HYMENOPTEROUS PARASITES. 1889 



domen shining blacli with metallic green and blue reflections ; antennae dark brown ; 

 all coxae dark with metallic reflections; all femora dark brown, the hind pair slightly 

 metallic; all tibiae brownish for a little more than basal half, tip honey-yellow; 

 all tarsi and tibial claws yellow. Length, 2 mm. ; expanse, 3.9 mm. 



Male. — Agrees with female in all characters mentioned except antennae. These arise 

 in a deep groove half way between eyes and border of mouth. The scape is short, 

 reaching only to middle of eyes; pedicel slightly shorter than first funicle joint; 

 remaining funicle joints all subequal in length and width, with short hairs, and well 

 separated from above; club consists of two joints, similar to funicle joints, easily dis- 

 tinguished, the last one rounded at tip. Color of the antennae, honey-yellow through- 

 out. 



The series of specimens of this species studied consists of seven females 

 and one male, aU obtained by E. Norton from Jasoniades glaucua. Most 

 of the species of Copidosoma which I have studied infest small lepidopterous 

 larvae, which they inflate upon pupating, giving to the caterpillar skin a 

 swollen appearance, frequently stretching it until the cells of the little para- 

 site can plainly be seen. In the absence of any notes concerning Mr. Nor- 

 ton's experience, I imagine tliat his specimens were reared from a glaucus 

 larva which was not more than lialf grown. 



Gends PTEROMALUS Swederus. 



Mandibles 4-dentate, the left rarely 3-dentate; cheeks often compressed; clypeus 

 emargluate in middle; eyes sometimes hairy; antennae usually Inserted slightly below 

 middle of face upon a convex, slightly protruding portion ; scape not short, ring- 

 joints distinct, club not stylate. Thorax compact, not elongate; metanotum usually 

 punctulate, spiracles rarely large. Wings with the stigmal vein usually shorter than 

 the postmarginal, or equal to it in length; marginal not thickened; usually (always in 

 male) immaculate. Abdomen often rotund ; venter in male rarely with a straight fold. 

 Posterior coxae broadly ovate, not pubescent at posterior base. (After Thomson.) 



Table of Species. 



Clypeus 2-dentate in middle chionobae. 



Clypeus not 2-dentate. 



Femora of female honey-yellow archippi. 



Femora of female brown, somewhat metallic puparum. 



Pteromalus chionobae sp. nov. 



Female. — Clypeus 2-dentate in middle at apex; antennae inserted somewhat below 

 middle of face, scape reaches to anterior ocellus ; flagellumwell clothed with short 

 white pile ; facial impression well-marked ; eyes smooth ; metanotum with a strong 

 and complete median carina, spiracles small, spiracular sulcus plain, but not reaching to 

 acetabulum, neck punctate, border of acetabulum smooth, with a row of deep shal- 

 low punctures just above it. Postmarginal vein equal to stigmal in length, speculum 

 small. Head and thorax densely puntulate ; abdomen smooth, ovate, concave above. 

 Color bronzy green ; scape honey-yellow ; pedicel below honey-yellow ; femora brown, 

 tibiae and tarsi lighter towards tip. Length, 3 mm.; expanse, 5.5 mm. 



Two female specimens of this species were reared by Mr. Scudder in 

 August, 1887, from a chrysalis of Oeneis semidea. The chrysalis was 

 ■carefiilly dissected, but no more parasites could be found. 



