28 Psyche [April 



5. Scutellum yellow, cf , 9 (N.H., Vt., Mass., R.I.) pw^cAeZ/a Johns. 

 Scutellum black 6 



6. Posterior metatarsi broad, oblong, cf (N. Y., Me.) 



vanduzeei sp. no v. 



Posterior metatarsi broad, ovate and truncate, d^ (N. H., 



N. Y.) cushmani sp. nov. 



7. Thorax and abdomen both maculated with greenish white, 



halteres black (N. H., Mass., N. Y., N. J., Pa., Kan.) 



notata Loew 

 Thorax only maculated with greenish white, halteres yellow 



(Pa., D. C.) divergens Loew 



Thorax and abdomen without maculations, tip of the abdomen 



in the female cinereous, knobs of the halteres black (N. H., 



Mass.) talpula Loew 



8. Abdomen grayish on a yellow ground, with broad black tri- 



angles vanduzeei sp. nov. 



Abdomen grayish on a blackish ground (Mass.) 



var. ? ohscura var. nov. 



Agathomjda dubia sp. nov. 



d^. Head black, mouth parts and antennae yellow, aristae 

 brown. Thorax and scutellum yellow, pleura and metanotum 

 black, pronotum with three rows of black hairs, the outer rows 

 curving towards the humeri, a post-humeral, four notopleural, two 

 supra-alar and one dorsocentral bristles, scutellum with three 

 small lateral and two large apical bristles. Abdomen fulvous, the 

 terminal segment and genitalia black. Legs light yellow, posterior 

 metatarsi not enlarged, scarcely as wide as the tibiae. Halteres 

 fulvous. Wing hyaline with a long pale yellow stigma. Length, 

 3 mm. 



One specimen, Austen's Brook, Chester, Mass., August 4, 191 L 

 Type in the collection of the Boston Society of Natural History. 

 I have long hesitated in describing this, and since collecting it 

 have made four additional trips to the locality, hoping thereby to 

 get more material. That it may prove to be the male of A. fulva 

 is not unlikely, but the black pleura and terminal segment of the 

 abdomen make it very doubtful, while the presence of another 

 equally closely related form leaves only the one alternative to 

 avoid confusion. 



