520 I'ROCEEDINGS OF THE NATIONAL MUSEUM. vol.58. 



Cocoons. — White, thin; firmly held together in small groups of 

 three to six. 



In addition to the type series the National Collection contains the 

 following specimens of this species : Two specimens reared by T. H. 

 Soden from Tortrix., species at Cohoes, New York, under Quaintance 

 No. 9269; 13 specimens bearing Bureau of Entomology No. B212°, 

 parasitic on Paedisca on Solidago lanceolata; 5 specimens reared 

 by A. B. Gahan at College Park, Maryland, from cocoons on Eng- 

 lish walnut and believed to have been parasitic on Acrohasis caryae; 

 7 specimens collected at Agricultural College, Michigan; 2 speci- 

 mens from southern Quebec, Canada ; and 1 specimen from Monroe 

 County, New York, reared from an unknown leaf-roller. 



48. APANTELES LACTEICOLOR Viereck. 



Apanteles (Apanteles) lacteicolor Viereck, Proc. U. S. Nat. Mus., vol. 40, 



1911, p. 475. 

 Apanteles lacteicolor Viereck, Muesebeck, Journ. Agr. Research, vol. 14, 



1918, p. 194. 



Habitat. — Europe; New England. 



Hosts. — Ewproctis chryson^hoea Linnaeus; Porthetria dispar Lin- 

 naeus; Acronycia Juista Guenee (Muesebeck) ; Hyphantria textor 

 Drury. 



Cocoons. — White ; solitary. 



In addition to the type series in the National Collection, the writer 

 has seen several hundred specimens at the Gipsy Moth Laboratory, 

 at Melrose Highlands, Massachusetts. 



49. APANTELES DIATRAEAE. new species. 



Female. — Length, 2mm. Face punctate and shining; vertex 

 strongly shining; antennae shorter than the body, mesoscutum flat, 

 weakly punctate anteriorly, impunctate and polished behind; disk 

 of scutellum wholly impunctate and highly polished; the lateral 

 face of scutellum with the posterior polished area small, semicircular, 

 and not extending anteriorly half way to the base of the disk ; meso- 

 pleura exceedingly highly polished, with a very shallow polished 

 depression posteriorly; propodeum finely roughened, shining, and 

 with an elongate areola, which is margined by strong carinae, and 

 is apparently confluent with the basal median area; radius of fore 

 wing slightly longer than transverse cubitus, and uniting with the 

 latter in a sharp angle ; nervellus curving ver}^ strongly liehind toward 

 base of wing ; posterior coxae smooth and shining ; inner spur of pos- 

 terior tibiae slightly longer than the outer, and almost half as long 

 as the metatarsus; first abdominal tergite very narrow and parallel- 

 sided, about as broad at apex as at base, the apical angles acute, the 



