326 DIPTERA OF NORTH AMERICA. [PART II. 



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



I 39 discifer Lw. 



46 \ 



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



side. 40 lobatus Lw. 



'Hind tibiae of the male with bristles of unusual length. 



41 setosus Lw. 



47 \ 



Hind tibiae of the male with bristles of ordinary length. 



42 incisuralis Lw. 



43. J>. dorycerus Loew. % . — iEneo-viridis, oculorum tegularumque 



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



busque saturate flavis. 

 % . Seta antennarum lamellifera, tarsorum anticorum articulis ultimis 



quatuor dilatatis, atris. 



9 • 



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



first two joints of the antennae, the fore coxae 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 lamellai The face more ochre-brown 

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

 black. Hypopygium black ; the lamella? of middling size, clingy 

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

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

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

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

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

 brown callus, and are blackened at the extreme tip on the insider 

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

 like, considerably longer than the following four joints together, 

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



