121 
Third vein bearing only two bristles at the base, front of the male 
one and one-half times as wide as either eye ; yellow, the third 
antennal joint, proboscis, center of dorsum of thorax, three 
spots on the pleura, and a dorsal spot on the third and fourth 
segments of the abdomen black; frontal bristles descending 
almost to apex of second antennal joint, third antennal joint 
twice as long as the second, arista thickened on the basal third, 
cheeks nearly one-half as wide as the eye height, proboscis slen- 
der, rigid, labella very small; second and third segments of abdo- 
men bearing marginal macrochaetae, the fourth covered except 
on the basal third; wings hyaline, calypteres white; front pul- 
villi slightly shorter than the last tarsal joint; length, 11 mm. 
Denver, Colo. A single male specimen. Type in U. S. National 
Museum pallidum n. sp. 
3. Scutellum yellow, four postsutural and four sternopleural macro- 
chaetae; black, the first two joints of the antenna 1 , the palpi, 
scutellum, and sides of the last three abdominal segments, also 
the apex of the fourth, yellow; front in female slightly wider 
than either eye, frontal bristles descending almost to tip of 
second antennal joint, antenna 1 nearly three-fourths as long as 
the face, the third joint one and one-fourth times as long as the 
second, arista thickened on the basal three -fifths, the penulti- 
mate joint one and one half times as long as wide; head at base 
of antenna 1 slightly shorter than on its lower edge, vibrissa? 
inserted about half the length of the second antennal joint 
above the oral margin, three or four bristles above each; thorax 
gray pollinose, marked with four black vittae ; scutellum bearing 
four pairs of rather long marginal macrochaetae ; abdomen thinly 
gray pollinose, second segment bearing a pair of marginal ma- 
crochaetae, the third bearing a marginal row, the fourth covered 
except on the basal fifth; middle tibiae each bearing two long 
macrocha?ta3 on the front side near the middle, the hind tibiae 
outwardly subciliate; wings hyaline, third vein bearing about 
four bristles near its base, the others bare, apex of third vein mid- 
way between tip of second and the extreme wing tip, hind cross- 
vein at last third of distance from the small to the bend, the 
latter not appendiculate; calypteres white; length, 8 mm. Siski- 
you Co., Cal. A female specimen bred from Melitcea palla by 
A. Koebele. Type No. 302G, U.S. National Museum. melitwwii.SY*. 
Scutellum black, probably four postsutural macrochreta 1 , but the 
anterior pair is wanting in the type specimen, four sterno- 
pleurals; black, the palpi, sides of first three segments of abdo- 
men except the front corners, tibia 1 , and apical third of under 
side of each femur yellowish; front of male one-half as wide as 
either eye, no orbital bristles, frontals descending to middle of 
second joint of antennae, cheeks one third as broad as the eye- 
