FOUR NEW SPECIES OF NORTH AMERICAN CHLOROPID/E 61 



the anterior margin of cheeks slightly produced ; cheeks of moderate and 

 regular width, yellow, the upper portion white pollinose, the lower meurgin 

 narrowly browned ; palpi and proboscis yellow. Mesonotum black, shin- 

 mg, slightly gray dusted ; the center line of punctures single, narrow ; the 

 two outer lines broad and deep, all three lines opaque ; each side of the 

 furrows, or lines of punctures, has a series of short, pale hears arranged 

 closely on the margins, between the central and outer furrows there is a 

 single line, on each side, of similar hciirs, and beyond the outer furrows 

 the hairs are more irregularly arranged ; pleurae black-brown, gray dusted ; 

 scutellum subglobose, black, the surface slightly warty in appearance and 

 with scattered, pale hairs as on mesonotum, margin with four short tuber- 

 cles, on the apices of each of which is a pale, short, thorn-like bristle. 

 Abdomen short and broad, shining black, or black-brown, venter yellow- 

 ish ; surface hairs pale. Legs yellow, generally with all femora darkened 

 on middle, and the hind tibia with a brown band near base and another 

 near apex ; the other tibiae are sometimes darkened on the basal half ; 

 tarsi pale except the apical joint, which is brown. Wings clear, veins 

 black-brown ; third and fourth veins upward bent, but slightly divergent ; 

 outer cross vein very acutely placed, almost parallel with the hind margin 

 of wing ; last section of fifth vein distinctly longer than penultimate section 

 of fourth. Halteres yellow, knobs whitish. 



Length, 1 mm. 



Male : Similar to female in all respects but as a rule more distinctly 

 varied in color of legs ; the hypopygium is of normal size, shining black. 



Type: Cat. No. 15672, U. S. Nat. Mus. 



Locality : Rock Creek, District of Columbia (R. C. Shannon). Taken 

 hrom old birds' nests February 10, 1913. 



Paratypes: Same locality as type, 38 specimens representing both 

 sexes ; I specimen District of Columbia (collection Coquillett) ; and one 

 Plummers Island, April 1 9, 1 903 (H. S. Barber). 



This species probably has no connection with birds' nests other than in 

 its selection of them as its hibernation quarters, as I have seen several 

 specimens reared from Morchella esculenta and M. conica by F. J. Veih- 

 meyer, Takoma Park, District of Columbia, April-May, 1912. 



Botanobia ( = Oscinis) conf usa, new species. 



Male : Yellow, shining. Antennae black, the basal two joints paler ; 

 frontal triangle more or less brown or black. Mesonotum highly pol- 



