June, '02] ENTOMOLOGICAL NEWS. 179 



differs from the specimen Dr. Loew received from Mr. Belfrage, 

 and taken some hundred miles north of here. The differences, 

 however, do not seem to be of specific importance. In the 

 Austin form the white bands of the abdomen are narrow, but 

 clear cut, of uniform width, and only one-tenth as wide as the 

 remaining shining black of the segments. The venter is simi- 

 larly colored, although from the convexity of the abdomen, the 

 white bands seem comparatively wider ; the first ventral seg- 

 ment is black, with the narrow apical margin whitish. The 

 knees, tibiae and base of the tarsi are almost wholly pale fus- 

 cous, the darker coloration of the upper side of the tibiae appar- 

 ently less evident than in Mr. Belf rage's specimen. Instead of 

 possessing a black margin the tegulae are w r holly translucent 

 whitish. The base of the wings is lightly infumated. 



4. Acrocera sp. 



A very beautiful and brightly marked, but undetermined 

 species was taken by Mr. F. Rauterberg at Rochester, Wiscon- 

 sin. Although it agrees in part with A. litnrata Williston 

 from Washington, I prefer to pass this species by, as I have 

 access to but a portion of the literature on. this genus. 



PTERODONTIA Gray. 



Scutellum wholly testaceous flavipes Gray. 



Scutellum wholly or largely black 2. 



2. Discal cell closed ; larger species (5 mm.) misella O. S. 



Discal cell open ; species measuring 4 mm analis \Vestw. 



5. Pterodontia analis West wood. 



Several specimens of this species were taken on leaves of low 

 trees in the damp woods about Wood's Hole, Massachusetts. 

 The determination is doubtless correct, although the northern 

 specimens disagree with the description in that they have 

 wholly black eyes, almost blue-black, tegulce with the disc 

 but little translucent, and black femora. Pt. /vW;v/v.v is said 

 to be commoner in the Eastern States, but we have never met 

 with it. 



6. Pterodontia misella Osten Sacken. 



. *' 



A typical specimen from Alameda Co., California. 



