A. A. GIRAULT. 29 



them also bore the label: " Bred from eggs of Ceresa btiba- 

 his, March 25, '86," and " Trichogramma." (For means 

 of identity see below.) 



Habitat. — United States : Illinois (Urbana); one other un- 

 known locality. 



Types.— Ty-^e No. iJ,JPJ, United States National Museum, 

 Washington, D. C, 1 c?", 4 9 's in xylol-balsam, 1 slide; 

 this slide bears the labels " 2793° " and " 15-18 " (see fore- 

 going). Cotypes. — Accession No. 39,120 (3 cf^'s, 1 9 in 

 xylol-balsam, 1 slide, Urbana, Illinois, July 17, 1908) and 

 44,165 (2 cfs, 8 9 's in xylol-balsam, 1 slide; label, " Tri- 

 chogramma ceresariun Ashmead. 2793*^. Issued March 22-30; 

 April 5-10, 1886." U. S. N. M. specimens), Illinois State 

 Laboratory of Natural History, Urbana, Illinois. 



This species first became known to me in 1908 when I 

 reared it from Ceresa eggs and called it a new species of Tri- 

 chograjnma in MS. Being from the same host it was at once 

 suspected to be the same as Trichogramma ceresarum Ash- 

 mead but the brief description of that species precluded any 

 conclusion regarding identities and the chances were about 

 equal one way as another ; there was no reason why the 

 same host could not have too distinct egg-parasites. The 

 identity of my specimens was not settled until several years 

 had passed and in the meantime I had established this new 

 genus Ittys for their reception. It was only upon access to 

 the remaining material of this family in the National Museum 

 that I definitely decided just what ceresarum was and that it 

 was the same as my specimens. There, mounted on tags I 

 found a large series of this species, labelled as such but not 

 bearing any indications of being typical material with the 

 exception of the date of their rearing, which read several 

 years earlier than the publication of the original description 

 of the species. No type of the species has ever been desig- 

 nated and it would be foolish not to accept this opportunity 

 to redescribe the species and deposit types. I do this here, 

 based on these specimens and those already listed. 



The species was originally described exactly as follows 

 (Ashmead, 1888): 



TRANS. AM. ENT. SOC, XXXVII. 



