24 PROC. ENT. SOC. WASH., VOL. 20, NO. 2, FEB., 1918 



margin, a narrow curved line on occiput connecting the lateral ocelli, a 

 line on each lateral margin of the praescutum following the parapsidal 

 grooves, a broader line on the lateral margins of the scutellum, and a spot 

 on each side of the postscutellum pale yellow or whitish; frequently also 

 an obscure longitudinal pale line on each side of the middle of propodeum; 

 antennae brownish black, the scape at base and the pedicel brownish 

 testaceous; coxae entirely and all femora and the hind tibiae for the most 

 part blackish, the trochanters, apices of all femora, fore and middle tibiae 

 and all tarsi pallid, the middle tibiae more or less stained with fuscous; 

 wings uniformly subhyaline. 



Male. In sise and color markings agrees with the female. Antennae 

 slightly longer than the body, the scape short, about twice as long as the 

 pedicel which is barely as long as thick; first funicle joint slightly the 

 shortest of the funicle joints and about one and one-half times the length 

 of pedicel; joints beyond the first funicle joint subequal in length and 

 tapering slightly in width toward the apex; club not differentiated. Other- 

 wise like the female. 



Type locality. Tempe, Arizona. 



Type. Cat. No. 21698 U. S. N. M. 



Host. Eggs of Stictocephala festina Say. 



Nineteen females and eighteen males, all from the type local- 

 ity, and reared by V. L. Wildermuth under Webster No. 6190. 

 Eighteen of the females bear, in addition to the Webster number, 

 the label Tempe No. 2739 while one female and all of the males 

 bear Tempe No. 2738. The type and allotype are mounted in 

 balsam on slides for better preservation. All paratypes are on 

 card points. The description was for the most part drawn from 

 the types before being mounted on slides. 



Polynema imitatrix, new species. 



Very similar to sibylla Girault but differs by being smaller in 

 size, the abdomen shorter and more robust, the marginal cilia of 

 the forewing two-thirds as long as the breadth of the wing or a little 

 moro than two-thirds as long, ths ovipositor not or barely 

 exserted. Differs from piceipes Girault by having much longer 

 marginal cilia on the forewing. Distinguished from maculipes 

 Ashmead by having fine and moderately dense discal cilia on the 

 forewing. 



Female. Length .95 m. Smooth and polished without apparent sculp- 

 ture. Antennae about as long as the he'ad, thorax and abdominal petiole 

 combined; first funicle joint very slightly more than half as long as the 

 second; third funicle joint approximately two- thirds as long as the second; 

 the joints beyond the third subequal and about the same length as the 

 first joint but distinctly thicker; club rather robust and nearly as long 



