iJiptera of St. Vincent {West Indies). 399 



resemble those of H. lateralis , Loew, from Europe. I 

 doubt not that the species belongs wherever H. lateralis 

 doesj in fact, I am not quite sure that the species may 

 not be identical, for the deeper colour of the present 

 species seems to be the chief difference between them. 

 The cheeks cannot be called broad, nor the median carina 

 " warzenformig/^ 



Hydrellia. 

 Rob. Desvoidy, Myodaires, 790, 1830. 



1. Hydrellia jparva, n. sp. (PI. XIIL^ fig. 143^ wing.) 



^. Front broad, distinctly broader than long, somewhat 

 flattened above the antennae ; opaque brownish-black. Antennae 

 short, the first two joints blackish, the third blackish above, some- 

 what reddish below. Arista with six long pectinations on the 

 upper side, and two or three short ones distally below. Eyes very 

 closely pubescent. Face opaque, a little more greyish than the 

 front; in the middle below with a moderate convexity ; on the 

 sides below with two or three bristles. Clypeus narrow. Cheeks 

 narrow ; below the eyes with a long, stout bristle, and a smaller 

 one further back. Thorax short, rounded ; black, but thickly 

 covered like the front with brownish-greyish dust ; on the pleurae 

 more greyish. Halteres light-yellow. Abdomen black, but little 

 shining, thinly greyish-dusted. Legs black ; all the tarsi, except 

 the terminal joint or joints, yellow. Wings greyish hyaline, with 

 stout black veins ; neuration as in the figure. Length 1 mm., or less. ^ /%t^^ 



One specimen. St. Yincent. This species belongs ^f^ 

 doubtfully in this genus. The pubescence of the eyes is 

 exceedingly short and erect, visible only under the 

 highest magnification. 



\V 



Vw 



^^^^ 



^. Hydrellia pulchra, n. sp. (PL XIII., fig. 144, wing.) 



<? . Front opaque black, the narrow orbits and the margins of 

 the large vertical triangle grey. Antennae yellow ; third joint 

 large, longer than wide, convex on its lower border, nearly straight 

 above, its upper half black; arista with seven or eight pectinations. 

 Face opaque yellowish-grey ; much narrowed a little above its 

 middle, with a slender groove running downward from each an- 

 tenna on the cheek ; between the grooves the narrow space is con- 

 vex ; below on the sides with two or three fine bristles. Eyes 



