54 HYMENOPTERA. 



apterous males but dimorphic males are not present here ap- 

 parently * and the apterous males of retorridum have a dif- 

 ferent antennal structure than those of semblidis ; the latter 

 agree as concerns antennal shape and structure with the 

 females, the winged male of the species differing as in the 

 case of the normal male of the genus. Hence, apparently 

 apterous males in this genus are aberrant forms perhaps with 

 more or less structural variation. 



Described from 17 males and 7 females received for identi- 

 fication from Mr. R. L. Webster, Office of the State Ento- 

 mologist, Ames, Iowa and reared from the eggs of the 

 wheat-head army worm, Meliaiia albilinea (Hubner). The 

 9 slides bearing the specimens were labelled as follows: (1) 

 " From eggs of Meliana albilinea. Exp. 602. Sept. 1910. 

 R. L. Webster", 4 slides, 6 d^'s, 5 cf's + 2 9 's, 3 c?'s and 

 3 (fs respectively. (2) "From eggs of Meliana albili?iea. 

 Exp. 528. 3 Sept., 1910. By T. M. M.", 1 slide, 1 9. 

 (3) same label and " Exp. 533. 7 Sept., 1910. By Thos. 

 McCalL", 2 slides, 1 9 each. (4) " Depositing into eggs of 

 Meliana albilifiea. Ames, Iowa, 23 August, 1910. R. L. 

 Webster", 1 slide, 1 9. And (5) " From eggs of Meliana 

 albilinea. Exp. 535. 30 August, 1910. By T. M. M.", 1 

 slide, 1 9 . 



Habitat. — United States : Corwith and Ames, Iowa. 



Types. — Type No. 13,628, United States National Museum, 

 Washington, D. C, 1 female in xylol-balsam (No. 2 in the 

 series of slides given above). Cotypes. — Accession No. 

 4-4-,186, Illinois State Laboratory of Natural History, Urbana, 

 Illinois, 2 slides, 3 d^'s of No. 1 and 1 9 of No. 5 of the 

 series of slides given above ; also 1 alate c? of No. 4 in the 

 series of slides given beyond. 



Since writing the foregoing, I have also examined the fol- 

 lowing specimens received from the same source as the 

 others already listed : (1) Five slides labelled " From eggs 

 of Meliana albilinea. Exp. 535. 30 August, 1910. By T. 

 M. M.", bearing respectively 3 9 's, 1 9,3 9 's, 3 9 's and 

 1 9. (2) One slide bearing a single female labelled " De- 



* See later for description of the winged male. 



