176 
Journal New York Entomological Society. 
[Vol. V. 
Length, 7-8 mm. Differs from all described species by the whitish markings 
of the thorax. Face, cheeks and front light yellowish, covered with a silvery-white 
bloom; a little less than posterior half of front abruptly velvety dark brown or black¬ 
ish, the anterior portion of front being more yellowish than the face. Antennae 
brown, the tip of second joint often with a yellowish tinge, and the third joint with a 
reddish-brown tinge. Occiput fuscous or blackish, with some thin blackish hairs. 
Thorax and scutellum soft velvety brownish-black, with a medain pair of rather 
closely approximated ashy-whitish vittae extending little more than half way or at 
most two-thirds way to scutellum, and with'silvery-whitish pollinose spots as follows: 
A round one on humeri, a transversely elongate one just back of humeri cleft and 
widened below and notched anteriorly; the whole posterior border of scutellum, 
widest in the middle; and two rather rounded spots, forming really one longitudinally 
elongate marking but divided by a suture, immediately in front of each lateral corner 
of scutellum. First abdominal segment soft brownish-black, with a few black hairs 
on sides; second segment black on basal half on sides, but on only front border in 
middle, and with a pair of transversely elongate narrowly coalesced oval black spots 
near hind margin, the rest of middle portion of segment being of a shade between 
fuscous and golden yellow, the posterior half of sides broadly deep golden-yellow, 
pollinose continued narrowly along hind border, the black of anterior lateral angles of 
segment with a patch of black hairs; third segment wholly deep golden yellow polli¬ 
nose, except a pair of large sub-lunate black spots rather deeply notched on outside, 
widened behind, reaching anterior margin, coalesced anteriorly, separated posteriorly 
by a golden-yellow median line running half way to front border, narrow hind border 
of whole segment golden-yellow; fourth and fifth segments wholly deep golden-yel¬ 
low, except a pair of well-separated median black spots near hind margin, those on 
fourth segment being of good size, those on fifth small and dot-like; sixth segment 
wholly deep golden-yellow; two segments composing anus blackish, with a silvery 
sheen. Legs blackish brown, the whole with a considerable silvery sheen especially 
the under sides of tibiae which are more yellowish, pulvilli and claws except the tips 
yellowish. Wings a little fuscous, the antero-basal half yellow. Halteres pale-yel¬ 
lowish. The black of abdomen has a slight olive tinge; and in old specimens the 
deep golden-yellow pollen sometimes becomes greased, and shows then only a black¬ 
ish color. 
TACHINID^E. 
Ocyptera euchenor Walk. 
Eleven specimens, Brownsville, as follows: One $ t June 22, on 
flowers of Lippia lanceolata Michx. The front in this specimen was not 
fully developed, indicating recent issuance from pupa. Six $ ’s and 
four 9’s, June 24, also on flowers of Lippia lanceolata. 
Length of $’s 8-9 mm.; of 9’s 8 j 4-9 mm. Although there is 
only one millimeter difference in the length of the $ ’s, there is a 
marked difference in their comparative size and stoutness. Nearly all 
of the specimens have the prevailing color of the abdomen red, but one 
9 has it more black than red. Most of the specimens, including all 
