114 PSYCHE [June 



thighs, tips of the tibia and tarsi darker." The markings on the femora really 

 consists of a large patch of black occupying the greater portion of the upper side of 

 the front and middle femora, and the upper side of the outer half of the posterior 

 femora. The only specimens in my collection were taken in Fairmount Park, 

 Philadelphia, Aug. 4, 1892, and Castle Rock, Delaware Co., Pa., Aug., 11, 1901 

 (E. Daecke) Atomosia rujipes Macquart is undoubtedly a synonym. 



In A. puella Wied. the legs are black except a narrow ring of yellow at the base 

 of the femora, and tibiae ; antennae entirely black. The species is widely distributed, 

 appearing in the Gulf States in May, and in the vicinity of Philadelphia late in June 

 or early in July. A. pusilla Macq. can also be added to the synonymy. 



In A. sayii the legs are pale yellow, with a minute spot at the base of the 

 posterior femora, terminal joint of the tarsi, and claws blackish; the third joint 

 of the antennae are noticeably longer than m. ^xlho-X A. glahrata ox A. puella \ the 

 second joint being brown. In its habits A. sayii differs considerably from the 

 others. On July 23, 1893, at Folsom, Delaware Co., Pa., I captured over 75 speci- 

 mens of both sexes, and invariably on the leaves and terminal shoots of plants ; 

 while A. puella and A. glabrata are as a rule found on stumps, logs, or the trunks 

 of trees. 



Its distribution is similar to A. puella^ but appearing somewhat later: 

 Opelousas, La., June (Pilate) ; in the vicinity of Philadelphia, July 23 to 31. 



Atomosia soror, Bigot from Lower California, resembles A. sayii in having pale 

 yellow legs ; but is distinguished by the lighter colored antennae, the more abun- 

 dant, prostrate, yellow hairs on the thorax and abdomen, and red post-alar 

 protuberance. 



