198 LIST OF DIPTERA. 



grayish hue ; the wings also have a tawny tinge beneath the fore- 

 border at two-thirds of their length ; veins ferruginous ; poisers 

 tawny, with ferruginous knobs. Length of the body 4 lines ; of 

 the wings 8 lines. 



a. Florida. Presented by E. Doubleday, Esq. 



Chrysops approximans, n. s. Fulvus, capite subtus albo thorace 

 vittis duabus fulvescentibus, abdomine piceo utrinque maculato 

 subtusque fasciato, pedibus fulvis, tarsis et protibiis piceis, alis 

 limpidis fusco cinereo fulvoque variis. 



Head tawny, white behind and beneath : eyes green and red : 

 palpi tawny : sucker piceous, hairy : feelers bright tawny ; third 

 joint pointed, slightly curved, piceous towards the tip : chest bright 

 tawny ; most of its disk, excepting the scutcheon dull pale tawny, in 

 which colour two indistinct tawny stripes may be traced : breast 

 mostly hoary : abdomen tawny ; the segments from the third to the 

 seventh have a piceous spot on each side, and these spots pass more 

 or less interruptedly over the back ; under-side with a broad piceous 

 band on the fore borders of the segments from the fourth to the 

 seventh : legs tawny, and clothed with tawny hairs ; feet and tips of 

 the fore thighs pale piceous ; fore shanks and fore feet dark piceous : 

 wings colourless, tawny along the space between the fore border and 

 the longitudinal vein beneath, at whose tip they are brown ; the 

 cross-veins are also clouded with brown, and the tip of the wing has 

 the same colour, which passes into gray ss it approaches the hind 

 border ; veins tawny, piceous towards the tips ; poisers tawny. 

 Length of the body 3^ lines ; of the wings 7 lines. 



a. Florida. Presented by E. Doubleday, Esq. 



Chrysops convergens, n. s., fern. Fulvus, capite subtus albo, thora- 

 cis disco cinereo-fusco fulvo bivittato, pectore cinereo, abdomine 

 apice piceo, pedibus fulvis fusco-fasciatis tibiis tarsisque anticis 

 piceis, alis limpidis fusco et cinereo variis. 



Head tawny, white behind and beneath : eyes green and purple : 

 feelers bright tawny; third joint brown towards the tip : palpi and 

 lancets tawny : sucker piceous : chest tawny ; its disk, excepting 

 the scutcheon, grayish brown, and having two indistinct tawny 

 stripes : breast mostly gray : abdomen tawny ; last segment and 

 sides of the preceding one piceous : legs tawny ; fore shanks and 

 fore feet dark piceous ; middle shanks and base of middle feet pale 

 tawny, rest of middle feet pale ferruginous ; hind feet, excepting 

 the base, reddish brown, and there is a broad band of the same co- 

 lour round each hind shank : wings colourless, the tawny stripe 



