326 DIPTERA OF NORTH AMERICA. [PART II. 



f The first joint of the antennse red on the under side only. 



39 discifer Lw. 



46 ^ The first joint of the antennae red, with the exception of its upper 

 side. 40 lobatus Lw. 



f Hind tibise of the male with bristles of unusual length. 



41 setosus Lw. 

 j Hind tibise of the male with bristles of ordinary length. 



42 incisuralis Lw. 



43. D. dory cerus LOEW. $ . yEneo-viridis, oculorum tegularumque 

 ciliis nigris, primis duobus antennarum articulis, coxis anticis pedi- 

 busque saturate flavis. 



$ . Seta antennarum lamellifera, tarsorum auticorum articulis ultimis 

 quatuor dilatatis, atris. 



9 



Metallic green ; cilia of the posterior orbit and of the tegulse black ; the 

 first two joints of the antennae, the fore coxse and the feet saturate-yellow. 



. Arista expanded into a lamella at the end, the last four joints of the 

 fore tarsi enlarged, deep black. 



9 



Long. corp. 0.26. Long. al. 0.26. 



SYN. Dolichopus dorycerus LOEW, Berl. Ent, Zeitschr. VIII, 93, 85. 



Male. Bright, bronze-green, usually with extensive coppery- 

 red reflections. Antenna? small ; the first and second joints, 

 which are very much obliterated, of a saturate-yellow color ; the 

 third joint, which is round, and the arista, black ; the latter bears 

 at its tip an elliptical black lamella. The face more ochre-brown 

 than ochre-yellow ; the cilia on the posterior orbit altogether 

 black. Hypopygium black ; the lamellae of middling size, dingy 

 white with a rather broad black margin, jagged on the edge and 

 beset with black bristles, on the upper margin with black hairs. 

 Fore coxse with black hairs. Feet saturate-yellow ; hind femora 

 before the tip usually with two, sometimes with one bristle ; the 

 hind tibiee have upon their hind side, before the middle, a small 

 brown callus, and are blackened at the extreme tip on the inside. 

 Fore tarsi about as long as the tibise ; the first joint slender, stalk- 

 like, considerably longer than the following four joints together, 

 dark yellow, blackened only at the extreme tip ; the following 



