38 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



the apex; recurrent vein usually interstitial with first intercubitus; 

 radiellan cell gradually narrowing toward apex of wing; nervellus 

 nearly twice as long as lower abscissa of basella; posterior coxae 

 coarsely roughened on outer face; abdomen stout beyond first seg- 

 ment; first tergite without fossae on the petiole, finely striate on the 

 postpetiole, the striae converging strongly behind; ventral margins of 

 first tergite joined nearly to the middle of the segment; second and 

 follo\\dng tergites smooth and polished; ovipositor sheaths one-half 

 the length of the abdomen. Ferruginous; antennae ferruginous at 

 base, blackish on apical half; propodeum blackish; wings hyaline^ 

 stigma dark brown behind, pale brown along anterior margin; pos- 

 terior coxae blackish above at apex; posterior tibiae near base and 

 at apex, and the posterior tarsi, dusky; spurs of posterior tibiae 

 blackish; abdomen ferruginous, except the postpetiole, which is 

 blackish laterally. 



Male. — Agi-ees very well with the female, except as follows: An- 

 tennae 35-segmented, the flagellum entirely black or blackish; ocell- 

 ocular line distinctly longer than diameter of an ocellus; and the 

 malar space as long as the basal width of mandible. 



Type.— Csit. No. 24970, U.S.N.M. 



Type locality — Cheyenne Mountain, Colorado. 



Described from 13 female and 1 male specimens reared from 

 Euschausia ingens Hy. Edwards, by G. Hofer, May 27-June 10, 1916. 

 It is evidently a solitary parasite. The cocoons are dark brown 

 covered with a little loose grayish silk. Besides the type series the 

 United States National Museum contains 20 specimens from Mexico; 

 2 from San Francisco Mountains, Arizona; 4 from Flagstaff, Arizona; 

 and 3 labeled " Euschausia; Pinus ponderosa; Ariz." Doctor Brues's 

 collection has 10 specimens from Flagstaff, Arizona. The female 

 antennae are usually 33-segmented, while those of the males have 

 usually 35 segments. The color characters are relatively very con- 

 stant in this species. 



30. METEORUS DATANAE, new species. 



Very similar to liypJiantriae, but differing from that species in the 

 smoother and broader face, the longer malar space, the usually 

 stouter postpetiole and the slightly shorter ovipositor. 



Female. — Length 4.5 mm. Head transverse, temples strongly 

 receding; face a little broader at base of clypeus than long, very 

 minutely roughened; clypeus very prominent: malar space* about 

 equal to basal width of mandibles; antennae slender, 34-segmented; 

 ocell-ocular line slightly longer than greatest diameter of a lateral 

 ocellus; mesonotal lobes smooth and shining with only scattering 

 shallow punctures; parapsidal furrows present but not deeply im- 

 pressed, and terminating in a large ruguloso-reticulate area \vhich 



