OF WASHINGTON. 95 



velvet black spot at each lower corner of the front ; antennae on the two 

 basal joints brown, the third joint yellow, elongate oval, arista very long- 

 plumose; body black, pleura tinged with yellow, apex of scutellum, base 

 of abdomen and greater part of the genitalia, yellow; thorax bluish gray 

 pruinose and marked with three brown vittai : abdomen polished, a pair 

 of lateral, gray pruinose spots on each segment ; legs and halteres whitish ; 

 wings hyaline, hind cross-vein broadly bordered with brown, last section 

 of fourth vein five times as long as the preceding section. Length 2 mm. 



A male specimen from Granada, Nicaragua. 

 Type. No. 7801, U. S. National Museum. 



Sapromyza triseriata, n. sp. 



Yellow, the last four abdominal segments each marked with three black 

 dots, the hairs and bristles black. Third joint of antennae noticeably 

 longer than wide, arista pubescent. Thorax yellowish pruinose, the 

 scutellum and abdomen polished. Wings grayish hyaline, unmarked. 

 Length 2 mm. 



A single specimen from Chinandega. Nicaragua. 

 Type. No. 7937, U. S. National Museum. 



Family ORTALIDyE. 

 Euxesta juncta, n. sp. 



Head and its members yellow, the occiput except the lower edge, also 

 the sides of the vertex and an ocellar dot, dark green, the hairs and 

 bristles as also the antennal arista, black ; thorax dark green, mesonotum 

 grayish pruinose; scutellum yellow; abdomen dark green, the first two 

 segments and base of the third yellow; legs yellow; wings whitish hya 

 line, marked with four brown cross bands, the first two are isolated, the 

 other two are narrowly connected along the costa and again by an oblique 

 streak near the middle of the first posterior cell; the first band is on a 

 line with the humeral cross-vein, the second is very broad and passes just 

 before the small cross-vein, the third passes over the hind cross-vein, 

 while the fourth band borders the apex of the wing to slightly below 

 apex of fourth vein; halteres yellow. Length 3 mm. 



A male specimen from Granada, Nicaragua. 

 7\pe. No. 7802, U. S. National Museum. 



Euxesta fenestrata, n. sp. 



Head yellow, the occiput except middle of upper part and the lower 

 edge, also the sides of the vertex and an oceilar dot, greenish black; an 

 tennae and mouth parts yellow, the labella brown; thorax dark green, 

 humeri reddish, scutellum yellow, abdomen reddish yellow, metallic, the 

 ovipositor blackish; legs, including the coxae, yellow; wings brown, the 

 base to proximal end of discal cell whitish hyaline except a brown cross- 

 band on a line with the humeral cross-vein, a. whitish, subtriangular spot 



