2 PROCEEDINGS OP THE N^ATIONAL MUSEUM vol.69 



yellow. The venter is paler yeUow, except the basal part of the first 

 three segments. Legs yellow, the femora indistinctly vittate with 

 brown on the lower hind side. Hind tibiae brown, stouter than the 

 others and ending in two sharp but stout points. Palpi yellow, the 

 apical haK of the last joint black; claws black; pulvilU yellowish. 

 Wings hyaline, third vein with a branch near tip forming two sub- 

 marginal cells; first posterior cell with a cross vein joining the third 

 vein a Uttle before its fork. The extra cell thus cut off is closed 

 before the margin. Five posterior cells present, the veins separating 

 them all extending to the margin ; fourth posterior and anal closed 

 before the margin. 



Length, 8.4 mm. 



Described from one male collected at Port au Prince, Haiti, by 

 G. N. Wolcott. 



Type.— Male, Cat. No. 28908, U.S.N.M. 



Family MILICHHDAE 



MICROSIMUS, new genus 



Nearest to NeopJiyllomyza, but has the front broad and swollen, 

 the eyes small, the antennae considerably separated at base by the 

 lunule, which is bristly; terminal joint of proboscis not so elongate 

 and slender; several bristles on cheek near vibrissa. 



Head broad and short, deeply concare behind, so that the vertex 

 forms a rather sharp rim. The broad front consists of \vdde para- 

 frontals and a large ocellar triangle, which are connected by a nar- 

 row area of less striking structure. Besides the two verticals (the 

 outer divergent, the inner convergent) there are three upper frontals 

 divergent and two or three lower convergent, all some distance from 

 the eye; the convergent post verticals are large and strong, the ocel- 

 lar divergent. The ocellar triangle reaches nearly to the lunule and 

 bears a few rechnate hairs anteriorly. The lunule is broader than 

 usual but mostly concealed above; it bears two proclinate bristles 

 at its upper edge which have the appearance of being on the front. 

 The antennae are separated at base and strongly bent laterally, the 

 second joint as long as the third, both somewhat enlarged in the male; 

 third joint round, arista short plumose. Palpi much enlarged, hairy; 

 proboscis with terminal joint distinctly bent back and slender in the 

 male, much less so in the female. Eyes microscopically pubescent, 

 smaller in the male than in the female, the cheek being fully equal to 

 the eye height in the male, but only half the eye height in the female 

 Chaetotaxy of thorax: Acrostichal, 1; dorsocentral, 2; humeral, 2; 

 posthumeral, 1 ; presutural, ; notopleural, 2 ; supraalar, 2 ; intraalar 

 0; postalar, 2; scutellum, with two pairs; prothoracic, 1; mesothoracic^ 

 0; stemopleural, 0, 1. The disk of the mesonotum is covered with 



