70 Journal New York Entomological Society. [Vol. xxv. 



which is cut off by a nervure; tip with a large, subquadrate oval, 

 hyaline spot, the two arcuated nervures that pass through this spot 

 are margined with blackish; central cellule widely bilobated at the 

 tip, lobes equally approaching the inner margin, a nervure passes 

 from between the lobes to the edge of the wing, an abbreviated 

 nervure passes from the lobe nearest the base, half way to the inner 

 margin, and another nervure connects this lobe with the inner nervure 

 so as to form an additional cellule; feet yellowish; tarsi black; venter 

 pale, two last segments black on the disk; tergum with blackish hair 

 on the incisures." 



Say's description does not omit any important characters. Hal- 

 cyon is easily distinguished by having the third posterior cell bisected 

 by a cross vein. The average length is about 13 mm. This species 

 has a very wide range, and I have records of it from Kansas, Ne- 

 braska, Colorado, New Mexico, South Dakota (Aldrich), Michigan 

 (Aldrich), Toronto, Ontario (Aldrich), and Southern California. 

 Two specimens in the National Museum (Townsend, 827) from Chi- 

 huahua, Mexico, apparently belong here, although they differ some- 

 what from the typical forms. 



Anthrax nigripennis new species (figs. 4 and 5). 



This species is near halcyon, but the wings are much darker, and areas 

 which are blackish gray in halcyon, are deep black in this species. There is a 

 semi hyaline spot in the discal cell, and the usual hyaline spaces in the wing 

 tip are dark, smoky and very narrow. The axillary cell is dark brown, in 

 some specimens blackish. Dorsum of abdomen reddish with a broad black 

 median stripe (see fig. 4), the red in round spots on the sides of each segment. 

 First segment black. Scutellum dark red, the base black. Mesonotum grayish 

 black. In fresh specimens there are indications of gray vittae on the thorax. 

 Humeral and post alar callosities brownish red. Black pile on distal half of 

 segments 2 to 7, in tufts on the sides. The first two antennae joints are yel- 

 lowish red, the third black (fig. 21). Length 12 mm. Wing 13.5 mm. 



Type.—\J. S. N. M., Cat. No. 20739. 



Habitat. — Beltsville, Md. Four specimens were taken July 2 and 

 4, 1916 (W. R. Walton). Three specimens were collected July 9 

 in the same locality by the author, Mr. Banks loaned two specimens, 

 one from Falls Church, Va. (June 24), the other from Glencarlyn, 

 Va. (July 2). 



