ON SOME CHALCTDIDÆ

Extract

In the January number of the Canadian Entomologist I described two new species of this interesting family under the names of Isosoma Allynii and I. Elymi. Professor C. V. Riley, to whom a pair of the first were sent, writes me that they belong to the genus Eupelmus instead of Isosoma. From a re-examination of my specimens I think he is correct, and the species will be known as Eupelmus Allynii, instead of as first described. They have 11 joints to the antennæ, 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 larvæ, 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 Canadenis, though it will be difficult to say positively without more specimens of Elymi or winged specimens of the other.