1911] (J intuit, Species of Trichocjrammatihv (Hymenoptera). 151 



tinguished by the dimorphic males and the longer cephalic line 

 of discal ciliation of the posterior wings in the latter species. The 

 uniform coloration of minutum is not always present for in some 

 series the abdomen may contrast with the rest of the body of nor- 

 mal, yellowish specimens in being black, especially in the pase of 

 some males, the females of the same series being uniformly light 

 yellow in color and the two sexes in some series of reared speci- 

 mens may easily be determined in this way, by their color alone. 

 Redescribed from the following series of specimens : 



(1) 2 $ $ (September 3, 4, 1909) and 9 $ $ (August 25, 29, 

 September 1, 4 and 9, 1909) captured on a small window in a pig- 

 shed on a farm, Centralia, Illinois. Accession No. 41,682, Illinois 

 State Laboratory of Natural History, Urbana, Illinois ; 3 9 9 in 

 xylol-balsam, August 25, 1909 (2 slides) ; 1 9 similarly mounted, 

 August 29, 1909 and another September 1, 1909 (2 slides). 



(2) Four balsam slides labelled: ai "From egg of Eriocampoides 

 Umacina. Exp. 62. June 28, 1909. E. L. Webster," 1 9 $ 6 the same 

 and "Exp. 80, July 5, 1909. 11. L. Webster." 2 $ $ , 4 9 9 ; c the 

 same and "Exp. 82, July 9, 1909. E. L. Webster," 2 $ and d the same 

 with "Exp. 82, July 13, 1909. E. L. Webster," 1 9- The hosts were 

 collected at Ames, Iowa, (E. L. Webster) See No. 53, seq. 



(3) One balsam slide received from Professor F. M. Webster and 

 labelled "Web. No. 9100. Marion, S. C. Parasite on eggs of D. sacr 

 ■charalis. Bred Geo. G. Ainslie." 1^,2 ? 9 • See No. 49, seq. 



(4) 1 $ , 10 9 9 reared from noctuid eggs on Eicoria alba, 

 foliage, Urbana, Illinois, July 17, 1908. Accession No. 39,121, Illinois 

 •State Laboratory of Natural History, Urbana, 11 specimens in xylol- 

 balsam, 1 slide. 



(5) 1^,699 reared July 22, 1908, from the eggs of Archips 

 rosaceana Harris, Accession No. 39,137, Illinois State Laboratory of 

 Natural History, 7 specimens in xylol-balsam, 1 slide; the hosts were 

 collected at Edwardville, Illinois. 



The following specimens from the collections of the Bureau of 

 Entomology, U. S. Department of Agriculture, Washington, 

 D. C, through the kindness of Dr. L. O. Howard (and see later 

 also) : 



