LIST OF DIPTEKA. 349 



Dasypogon Cerco, n. s., fem. Fulvus, thorace ferrugineo, disco fiavo- 

 fusco, abdomine ferrugineo basi piceo apice nigro, antennis fulvis 

 apice ferrugineis, pedibus fulvis, alis fuscis. 



Head tawny : chest clothed with pale golden down above and 

 with whitish down beneath, piceous on the crown, beset with a few 

 short black hairs along the borders of the eyes ; clypeus armed with 

 a few tawny slender hairs and with two long tawny bristles : eyes 

 piceous, bronze here and there ; fore part flat, bright bronze, and 

 also distinguished by its larger facets ; first and second joints of the 

 feelers pale tawny, of nearly equal length, covered with a few short 

 tawny hairs ; second joint having also a long tawny bristle ; third 

 joint spindle-shaped, ferruginous, tawny at the base, as long as the 

 first and the second joints : lip black, shining, clothed at the tip 

 with short tawny hairs : palpi black, beset with black bristles : hy- 

 postoma tawny : chest pale ferruginous, yellowish brown and clothed 

 with tawny down on the disk, beset with two or three tawny bristles 

 on each side : breast tawny and clothed with pale tawny down : ab- 

 domen ferruginous, hardly narrower than the chest, but more than 

 twice its length, narrow and linear towards the base, broader and 

 spindle-shaped from thence to the tip, thinly clothed with very short 

 black hairs ; first and second segments short, piceous ; third and 

 following segments long, but successively decreasing in length ; 

 third segment with a cross furrow near the fore border ; fourth seg- 

 ment widening to the hind border ; fifth and following segments 

 black, with ferruginous hind borders : legs tawny, slender, thinly 

 clothed with very short black hairs ; knees and tips of shanks armed 

 with some pale tawny spines ; tips of feet piceous ; claws black, 

 tawny at the base; foot-cushions pale tawny: wings brown, rather 

 paler towards the tips and along the hind borders ; wing-ribs tawny ; 

 veins piceous, black towards the tips ; poisers tawny. Length of the 

 body 5 lines ; of the wings 8 lines. 



a. Hong-Kong, China. Presented by J. C. Bowring, Esq. 



Dasypogon Acratus, n. s. mas. Piceus, abdomine nigro, basi ferrugi- 

 neo, antennis piceis, pedibus ferrugineis, tarsis piceis, alis fuscis. 



Head piceous, beset with a few black hairs and bristles, which 

 are mostly beneath, having on the front a protuberance crowned 

 with two tubercles, from whence proceed two long black bristles : 

 eyes reddish bronze ; fore part flat, composed of large facets : 

 mouth black : feelers piceous, not longer than the head ; first and 

 second joints beset with stout black hairs; second joint a little 

 longer than the first; third joint oval, compressed, furnished with 

 a few short black hairs, rather longer than the first and the second 

 joints, and full twice their breadth: chest and breast piceous, 



