ALDRICH : DOLICHOPODID.K OF GRENADA, W. I. 91 



hairs, somewhat like those of Diaphorus, but they are not blunt 

 at tip. Legs slender, yellow, with minute yellowish hairs; 

 tarsi rather elongate, last joint but little infuscated, the pulvilli 

 all rather large; middle coxa* considerably infuscated. Wings 

 rather slender. 



Length, 1.4 mm. One male. 



The name is intended to refer to the distinct interblending of 

 the characters of Diaphorus with those of Chrysotus. 



MEDETERUS. 



Fischer ile Waldheim, Notice, etc., 1819. 



Medeterus exiguus, n. sp. 



Male : Minute, greenish black, the tibiae, tarsi and tips of 

 femora yellow, hind metatarsi less than half the length of the 

 following joint and noticeably thicker than it ; antennae black, 

 minute ; face and the minute palpi black. Hypopygium black, 

 elongate, slender, reaching the hind coxae. I cannot make out 

 the lamellae. Only the apical joint of the tarsi infuscated. 

 Wings hyaline, posterior cross-vein more than its length from 

 the margin, third and fourth veins distinctly convergent. 

 Halteres pure yellow. Bristles of the thorax brownish, almost 

 yellow in some lights. 



Female : Hind metatarsi as in the male, but slightly infus- 

 cated at tip. Face rather blue above. 



Length, 1.4 mm. One male, one female. 



CHRYSOTIMUS. 



Loew, Neue Beitr., V, 48 (1824). 



Chrysotimus barbatus, n. sp. 



Male : Face broad, gray, with a distinct transverse angle or 

 suture, just above which are two distinct hairs nearly as large 

 as those of the orbit ; palpi small, dark ; front gray ; antennas 

 short, rounded, rather dark yellow, the arista dorsal. Dorsum 

 of thorax, pleura? and abdomen of a dull cinereous cast, with 

 rather pale hairs and bristles. Feet, including coxae and 

 posterior margin of pleune, yellow. Hind metatarsus less than 

 half the length of the following joint, with a fine, dense row of 

 pale hairs forming a brush in the shape of an arc of a circle on 

 the inner side at the tip. This is a cleaning or scraping organ 

 for the wings, body, and other legs, I take it. 



Length, 1.6 to 1.7 mm. Two females. 



