71 



Loew's handwriting, the other "New York, Schaum." The de- 

 scription is based entirely on the first specimen, as the following 

 lines show: " Dorsum et scutellum ex nigro viridis . . . cel- 

 lula discoidali quam Metoponiae fuscitarsis Say multo minore." 

 The other specimen is pure black with a larger discal cell, — a 

 typical Allognosta fuscitarsis Say, and the locality of the type was 

 evidently inadvertently -transferred to this species. This leaves 

 the type without a locality. It is pinned precisely like a speci- 

 men of Allognosta obscuriventris Loew, labeled "D. C." collected 

 by Osten Sacken and described at the same time. I have little 

 doubt that this specimen was also collected by Osten Sacken, who 

 in Record of My Life Work in Entomology, p. 94, says: "Many 

 specimens in both collections will be found without any indication 

 of locality. Most of them are specimens of my own early col- 

 lecting, principally about Washington, D. C. In sending them 

 to Loew I always informed him of the localities, which for this 

 reason ought to be found recorded in his description." The 

 above conclusion as to the locality for this species is strengthened 

 by the presence of two females in the Nathan Banks Collection 

 taken at Falls Church, Virginia, June 28 and July 5, and a speci- 

 men from Petersburg, Virginia, June 1, in the collection of Dr. J. 

 Bequaert. The size of the discal cell is about the same as in 

 Allognosta obscuriventris, but the greenish-blue thorax and scutel- 

 lum, brown abdomen, and yellow halteres readily separate it from 

 that species. 



Allognosta brevicornis, sp. no v. 



d 1 . — Frontal triangle black, slightly pollinose, face white, with fine blackish 

 hairs, palpi black, proboscis yellow, brown above; antennae reddish, the base of 

 the second joint and the eight annuli of the third joint black, the latter conical 

 and less than twice the length of the basal portion; eyes contiguous, the facets 

 on the lower third of the eye minute. Thorax and scutellum black, shiny, 

 covered with short black hairs; humeri and post-alar callosities brown, pleura 

 reddish brown, black on the middle. Abdomen a uniform dark bronze, shin- 

 ing. Halteres black. Legs yellow, the tip of all the tibiae and the front and 

 middle tarsi entirely black, hind metatarsi yellow, the tip and remaining joints 

 black. Wings tinged with brown, the large stigma and veins dark brown. 

 Length 4.5 mm. 



9 . — Front black, shining, a slight central depression and a transverse line 

 above the antennae at about the middle of the head; below this line and the face 

 whitish, pollinose, base of the palpi reddish, and the antennae a brighter red 

 than in the male; pleura entirely red, sternum black. Halteres reddish. In 

 other respects resembling the male. 



Thirteen specimens. Holotype and allotype: Norwich, Vermont, 

 July 7, 1908. Paratypes: Mt. Greylock, Massachusetts, June 15, 

 1906 ; Jaff rey, New Hampshire, June 18, 1923; and Salisbury Cove, 

 Mt. Desert, Maine, July 12, 1923 (C. W. J.); Bolton Mt., Ver- 

 mont, July 15, 1922 (Owen Bryant), all in the collection of the 

 Boston Society of Natural History; New Hampshire (Osten 



