324 Professor Aldrich on the 



(^. Face short, small, greyish pollinose ; antennaB small, 

 bfowaish, second and third joints short but rather large, with 

 almost apical arista. Eyes contiguous for a moderate distance ; 

 palpi and proboscis yellow ; cilia of inferior orbit white. Thorax 

 green, slightly dusted, the smaller bristles of a rusty reddish colour, 

 the larger ones at the tips the same, but black at base ; pleurae 

 blackish, grey-dusted. Halteres large, pure sulphur yellow, tegulse 

 brownish-yellow with yellow cilia. Abdomen shining bronze-green, 

 venter yellowish ; hairs of abdomen yellow, the apical bristles not 

 present ; hypopygium concealed, only some minute yellow appen- 

 dages visible. Coxas femora, tibiae and tarsi yellow, the middle 

 coxfe largely blackish at base and the tips of the tarsi a little 

 brownish ; bristles of tibiae extremely small and weak, except at 

 the tips of the posterior ones. Fore tai'si longer than tibise, pulvilli 

 enlarged ; pulvilli of middle tarsi scarcely at all enlarged. Wings 

 yellowish, with yellow veins, widest about the middle. 



$ . Front as wide as the face below, a little wider above, 

 shining green, with yellow dust below and at the sides ; thorax 

 shining green with yellow dust, the larger bristles scarcely reddish 

 at 'tip ; yellow hair of the abdomen rather dense near the tip ; 

 bristles of the posterior tibite larger than in the male ; pulvilli 

 small. 



Length 2-2" 4 mm. ; of wing, 2 mm. 



Numerous males and females. March to September. 

 Sea-level to 2000 feet. 



7. Dia'plioriis duhius, n. sp. 



Greenish-bronze, moderately shining ; eyes of male not approxi- 

 mated ; femora black, tibia yellow. 



$ . Face obscurely dusted with gi-eenish- white, parallel ; front 

 green, shining only in a band across the vertex, the remainder 

 yellowish dusted ; antennce black, the third joint very short, sub- 

 reniform, with apical arista; cilia of inferior orbit pale, palpi and 

 proboscis blackish, the former of ordinary size. Thorax bronze- 

 green, a little shining : the pleurte blackish, with white dust, more 

 conspicuous posteriorly ; halteres and tegulfe yellow, the tegular 

 cilia black. Abdomen bronze-green with a coppery reflection, 

 sometimes scarcely at all green ; its hairs are black, on the lower 

 side less so and longer ; the four stout black hairs at the apex are 

 well-marked in some specimens, in others not. Hypopygium con- 

 cealed, its appendages small and inconspicuous. CoxiB and femora 

 black, trochanters and tips of femora reddish ; the fore cox^ with 



