46 ENTOMOLOGICAL NEWS. [Feb., 18 
Hercostomus unicolor Loew. 
Dr. J. C. Bradley took two males at Blue Lake, Humboldt 
County, California, and a female which seems to belong to 
this species in Colorado. I took both males and females at 
Kearney, Ontario. Loew described it from Hudson Bay, and 
Wheeler from Wisconsin. 
Asyndetus appendiculatus Loew. 
Dr. J. C. Bradley took a male of this interesting species 
at St. Petersburg, Florida, August 10, 1910. Loew described 
it from Rhode Island. 
Tachytrechus laticrus Coquillett (Figs. 3, 4). 
é—Length 5.5 mm. Face covered with yellow pollen which gives 
it a velvety appearance, rather narrow in the middle; palpi and pro- 
boscis black; antennae wholly yellow, third joint rather small, slightly 
pointed; arista black, dorsal, with a small lamella at tip, about as 
long as the height of the head; front black, dulled with yellowish 
pollen; ocellar tubercle prominent with two large bristles; orbital cilia 
black. 
Thorax metallic black with bluish reflections on the dorsum, shin- 
ing but dulled with brown pollen on the dorsum and silvery pollen 
on the pleurae; this white pollen extends along the front over the 
humeri but is interrupted before reaching the acrostichal bristles, these 
bristles small but forming two close set rows which reach a little be- 
yond the middle of the dorsum; scutellum black with a slight de- 
pressed, pollinose space on each side, leaving a flat, shining, raised 
space in the center. 
Abdomen metallic greenish black with considerable white pollen on 
the sides; hypopygium rather large, black, shining on the inner side, 
covered with whitish pollen on the outer surface; lamellae nearly 
Fig. 1.—Parasyntormon lepus sp. nov., antenna. 
Fig. 2.—Hydrophorus curvipes sp. nov., fore leg. 
Fig. 3.—TZachytrechus laticrus Coq., fore tibia. 
Fig. 4.— ‘ss oy Coq,., fifth tarsal joint of fore foot. 
