Vol. XXvii] ENTOMOLOGICAL NEWS. 227 



tibiae joint below the knee and tips of caudal tibiae and the antennae 

 except the pedicel and dorsal edge of the scape, pale lemon yellow. 

 Scape short, convexed distinctly beneath ; pedicel globular ; f unicle 

 joints narrowed at each end, shorter than the solid club, clothed with 

 long, scraggly hairs, subequal, 6 thickest, two and a half times longer 

 than where widest. 



Described from one male, twelve females reared from 

 Fhysokermes picea, Madison, Wisconsin, May 12, 191 5, June 

 30 (F. A. Fenton). 



Types: Catalogue No. 20136, U. S. N. M., one male, six 

 females on a slide (with other male encyrtids) ; two females 

 on a slide as paratypes. • 



Encyrtus ensifer Howard. 



The mandibles are only bidentate, the second tooth broadly truncate. 

 Xenocrepis mexicana new species. 



9. Length, 1.55 m.. Dark metallic blue, the wings hyaline, the 

 venation fuscous, the knees, tibiae (except sometimes the caudal tibia 

 just below the knee, a fuscous band), tarsi and scape pale yellow; rest 

 of antennae blackish, the pedicel lighter. 



Head and thorax densely scaly punctate, the dorsal abdomen glabrous 

 except distad where there is delicate scaliness. Head wider than the 

 thorax, rather thick, the occiput obscurely margined. Antennae in- 

 serted a little above the middle of the face; pedicel a little longer than 

 wide, barely longer than funicle i which is very slightly longer than 

 wide, 3 quadrate, 5 slightly wider than long; the three ring-joints all 

 short, I a little the shortest. Flagellum filiform, the club joints sub- 

 equal to funicle i. Mandibles 4-dentate. 



Postmarginal vein elongate, nearly as long as the slightly thickened 

 marginal, nearly twice longer than the slender stigmal. 



Propodeum finely punctate, with lateral carinae, no median, from 

 lateral aspect with a short, subglobose neck, conical, much longer at 

 the meson than at the spiracle, the latter small, cephalad. Parasidal 

 furrows only cephalad. Abdomen with a very short petiole from be- 

 neath the propodeal neck, slightly longer than the rest of the body, 

 pointed conical, not produced beneath, its second segment longest, 

 occupying somewhat over a third of the surface. 



Cephalic femur not swollen. 



$. Similar except that the body is weaker and the tibiae metallic 

 except at each end. 



Described from ten males, four females on tags in the U. S. 

 N. M., labelled "Scymnophagus tozvnsendi Ashmead, 6427° 

 = 6. Townsend. Issued November 30, 1894. Type No. 12725, 

 U. S. N. M." 



