DIPTERA. 81 



BiASTEs iNDicus, Plate 3, fig. 3. 



Mas. Nu/er, scutelli man/ine postico fnlvo dcntihus q ualuor fiilvis ornato, 

 anlennis piceis basi fulvis, pedibus fidvis, tarsis Jlavis, femoribus pos- 

 ticis piceis^ alis subcinereis ad costam apice fuscis. 



Male. Body black, dull, without hairs, but covered with very short 

 tawny down : face tinged with white : eyes bronzed, occupying the whole 

 upper side ; facets large above, very small in front : mouth tawny : feelers 

 pitchy, tawny at the base : chest long and narrow, convex, spindle-shaped ; 

 hind border of the scutcheon tawny, armed with four short tawny teeth : 

 abdomen elliptical, finely punctured, much broader but not longer than 

 the chest : legs tawny ; feet pale yellow ; hind thighs pitchy : wings pale 

 gray, brown beneath the tip of the fore border ; wing-ribs and brands 

 tawny ; veins strongly marked, in structure like those of Clitellaria, pitchy, 

 tawny along the fore border ; poisers pitchy. 



Fern. Eyes parted by a moderately broad interval, which is smooth 

 and shining ; all the facets very small : head very slightly lobed above on 

 each side behind the eyes. 



Length of the body 3 lines ; of the wings 5 lines. 



METABASIS, n. g. 



Caput anticum valde productum, conicum : antennis articulus lus 

 subfusiformis ; 2us obconicus, li longitudine ; 3us et sequentes arete co- 

 haerentes, articulum unicum fusiformcm 2o fere quadruplo longiorem quasi 

 fingentcs. 



Front of the head produced into a slender cone, which is as long as 

 the preceding part and bears the feelers on its tip : first joint of the feelers 

 nearly spindle-shaped ; second obconical as long as the first ; third, and all 

 the following forming a compound, indistinctly divided joint, nearly four 

 times the length of the second joint, and of a lengthened spindle-shaped 

 form. 



Metabasis rostu.\tls, Mas. 



Nujer, thoracis lalenbus viridi vittatis, scutelli margine postico ferrugiiieo 

 dentibusque duabtis ferrugineis armato, antennis 7iigris apice piceis, 

 pedibus f err iigineis, tarsis piceis, alis iiigro-fuscis. 



Body black, long and narrow, rather flat : head shining, tawny beneath ; 

 its cone slightly furrowed across : eyes red, nearly meeting on the crown, 



