54 
the eye-height, abdomen of female thickly beset with short 
spines on under sides of the third and fourth segments; length, 
8 to 10 mm. Maryland, Dist. Columbia, and Virginia. (List 
Dipt. Insects, Part IV, p. 77!); 1849: Tachina.). .demylus Walk. 
3. Palpi black, third antenna! joint in the male eight, in the female 
from five to seven, times as long as the second; cheeks at least 
one-half as wide as the eye-height, front tarsi of female greatly 
dilated, abdomen destitute of stout spines on the underside. 4. 
Palpi yellow, insect otherwise black; front of male as wide as either 
eye, frontal bristles descending to apex of second antenna! 
joint, the pair in front of vertical ones not directed outward, 
cheeks one-third as broad as the eye-height, sides of face at 
narrowest part each one sixth as wide as the median depression, 
each bearing a row of bristly hairs, vibrissa' on a level with front 
edge of the oral margin, ridges bristly on the lowest fourth, 
antenme as long a s the face, the third joint four times as long as 
t lie second, arista thickened on the basal third, the penultimate 
joint as broad as long; thorax gray pollinose, marked with four 
black vittae, scutellum bearing three pairs of long marginal and 
a very short apical pair of niacrochaetae ; abdomen thinly gray 
pollinose, first segment bearing marginal, the others discal and 
marginal macroehaetae ; front pulvilli scarcely one-half as long as 
the last tarsal joint; wings hyaline, third vein bearing three 
bristles near the base, calypteres white; length, 5 mm. Ala- 
meda, Oal. Two males bred April 17, 1888, from chrysalids of 
Ret in ia sp. by Mr. Albert Koebele. Type No. 3532, (J. S. 
National Museum retinue n. sp. 
4. Front in the male one and one-third times, in the female twice, as 
wide as either eye ; the pair of frontal bristles in front of the ver- 
tical ones directed obliquely outward, arista thickened on the 
basal three-fifths, sides of face each bearing numerous hairs not 
arranged in a single row, the sides yellowish gray pollinose; 
length, 5 to 8 mm. From the type specimen. Beverly, Mass. ; 
District of Columbia, and Agricultural College, Miss. (Journ. 
N. V. Ent. Soc, Vol. Ill, \). 54; June, 1895.). . . . pergandei Coq. 
Front in the male slightly wider than, in the female one and one- 
fourth times as wide as, either eye; the pair of frontal bristles 
in front of the vertical ones almost perpendicular, arista thick- 
ened on the basal two-fifths, sides of face white pollinose, each 
bearing a single row of hairs; length, 5 to (> mm. From the 
type specimen. Franconia, N. H.; Beverly, Mass.; District of 
Columbia; Illinois, and Tifton, Ga. (Journal N. Y. Ent. Soc, 
Vol. Ill, p. 58; June, 1895: Hyjwstena.) degeerioides Coq. 
