188 DIPTEROUS GENUS DIAPHORUS 



bristle-like hairs near the tip ; middle and hind femora with only- 

 delicate hairs below ; pulvilli of fore tarsi considerably enlarged, 

 those of middle and hind tarsi not enlarged. Halters and tegulae 

 pale yellow, cilia of the latter black. Wings grayish hyaline, a 

 little darker in front of the third vein ; veins black ; first vein 

 reaches about two-fifths the distance to the tip of the second. 



Female : Agrees with the male in color, and in the arrange- 

 ment of the hairs and bristles, but the fore pulvilli are not 

 enlarged. 



Described from four males and four females which I took at 

 Bradentown, Fla., in March. Type in the author's collection. 



31 Diaphorus dubius Aid. 



Diaphorus dubins Aldrich, Trans. Ent. Soc. of Lundon, Pt. 

 iii, p. 3-24. 



Male: Length 2.4-2.7 mm. Face and front green, of about 

 equal width, and thickly covered with pollen, but the ground color 

 showing through when viewed from in front ; antennae black, 

 small, third joint very short, rounded at tip ; arista apical. Thorax 

 bronze green, the posterior end and the scutellum pure green ; 

 dorsum with a trace of a coppery vitta in the center. Abdomen 

 metallic coppery, the bristles at the tip distinct in some specimens 

 and not so in others ; hypopygium small, its appendages scarcely 

 visible. Coxae and femora black ; trochanters and tips of fore 

 and middle femora broadly and hind femora narrowly reddish 

 yellow ; tibiae and the first joint of the tarsi yellow ; tarsi brown 

 from the tip of the first joint ; fore tibiae with a minute bristle on 

 top near the base ; middle tibiae with a large bristle near the base 

 on the front side ; hind tibiae with a few small bristles on the 

 upper surface ; fore and middle tarsi longer than their tibiae ; hind 

 tarsi a little shorter than their tibiae and with the second joint 

 only a little shorter than the first. Halters and tegulae yellow, 

 the latter with black cilia. Wings grayish hyaline ; first vein 

 reaching about one-third the distance to the tip of the second. 



The above characters are taken partly from the original 

 description and partly from a type specimen kindly loaned me by 

 Prof. J. M. Aldrick 



St. Vincent, W. L, and also from Grenada. 



