Dlptera of St. Vincent (West Indies). 307 



Frontal triangle shining black, its inferior corners and the face 

 opaque silvery. Antennae black ; third joint on the inner, basal 

 portion yellowish. Cheeks, immediately below the eyes, shining 

 black, with black pile. Beard white ; occiput silvery grey. 

 Mesonotum with dusky yellowish pile, and black bristles ; on the 

 sides, shining black ; in the middle, with two broad, narrowly 

 separated, opaque, olivaceous grey stripes ; a narrow stripe between 

 the two, brown. Scutellum shining black, its apical margin opaque 

 grey, and with four bristles. Pleurae opaque greyish-white, with 

 white hair. Halteres brown. Abdomen silvery white, when 

 viewed from above ; the brown or black ground-colour predominant, 

 when seen from behind ; the first segment in the middle, and a 

 large spot on the anterior angles of the following segments, ex- 

 tending nearly to the posterior margin, black. Legs, for the 

 greater part, sordid yellow ; femora black ; the tip or distal portion 

 of the tibiiB, and the distal joints of all the tarsi, blackish. Wings 

 nearly hyaline ; stigma elongate. 



Four specimens. Seashore. 



EMPIDID^. 



Hybos. 



Meigen, Illiger's Mag.^ ii., 1803. 



1. Hyhos dimidiatus. (PI. XI., fig. 83, wing.) 



? Hyhos dimidiatus, Loew, Wien. Entom. Monatschr., 

 iv,, 36 (iiec Bellardi). 



Hah. Cuba. 



There are, in the collection, some twelve or more 

 specimens, which I refer very doubtfully to this species. 

 In the most typical, the chief differences from the 

 description are : The presence of black hairs on the 

 thorax, the darker colour of the front femora, and the 

 light-brown colour of the basal portion of the wings. 

 The distal portion of the wings is not hyaline, or even 

 cinereo-hyaline, but is distinctly infuscated. In some 

 of the specimens the wings are nearly uniform in colour 

 throughout. 



