1910] Johnson—Diptera of New England 229 
the joints of the latter annulated with black, with an apical band 
of black on the tibize. In the closely allied species C. cruciatus 
Say, the color of the legs is extremely variable. There seems there- 
fore to be little doubt but that this represents only an extreme 
variation of C. nigripes although the species has not been recorded 
north of the Black Mountains, N. C. 
Phthiria borealis n. sp. 
Black, covered with a dense yellowish gray pollen; the frontal orbits, occiput, 
humeri, scutellum and a narrow posterior margin on the abdominal segments, dull 
yellow; antennz and proboscis black, the latter slightly more than double the 
length of the head; legs black, tips of the coxze and femora yellow; halteres light 
yellow with a brown spot on the side of the knob. Wings pure hyaline. Length 
3.5 mm. 
Type @, Fort Kent, Maine, August 7, 1910. Two specimens were 
also collected by Dr. J. A. Cushman at Little Black River Rapids, 
Maine, September 13, 1907. This is the most northern representa- 
tive of the genus thus far discovered in North America. 
Phthiria sulphurea Loew. 
A specimen of this species from Horse Neck Beach, Mass., 
collected August 9, by Dr. G. de N. Hough is in the collection of 
the American Museum of Natural History. 
Phthiria coquilletti Johnson. 
Two specimens were collected by Dr. J. A. Cushman on Nan- 
tucket, Mass., July 4, 1906. They are slightly smaller than the 
types from southern New Jersey. 
Phthiria cyanoceps Johnson. 
In addition to the type locality (Cohasset, Mass.) this species 
has been taken at Barbour’s Heights, R. I., September 19, 1908, 
by Prof. John Barlow. 
Chalcomyia aerea Loew. 
This interesting species was taken at Auburndale, Mass., 
May 8, 1905. I have also collected it near Clifton, Delaware 
County, Pa., May 5, 1895, on an old log in the bright sunlight. 
