THE CANADIAN ENTOMOLOGIST. 207 



earnestly the question to give up entirely the cultivation of wheat. The 

 only .conclusion to be made by the table would be that with an intermis- 

 sion of 30 to 40 years, a period of superabundance follows. Perhaps a 

 careful study of the old records from 174S to 1750 would give some evi- 

 dence, if the fly has ever been obnoxious here before the war. It is a 

 curious fact that such an intermission of the appearance of the Hessian fly 

 has occurred just in that quarter of the century, during which the most 

 ardent collector and student of the N. American Diptera — I may say the 

 founder of the American Dipterology — was here. In fact, Baron Von Osten 

 Sacken has never met here with this Hessian fly, which is not represented 

 in his collection nor in Prof. Loew's, both now in the Museum in Cambridge. 



Note. — As the paper was going through the press, I received two 

 pairs of C. destructor from Prof. J. A. Cook, the first American specimens 

 which have come to my hands. In comparing these with two pairs of 

 C. secalina from Prussia and Hesse, I was astonished to find the American 

 insects twice as large as the European ones, and almost entirely black. I 

 think they look so different that the identity is perhaps not sure. But a 

 larger series from both countries and a more detailed knowledge of Dip- 

 tera than are at my command, would be needed to decide the question. 



TWO NEW SPECIES OF EUPELMUS, WITH REMARKS UPON 

 E. (ANTIGASTER) MIRABILIS, WALSH. 



BY L. O. HOWARD, WASHINGTON. 



Eupelmus reduvii n. sp. — Female. — Average length of body 2.4 

 mm. Average wing expanse 4.6 mm. Head slightly wider than thorax, 

 which is of equal width with abdomen. Antennae sub-clavate, as long as 

 thorax. Collar rather long, much narrowed in front and concave above. 

 Anterior half of mesothoracic scutum convex ; a broad, longitudinal 

 depression posteriorly, the anterior corners of which are extended on in 

 the parapsidal furrows. Scutellum small, much narrowed in front. Abdo- 

 men somewhat concave above, keeled below. Middle tibial spine stout, 

 but not quite so long as first tarsal joint, which is much widened and has 

 a double row of serrations on its inner edge ; second tarsal joint also 



