown, paler beneath toward base; man- 

 dibles, palpi, tegulae, and front and middle coxae pale brownish; 

 hind coxae and tarsi darker; legs otherwise testaceous; wings hya- 

 line, venation of front wing dark brown, that of hind wing pale brown; 

 abdomen piceous black, tergites narrowly paler at apex. 



Ti/jM localiti/.- — Colorado. 



Type.— Cat. No. 22866, U.S.N.M. 



Described from three females collected by C. F. Baker. 



Genus CREMASTUS Gravenhorst. 



Subgenus CREMASTUS Gravenhorst. 



CREMASTUS FERRUGINEUS Davis. 



Cremastusferrugineus Davis, Trans. Amer. Ent. Soc, vol. 24, 1897, p. 364, female. 



The type of this species runs in my key to females to graciliventris 

 Cushman, but differs from that species as follows: Lateral ocellar, 

 postocellar, and ocell-ocular lines in ratio of 1 : 2 : 1, ocelli 1 ; occipital 

 and ocellar black spots confluent, latter extended down front to base 

 of antennae; a V-shaped spot, with base at middle of propodeum and 

 a branch each side of scutellum black; wings hyaline. 



This species was tabulated in the earlier paper, but the specimen 

 used in keying out the species was evidently incorrectly determined. 



CREMASTUS BREVINERVIS, new species. 



Female. — Length, 4 nma.; antennae, 2.5 mm.; ovipositor, 1.5 mm. 



Runs in my key to females to cooJcii Weed, from which it differs 

 as follows: Somewhat smaller; head from above with temples less 

 strongly rounded, from in front nearly transversely oval; malar 

 space barely half as long as basal width of mandible; clypeus strongly 

 convex; antennae shorter, reaching only to apex of first tergite; 

 diameter of lateral ocellus much shorter than ocell-ocular line; thorax 

 with very fine, dense punctuation; wings with veins beyond second 

 recurrent practically erased; metacarpus shorter than stigma; second 

 discoidal cell very short, the second recurrent much more than half 

 as long as first abscissa of subdiscoideus; second tergite only very 

 finely and inconspicuously striate. 



Black; orbital rings complete except for short interruption at top 

 of eye; cheeks, malar space, clypeus, and mandibles yellow; scapo and 

 pedicel but not basal joints of flagellum vellow below; legs as a whole 

 darker, but coxae not at all black at base; front and middle coxae and 

 trochanters white, hind pah red; hind femur at apex and tibia, as 



