BUFFALO SOCIETY OF NATURAE SCIENCES 191 



base of tarsi yellow ; fore pulvilli enlarged ; bristle at base of 

 middle tibiae very large. Wings tinged with yellowish. 



St. Vincent, W. I. 



36 Diaphorus variabilis n. sp. 



Male : Length 2.75-3.2 mm. Face not very wide, covered 

 with white pollen ; palpi yellow ; proboscis black ; front fully as 

 wide as the face, green, thickly covered with white pollen, which 

 is thinner towards the vertex ; antennae black, third joint 

 of moderate size, rounded at tip ; the long arista almost apical. 

 Thorax metallic green with gray pollen, which is thickest along 

 the front and sides of the dorsum and on the edges of the scutel- 

 lum : pleurae green with white pollen. Abdomen concolorous 

 with the thorax but with slight bronze reflections, especially along 

 the anterior and posterior edges of the second segment ; hairs of 

 the abdomen black ; bristles at tip distinct ; venter slightly yellow- 

 ish ; hypopygium very small, almost concealed, the' only visible 

 appendage is a rather long central filament. Fore coxae with 

 silvery pollen and short yellow hairs on the front surface and 

 black bristles at tip ; middle and hind coxae black with yellow 

 tips ; femora and tibiae yellow ; fore femora with a few bristle- 

 like hairs near the tip of the lower outer edge ; middle femora 

 with about four hairs on the front at tip ; hind femora with a 

 few longer hairs near the tip and a preapical bristle, which is not 

 very conspicuous, close to the tip on the outside ; fore tibiae with- 

 out bristles except a very small one on top near the base ; middle 

 tibiae with two bristles, one long slender one near the base on the 

 front and a very minute one near the middle on top ; hind tibiae 

 with several bristles on the upper surface ; all tarsi blackened 

 from the tip of the first joint ; front tarsi fully one and one-half 

 times as long as their tibiae and with their pulvilli enlarged ; 

 pulvilli of middle and hind tarsi only slightly enlarged. Halters 

 and tegulae pale yellow, the latter with yellow cilia. Wings 

 rather long and not very wide, grayish hyaline, veins brown, 

 yellow at the root of the wings ; first vein reaching a little more 

 than one-third of the distance to the tip of the second. 



Female : Two females that seem to belong here do not differ 

 from the male except that the middle coxae are nearly half 

 yellow. 



