GENUS TRICHOPROSOPON 367 



the length of the proboscis ; pleura and coxie marbled with golden and 

 dark brown. Legs yellowish-brown, all the femora with a sub-apical 

 spot on their outer sides, especially prominent in the fore legs ; hind 

 tibiaj, paler at base, dark at apex, with a distinct white ring in the 

 middle. Wmg with " 2 " || "3," but angulated ; "4" placed twice the 

 length of " 3 " internal to them. Halteres with white stem and golden 

 knobs. Length. — About 6 mm. 

 Habitat. — Honduras. 



Genus XI. TRICHOPROSOPON (Monog. II, p. 284). 



This genus has been instituted by Mr. Theobald for the recep- 

 tion of a single species. Tr. nivipes sp. ct gen. nov., which presents 

 the peculiarity of having the metanotum provided not only with 

 a tuft of* bristles but also with patches of scales ; in addition 

 to which each antennal joint carries two whorls of hairs, a 

 long set near the base and a shorter, close to the apex. The 

 form and arrangement of the wing scales much resembles 

 Tceniorhynchus, but in other respects the species resembles more 

 a Janthinosoma, while the proportionally long female palpi recall 

 those of Psorophora and Mucidus. 



Mr. Theobald defines the genus as follows : — 



" Head clothed with flat scales and having a ring of upright forked 

 scales across the back ; antennge fourteen-jointed in $ , the joints with 

 two distinct rows of verticillate hairs, one long and the other short, basal 

 joint of the antennae bristly. Palpi in the ? three-jomted, densely 

 scaled ; in the ^ four-jointed, the joints nearlj' equal, tapering, apex 

 spinose ; clypeus densely bearded with short bristles and long ones in 

 front ; proboscis long, scaly, and pubescent at the rather expanded apex. 

 Thorax covered with rather flat spindle-shaped scales ; prothoracic lobes 

 distmct, with flat scales ; scutellum with dense fiat spindle-shaped 

 scales ; metanotum ivitli a tuft of cheta' and with fiat scales on j^art of 

 its surface. Abdomen covered with fiat scales, and in the ? with the 

 apex very bristly ; in the ^ the basal lobes of the genitalia densely 

 scaled. Tarsal claws of the ? , small, equal and simple, in the <? , those 

 of the fore and mid legs unequal and simple, in the hind very small, 

 equal and simple. Wings densely scaled along the veins, with rather 

 broad flat scales, sonaewhat like those of Tceniorhynchus, but shorter ; 

 fork-cells rather long, ' II.' extending nearly to the base of the wing, 

 the anal cell very large, and the cross-veins arranged' alter natel}'.' " 



1. TRICHOPROSOPON NIYIPES, Theobald. (Monog. II, p. 285). 



Tarsi and legs nearly black, with the last two joints of the 

 hind, and last four of the mid legs all white. Thorax dark brown 

 behind, yellow in front and at the sides. Pleurse with a silvery 



