346 SUPPLEMENT. 



a perceptible approximation. They have the front white, like the face, and the fore 

 coxae yellow at the tip for some distance. 



In still another male, from Mexico city, which probably belongs to a distinct species, 

 the eyes are decidedly contiguous, the tibiae and tarsi are blackish, leaving only the 

 fore and middle knees yellow, the femora have much longer hairs, and the pulvilli of 

 the fore feet are extremely large, with a distinct brownish cast. 



3. Diaphorus deceptivus, sp. n. 



d . Pace blackish, rather opaque, in the best-preserved specimens with a slight white pruinosity ; antennas 

 small, entirely black, arista almost exactly apical; eyes narrowly contiguous on the face; cilia of lateral 

 and inferior orbits white. Thorax globose, bright green above, the pleurae blackish, with thin grey dust ; 

 halteres yellow ; tegulae infuscated, their cilia blackish, but in certain lights yellowish. Abdomen dark 

 golden-green, with brown hairs on the sides and venter ; the usual apical bristles scarcely perceptible ; 

 hypopygium very small. Legs yellow, the middle and hind coxae infuscated for about half their length, 

 and the fore coxae sometimes a little infuscated at the base ; hairs all appearing yellow when viewed 

 against a dark background ; tarsi but little infuscated ; fore pulvilli rather large, the hind ones the 

 smallest. Wings yellowish, the veins brownish-yellow ; venation as usual. 

 2 • Pace cinereous ; front of the same colour, green in the middle ; cilia of the tegulae in some lights quite 



white. 

 Length 2-7 to 3 millim. 



Hah. Mexico, Omilteme in Guerrero, Medellin in Vera Cruz (H. H. Smith). 



Three males and five females. The hairs of the legs would be called black if 

 examined against a white background. The colour of the tegular cilia is peculiarly 

 obscure and misleading. D. deceptivus seems to be related to D. suhsejunctus, Loew, 

 of the West Indies ; but differs in having the front of the male obliterated by the 

 contiguity of the eyes, the cilia of the tegulae darker, and the posterior tarsi more 

 infuscated. These characters seem evanescent, and cannot be regarded as fully 

 establishing the validity of the present species. Loew's description in this case is 

 brief, and less satisfactory than would be expected of him. 



4. Diaphorus nigrescens, sp. n. 



d . Pace, front, palpi, and antennae opaque black ; front moderately narrow with parallel sides ; antennas 

 small, third joint especially so, arista almost exactly apical. Cilia of the inferior orbit yellowish. Thorax 

 opaque blackish, the dorsum a little shining behind, the scutellum moderately bright green. Halteres 

 yellow. Cilia of tegulae black. Abdomen blackish-green, the dorsum shining ; apical bristles distinct ; 

 hypopygium rather prominent for this genus, still not exserted. Legs opaque blackish, the fore ones 

 brownish, and all the knees very narrowly yellow ; pulvilli white, moderately enlarged. Wings uniformly 

 infuscated, not very dark, the veins at the base brown rather than black. Venation normal ; fourth vein 

 ending exactly in the tip. Length 3-1 millim. 



5 . Rather larger ; wings larger, broader, and darker ; face and front wider ; legs more uniformly black. 

 Length 4-1 millim. 



Hah. Mexico, Chilpancingo, Omilteme, and Sierra de las Aguas Escondidas in 

 Guerrero (H. H Smith). 



One male and three females. Except for the larger size and the separated eyes of 

 male, this species greatly resembles D. opacus, Loew. 



