psilopus. 205 



scarce than in the male, if it has not been perhaps somewhat nibbed 

 off in the latter ; the whitish pubescence of the venter much shorter. 

 Feet of the same coloring as in the male ; the whitish pubescence 

 of the femora is much shorter, still upon their under side of 

 considerable length for a female ; upon the under side of the fore 

 femora, near the basis, there are also some stiff, nearly bristle-like 

 whitish hairs of a remarkable length. Pubescence and bristles of 

 the tibice generally like those of the male, still all bristles are not 

 so long, and upon the upper side of the fore tibiae, the alternating 

 shorter bristles are very small. Fore tarsi hardly once and a half 

 the length of the tibia) ; their first joint much longer than the 

 following taken together, fringed upon the upper side with a 

 regular row of short black bristles, upon the under side with only a 

 few still shorter black bristles ; the following joints of decreasing 

 length, from the second to the fourth brown, the fifth black. Middle 

 tarsi distinctly longer than the tibiae, not ciliated upon the upper 

 side ; the first joint distinctly longer than the four following taken 

 together ; the latter black-brown and of decreasing length. Hind 

 tarsi brownish-black, much shorter than the. tibiae, the first joint 

 hardly somewhat longer than the following taken together. 

 Wings as in the male, only somewhat shorter, also proportionally 

 less narrow. $ 



Hab. Middle States. (Osten-Sacken.) 



Observation. — Whether the distinctly darker color of the tarsi 

 of the 9 is only an accidental, individual deviation or not, cannot 

 be judged from a single specimen of each sex. 



2. Arista distinctly dorsal and not particularly elongated. 



a. Fore tibiae only in the % , fore and middle tibia? in the 9 > yellow. 



lO. P. clirysoprasius Walk. % and 9 . — Viridis, vel ex viridi 



chalybeus, nitidus, alis immaculatis, facie nuda. 

 % . Abdomine fasciis latiusculis nigris ornato, halterum nigrorum capitulo 

 fusco, pedibus nigris, tibiis anticis flavis, tarsorum intermediorum 

 articulo primo superne pilis erectis rigidis ciliato. 

 9 . Abdominis fasciis nigris, angustissimis, halteribus flavis, pedibus nigris, 

 tibiis anterioribus flavis. 



Green or greenish blue, shining ; wings without picture, face without 

 hairs. 



% . Abdomen with rather broad black bands ; knob of the black halteres 

 brown ; feet black, the fore tibiae yellow, the first joint of the middle 

 tarsi upon the upper side ciliated with upright stiff hairs. 



