Dlptera of St. Vincent [West Indies), 291 



DiOTREPHA. 



Osten SackeDj Cat. Dipt., xxviii., 1878. 



Wings very slender ; great cross-vein near their proximal third ; 

 three posterior cells : no discal cell. Antennre sixteen-jointed, 

 siniple. Rostrum projecting, nearly as long as the head. Xeck 

 slender. Mesoaotum but little convex, elongate and slender ; 

 metanotum elongate. Legs slender, distinctly pubescent ; tibiae 

 without spurs. Abdomen very slender ; male forceps obtuse ; 

 upper valve of ovipositor smal' and gently curved. 



1. Blotreplia mlrahdis. (PL X., figs, (jo, wing; 65a, 



hypopygium.) 



(?) Diotrepha mirahUls, Osten Sacken, Cat. Dipt., 1878, 

 p. 220. 



(^, 5- Proboscis, palpi, a-^d putenn^e bro-vrnish. Antennae 

 microscopically pubescent, and with verticils of short hairs : in 

 length the antennae would rea^h to about the suture, if bent back- 

 wards. Thorax yellowish-brown, or brownish-red. Abdomen 

 yellowish-browu, the posterior margins of the segments, or, the 

 posterior segments, wholly brown ; in some specimens the abdomen 

 is deep brown throughout. Legs light yellow ; the tibiae and the 

 tarsi more nearly white ; the tip of all the femora and tibiae dark- 

 brown. Wings nearly hyaline ; a fringe of hairs along the 

 posterior margin. Length of body, 7 mm. ; of wings, 5 mm. 



Sah. St. Yincent, Georgia, Texas, Cuba. 



Eight specimens. ^* This species is abundant in f.'irest 

 ^len, 1000 feet, near a strearn, Sept. Alights on the 

 lower side of Icaves.^^ — H. H. Smith. 



2. Diotrepha concinna, n. sp. (PI. X., fig. ^Q, wing.) 



$ . Differs from T. viirahijt>; in the darker colour, the proboscis, 

 palpi, and antennas being blackish ; in the legs being light yellow, 

 and in the absence of the brown tip to femora and tibi^ : and in 

 the neuration as shown in the figure. The wings are uniformly 

 and distinctly tinged with brown. Length 6 mm. 



One specimen. Sea level. 



MONGOMA. 



Westwood, Trans. Ent. Soc. London, 1881, p. 364. 



Antennae sixteen-jointed, if bent backward, reaching about to 

 the base of the wings ; second joint a little shorter than the first, 



