Diptera of St. Vincent [West Indies). 291 



DiOTREPHA. 



Often Sacken, Cat. Dipt., xxviii., 1878. 

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

 three posterior cells ; no discal cell. Antennse sixteen-jointed, 

 simple. Rostrum projecting, nearly as long as tho head. Neck 

 slender. Mesonotum but little convex, elongate and slender ; 

 iretanotum elongate. Legs slender, distinctly pubescent ; tibia; 

 ■without spurs. Abdomen very slender ; male forceps obtuse ; 

 upper valve of ovipositor smal' and gently curved. 



1. Diotrepha miruhilis. fPl. X., figs. Go, wing; Goa, 



(?) Dl()ir<''])lia mirahilis, Osten Sacken, Cat. Dipt., 1878, 

 p. 220. 



(J, 9- Proboscis, palpi, a'ld mtenna? brownish. Antennpe 

 microscopically pubescent, and with verticils of short hairs ; in 

 length the antennae would reach to about the suture, if bent back- 

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

 yellowish-brown, 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 tibia; dark- 

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

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



Hah. St. Vincent, Georgia, Texas, Caba. 



Eight specimens. ''This species is abundant in forest 

 glen, 1000 feet, near a stream, Sept. Alights on the 

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



2. Diotrepla concinna, n. sp. (PI. X., fig. GG, wing.) 

 $ . Differs from 7'. viirahilis in the darker colour, the proboscis, 

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

 and in the absence of the brown tip to femora and tibise ; 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. 3G4. 



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

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



