OF WASHINGTON. 173 



Frontera, Tabasco, Mexico. A female specimen collected at 

 light,' April 30, by Mr. C. H. T. Townsend. 

 Type. No. 8014, U. S. National Museum. 



Phthiria marginata, n. sp. 



Head yellow, a spot on either side and another above the insertion of 

 the antennae, an ocellar dot, and center of the occiput, black; antennae 

 and mouth parts black, antennas formed as in fulvida, proboscis a little 

 over twice as long as the head, palpi very slender, only slightly dilated 

 toward the apex, reaching slightly beyond apex of second antennal joint. 

 Body black, opaque, gray pruinose, sides of mesonotum, spots on the 

 pleura, the scutellum except a median vitta which is dilated at the base, 

 and the hind margins of the abdominal segments both dorsally and ven- 

 trally, yellow; mesonotum with a pair of whitish pruinose vittae near the 

 middle, hairs of body whitish. Legs dull yellowish, apices of tibiae and 

 the tarsi except their bases, brown. Wings hyaline, stigma grayish, last 

 two sections of fifth vein of nearly an equal length. Length 3 mm. 



Pecos, New Mexico. A female specimen collected on Sep 

 tember 4 by Prof. T. D. A. Cockerell. 



Type. No. 8015, U. S. National Museum. 



Phthiria vittiventris, n. sp. 



Head and its members as in marginata except that the black of the occi 

 put is more extended and at the upper corners sends a spur to each eye, 

 while the proboscis is over three times as long as the head. Body black, 

 the sides of the mesonotum, a large spot in front of the scutellum, several 

 spots on the pleura, the scutellum except a line below the outer edge, a 

 pair of broad subdorsal vittse on the abdomen, and the middle of the venter, 

 yellow; mesonotum opaque, grayish pruinose and with a pair of whitish 

 pruinose subdorsal vittae, black of abdomen somewhat velvety, hairs of 

 body chiefly yellowish. Legs yellow, the front and hind femora except 

 their ends, the apices of the tibue, and the tarsi except their bases, brown. 

 Halteres yellow. Wings hyaline, last two sections of fifth vein of nearly 

 an equal length. Length 2 mm. 



Pecos, N. M., Aug. 29 (T. D. A. Cockerell) ; Las Vegas Hot 

 Springs, N. M., Aug. 3 (H. S. Barber). Two female specimens. 

 Type. No. 8016, U. S. National Museum. 



Phthiria nubeculosa, n. sp. 



Head yellow, a spot on either side of the antennae, another on posterior 

 half of each cheek, an ocellar dot and the center of the occiput, black; 

 antennas black, the first joint chiefly yellow, slightly longer than the sec 

 ond, each wider than long, the third elongate-oval, about three times as 

 long as the first two. deeply emarginate at the apex; mouth parts black, 

 proboscis slightly over twice as long as the head, palpi considerably 

 enlarged toward the apex, almost reaching the tip of the antennae. Body 



