404 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 7 



been accidentally introduced. In replying, Doctor Howard, then an 

 assistant, now Chief of this Bureau, states that "Your number 124 is 

 an Aphidius and was undoul)tedly bred from Toxoptera and not from 

 Isosoma." That the species is parasitic upon Toxoptera is further 

 indicated by the fact that no other aphids were to be found in this 

 cage, either at that time or later, and this parasite did not appear in 

 other cages where Toxoptera was not present. Number 124 to which 

 Doctor Ashmead refers in his paper in the Proceedings oi the Entomo- 

 logical Society of Washington, is my old original number. While one 

 specimen was sent to Doctor Ashmead in corresponding with him on 

 June 1, 1893, from Wooster, Ohio, this was from the same rearing as 

 the original specimens sent to the Department, August 15, 1884. 



On account of the obscurity that has surrounded this species it was 

 unfortunately overlooked and not included in Bulletin No. 110, by 

 myself and Mr. W. J. Phillips, on the Spring Grain-Aphis or Green 

 Bug, Toxoptera graminum. It is also interesting to observe that the 

 species has not again appeared in any of our rearings of Toxoptera. 



A NEW LEUCOPIS WITH YELLOW ANTENNiE 

 By J. M. Aldrich La Fayette, Ind. 



Specific characters in the genus Leucopis are so obscure and uncer- 

 tain that one is almost inclined to doubt whether the half-dozen 

 nominal species from North America are not really all forms of the 

 same one. I am quite unable to distribute my forty-odd specimens 

 into species, either by the table given by Thompson (Canad. Ent., 

 XLII, 238, 1910), or that of Melander (Jour. N.Y. Ent. Soc, XXI, 232, 

 1913). Some material lately sent me from the Bureau of Entomology 

 for identification proves to be very distinct in having yellow antenna, 

 those of the described species being black in ground color. As the 

 group is economically important, the larvse being predaceous upon 

 aphids and coccids, it seems desirable to publish a description of the 

 new form. 



Leucopis flavicornis n. sp. Head, thorax, and abdomen except basal segment 

 cinereous pollinose, almost plumbeous, with silky lustre; antennae except basal 

 joint, tibiae and tarsi except tips, yellow; thorax and abdomen without brown stripes 

 or dots; palpi black. 



Third antennal joint large, orbicular, the thickened basal joint of the arista also 

 yellow; mesonotum almost uniformly beset with rather coarse, erect black hairs, a 

 very narrow median line, however, bare and hence appearing paler; scutellum and 

 hind edge of mesonotum destitute of these hairs. Fii-st abdominal segment brown 

 except hind edge; the numerous hairs of the abdomen (coarser and more scattered 

 than those of the thorax) arise mostly from good-sized black dots, which are not 

 sharply defined. Trochanters yellow, femora brown to blackish along the middle. 



Length 2.2 mm. 



