48 THE CANADIAN ENTOMOLOGIST. 



ON SOME CHALCIDID./E. 



BY G. H. FRENCH, CARBONDALE, ILL. 



In the January number of the Canadl^n Entomologist I described 

 two new species of this interesting family under the names of Isosoma 

 Allynii and / Elymi. Professor C. V. Riley, to whom a pair of the iirst 

 were sent, writes me that they belong to the genus Etipelmus instead of 

 Isosoma. From a re-examination of my specimens I think he is correct, 

 and the species will be known as Eupehmis Allynii^ instead of as first 

 described. They have ii joints to the antennae, and the prothorax short. 



Since writing the descriptions above referred to I have had a number 

 of wingless insects hatch from my wheat straws, and it is now evident that 

 the description of chrysalids, and perhaps larvae, as given under Isosoma 

 Allynii, can not apply to that species, but to these wingless specimens. In 

 a recent letter Professor Riley states that he has bred wingless specimens 

 of an Isosoma from wheat received from Kentucky, and it is probable 

 these are the same. I am inclined to think they belong to Isosoma Elymi 

 that I obtained from the stalk of Elymus Canadensis, though it will be 

 difficult to say positively without more specimens of Elymi or winged 

 specimens of the other. The wingless ones are from .10 to .11 of an inch 

 long, inclusive of ovipositor, while the winged Elymi I have is ,07 of an 

 inch. Premature development might account for the difference. They 

 agree in the following points. Both have 9 jointed antennae with whorls 

 of hairs at the base of the joints, the antennae black except the base, 

 which is fulvous, the darkest in the winged specimen. The legs have the 

 femurs and tibiae fuscous, the joints fulvous, the feet, all but the terminal 

 joint, brownish yellow. Abdomen jet black, the ovipositor and hairs 

 brownish, the hairs arranged chiefly at the sutures of the joints. Head 

 and thorax dull or brownish black, coarsely punctured, the eyes piceous, a 

 fulvous spot on dorsum and sides of the prothorax and similar marks 

 under the thorax. Where there are light markings those on the wingless 

 specimens are a little paler than the corresponding ones on the winged 

 specimen from which my description of /. Elymi was taken. 



On the other hand, I have now (Feb. 9) larvas inside stalks of Elymus 

 Canadensis. Will they produce / Elymi or something else ? Rearing 

 them to the imago will alone tell, and that may help to settle the other • 



