D'lptera of St. Vincent {West Indies). 277 



C. The posterior branch of the fourth vein arises before the 

 origin of the anterior cross-vein ; wholly deep black, 



loug/cornis, n. sp. 

 The furcation of the fourth vein occurs beyond the cross- 

 vein 7 



7. Wings bare, or hairy at the tip only H 



Wings hairy throughout, or nearly so lo 



8. Black species ; mesonotum shining ih/rsitrn, n. sp. 



Mesonotum not shining '.• 



0. Abdomen opaque black, with a slender yellow median 



stripe and incisures lititratu.s, n. sp. 



Abdomen without distinct markings 10 



10. Wings with distinct markings ; first and third veins indis- 



tinctly separable 11 



Wings without distinct markings sequax, n. sp. 



11 . Wings with three blackish spots along the costa, the other 



markings pale or obsolete . cZecor, n. sp. 



One blackish spot on the costa at the tip of the first vein, 



the other markings distinct 12 



12. Dorsum of thorax light opaque yellowish . phlehotuniK^, n. sp. 

 Dorsum of thorax with numerous, rounded, dark brown 



spots on a yellowish-grey ground . . maculHhorux, n. sp. 



13. Deep black; mesonotum shining pygmceus, xi. np. 



Thorax yellow or brownish-yellow lotus, n. sp. 



1. Ceratopogon maculitliorax, n. sp. (PI. IX., fig. o^, 



wing.) 

 $ . Wings hairy at the tip ; third vein contiguous with the 

 first, terminating at or near the middle of the wing ; fourth vein 

 with a prefurca, though indistinct ; metatarsi as long as the fol- 

 lowing joints together. Proboscis, palpi, face, front and basal 

 joint of antenna) yellowish-brown ; proboscis slender ; second 

 joint of palpi thickened. Antenna) yellow, not as long as the 

 thorax. Mesonotum opaque yellowish-grey, with numerous, small, 

 rounded, dark-brown spots on a yellowish-grey ground, hair not 

 abundant or long, yellow. Scutellum yellow on the sides, brown 

 in the middle. Halteres light yellow. Pleurae black and luteous, 

 lightly greyish pruinose. Legs yellow ; all the femora, and the 

 front and hind tibias with a broad blackish ring ; the immediate 

 tip of the femora also blackish. Wings with pale brown markings 

 with hyaline or whitish spots and streaks ; a spot at the tip of the 

 first and third veins blackish. Length 2 mn:. 



One specimen. 



