104 
r>. Abdomen wholly covered with pollen, opaque; face yellowish polli- 
nose, third antenna! joint four times as long as the second; 
black-, the palpi usually and apex of proboscis, yellow, a spot 
on sides of abdomen of male and the tibiae also sometimes yel- 
low: front of the male three-fifths, of the female three-fourths, 
as broad as either eye, two pairs of orbital bristles in the female, 
none in the male, frontal bristles descending below the arista, 
cheeks one-fourth as broad as the eye height, antennae nearly 
as long as the face, arista thickened on the basal third, facial 
ridges bristly on the lower four-fifths; thorax gray polli- 
nose, marked with four black vittae; bristly hairs of abdomen 
depressed, first two segments each bearing a marginal pair, the 
third with a marginal row. the fourth with a discal and a 
marginal row of macroch setae ; wings hyaline, base of third 
vein bearing two bristles, fourth vein strongly arcuate beyond 
the bend: calypteres white; length, 7 to 11 mm. Dist. Colum- 
bia; Lexington, Ky.. and Tenn. Three males and two females. 
Type No. 3604, U. S. National Museum leucanicen. sp. 
Abdomen destitute of pollen on the broad apices of the last three 
segments, face white pollinose, third antenna! joint from two 
and one half to three times as loug as the second, front of female 
from the sixths as wide as to slightly wider than either eye, 
frontal bristles descending almost to apex of second antennal 
joint, facial ridges bristly on the basal two-thirds, third vein 
bearing two or three bristles at the base, second and third seg- 
ments of abdomen sometimes bearing discal macrochaetae ; 
Length, <> to 8 mm.: otherwise as in the above description of 
leucanice. Northern Illinois, Missouri, Colorado, and Mesilla, N. 
Mex. (first Kept Insects of Missouri, p. Ill; March, 1809: 
Lydella.) doryphorce liiley. 
6\ Middle tibiae each bearing two or more macrochaetae on the front 
side near the middle 7. 
Middle tibiae each bearing a single macrochaeta on the front side 
near the middle, sides of face below the lowest frontal bristles 
bare, arista thickened to the middle, the penultimate joint only 
slightly longer than broad, front in each sex one and one-fourth 
times as wide as either eye, frontal bristles descending below 
the arista, third joint of antenna* in the male six, in the female 
four, times as long as the second ; palpi yellow; length, 8 to 1) 
mm. Dist. Columbia, Bluffton, S. C, and Missouri. (In Scud- 
der's Butt. New England, Vol. Ill, p. 1922; 1889) .coinstocl'i Will. 
7. Sides of face below the lowest frontal bristles bare, arista thickened 
on the basal three fourths, the penultimate joint three times as 
long as wide, front in each sex one and one-fourth times as 
broad as either eye, frontal bristles descending below the arista, 
