LIST* OF DIPTERA. 295 



than the body: feelers dark tawny; first and second joints very 

 short ; third joint linear, rather broader than the first and the 

 second, and much more than twice their length : chest with a broad 

 yellowish white stripe on each side, and some slight traces of stripes 

 on the back : breast partly ferruginous : abdomen with a yellowish 

 white band on the hind border of each segment: legs tawny ; feet 

 and tips of the shanks piceous ; wings slightly gray, each with nine 

 or ten brown spots ; fore borders brown from the middle to the tips ; 

 wing-ribs and veins piceous, the latter black towards the tips ; poi- 

 sers yellow. Fern,— Like the male, but of a bright tawny colour 

 where the male is brown : abdomen dark tawny ; bright tawny 

 at the base : legs paler : wings with fewer and smaller spots. 

 Length of the body f— If line ; of the wings 2^—6 lines. 

 a. Georgia. From Mr. Abbot's collection. 



Geron, Hoffmansegg. 



Geron holosericeus, n. s., mas. Niger, pilis albis cinereisque yesti- 

 tus, antennis pedibusque nigris, tibiis ferrugineis, alis limpidis. 



Body black : head thickly clothed with white hairs behind, and 

 adorned with silvery down on the front: eyes red : lip black, more 

 than half the length of the body: feelers black; first and second 

 mints clothed with pale yellow hairs ; second joint not halt the 

 length of the first; third joint spine-shaped, or tapering from the 

 base to the tip, much longer than the first and the second joints : 

 fore part of the chest very thickly clothed with long hoary hairs : 

 abdomen covered with short gray hairs : legs black, oeset with 

 short black bristles ; shanks dark ferruginous, black at the tips : 

 wings colourless ; wing-ribs ferruginous; veins black, ferruginous 

 at the base ; poisers tawny, with bright yellow knobs. Length ot 

 the body 2i lines ; of the wings 5 lines. 

 a. Georgia. From Mr. Abbot's collection. 

 5 # . . ? From Mr. Children's collection. 



Usia, Latreille. 



Usia amea, Latr. Gen. Crust, iv. 315, J*. 15, /*. Meig Dipt ii. 

 226 2, pi. 18, /. 21. Maeq. Hist. Nat. Dipt. l. 383, I, pi. 9, 

 f. 11, 12. Volucella florea, Meig. Klass. Ziveif. i. 194, 1. 



a. France. 



2 D 8 



