Diptera of St. Vincent {West Indies). 397 



moderately cariuate on the upper part, with the cheeks and 

 occiput silvery-grey ; two moderately strong bristles on each side ; 

 oral cavity very large. Mesonotum opaque dark-brown : pleurae 

 opaque grey. Abdomen, like the rest of the body, black in 

 ground-colour, greyish-pollinose ; second, third and fourth seg- 

 ments of nearly equal length. Legs black ; the knees, base and 

 tip of the front and hind tibias, the middle tibiee wholly, and all 

 the tarsi, save the terminal joint, yellow. Wings cinereous 

 hyaline; third section of the costa two-thirds the length of the 

 second section. Length l|-2 mm. 



Five specimens. St. Vincent. This species is pecu- 

 liar in the very large oral opening, resembling the forms 

 placed in the vicinity of Ephydrci, from which, however, 

 it is distinctly separated by the presence of a spinous 

 bristle at the tip of the second antennal joint. 



4. Discocerina ohscura, n. sp. 



(J , $ . Antennae reddish-yellow ; third joint only a little longer 

 than wide, its upper margin, as also that of the second joint, some- 

 times narrowly blackish ; arista with five pectinations. Face black, 

 covered with fine white pubescence or dust, which does not wholly 

 obscure the ground-colour save in an oblique light. Front black, 

 but mostly concealed beneath fine yellow or brownish-yellow 

 pubescence. Thorax black, shining through the thin brownish 

 dust ; pleurje thinly greyish-dusted. Abdomen black, moderately 

 shining ; oval, the fifth segment of the male much longer than the 

 preceding one. Legs black, the tip of the tibise, the knees and the 

 tarsi light-yellow, the distal joints of the last brownish. Wings 

 greyish- hyaline ; second section of the costal vein a half longer than 

 the third. Length '2-2^ mm. 



Numerous specimens. St. Vincent. 



Arthyeoglossa. 



Loew, Neue Beitr., vii., 12, 1860. 



1. Arthyroglossa nitida, n. sp. (PI. XIII., fig. 142, 

 head of $ .) 



S T 9 ■ Front wholly shining black, flattened or depressed on 

 the anterior portion. AntenniB black, the third joint somewhat 

 reddish and pubescent ; arista with six rays. Face deep shining 

 black, gently convex transversely ; clypeus large, prominent, oval, 

 convex, shining black like the face. Face on the sides near the 

 TRANS. ENT. SOC. LOND. 1896. — PAKT III. (SEPT.) 27 



