Diptera of St. Vincent (West Indies). 277 



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



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



longicorniSj n. sp. 

 The furcation of the fourth vein occurs beyond the cross- 

 vein 7 



7. Wings bare, or hairy at the tip only 8 



Wings hairy throughout, or nearly so 13 



8. Black species ; mesonotum shining thlrsltes, n. sp. 



Mesonotum not shining 9 



9. Abdomen opaque black, with a slender yellow median 



stripe and incisures lUuratus, n, sp. 



Abdomen without distinct markings 10 



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



tinctly separable 11 



Wings without distinct markings sequaXj n. ?p. 



1 1 . Wings with three blackish spots along the costa, the other 



markings pale or obsolete decor, 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 . phlehotumus, n. sp. 

 Dorsum of thorax with numerous, rounded, dark brown 



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



13. Deep black ; mesonotum shining pygmcBus, n. sp. 



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



1. Ceratopogon macuUthorax, n. sp. (PI. IX., fig. 36_, 



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 antennae yellowish-brown ; proboscis slender ; second 

 joint of palpi thickened. Antennae yellow, not as long as the 

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

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

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

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

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

 front and hind tibiae 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. 



