THE CANAU1A.N, ENTOMOLOGIST. 117 



Manifestly if one was a variety of the oilier there should be no 

 difference in the season of appearing. 



The late Judge Truman, of South Dakota, took both species at 

 Volga. He was satisfied that they were distinct, and gave the same 

 reasons as cited above for his belief. 



Here at Louisiana we take a few abbreviatella nearly every year, but 

 have found no IVhiineyi. 



In the large number of specimens of both forms that we have taken 

 during the last twenty years or more we have never found an intergrade, 

 nor have we observed any variation of either form toward the other. 



Nothing short of breeding one or both in confinement can definitely 

 settle the question and prove or disprove their identity. 



But if we array the facts as above stated against the bare assertion 

 that " they look somewhat alike," the preponderance of proof seems to 

 favor the contention that they are distinct. 



If anyone has established the identity of these two forms we have 

 overlooked it. 



Prof. French, in his revision of the Catocalse, published in this journal, 

 rated both residua and Whitneyi as species, and they so appear in Dyar's 

 Catalogue, which adopts his classification. 



But Prof. French carefully consulted every available source of 

 information before passing upon the validity of a species. As the years 

 go by the intrinsic value of his work will be made manifest. 



SOME NEW SPECIES OF PARASITIC HYMENOPTERA. 



BY CHARLES T. BRUES, AMERICAN MUSEUM OF NATURAL HISTORY, 



NEW YORK CITY. 



Dryijius nigrellus, sp. nov. — Female. Length 4.25 mm. Wholly 

 biack, except tarsi, part of antennae and mandibles. Head black, finely 

 rugulose, faintly silvery pubescent and sub-shining. Vertex impressed ; 

 front with a short median impressed groove above the anlennse. Cheeks 

 roughened ; mandibles pale yellow, with the tip of the teeth black ; 

 quadridentate, the outer tooth the larger and the inner one extremely 

 minute ; palpi black. Antennae filiform, reaching to the base of the 

 abdomen, ten-jointed; first three joints and base of fourth rufous, remainder 

 black, except the last, which is pale yellow. Scape stout, slightly over 

 twice as long as the pedicel ; first flagellar joint twice as long as the scape, 

 remaining joints decreasing in length, except the last, which is one and 



