^i! DIPTERA OF NORTH AMERICA. [PART II. 



brown upon the apical half. Arista with :i comparathch long 

 and striking pubescence. Front covered with a snow-white dust. 

 Cilia of the inferior orbit black. Thorax and scutcllum metallic 

 violet; no hairs are perceptible upon the surface of the latter. 

 Alxhunen metallic dark preen. Coxa- and feet yellowish; middle 

 coxa- upon the outside with a gra\ ish streak. Tarsi from the lip 

 f)f the first joint gradually blackened. The usual n>\\ of l.risths 

 on the upper Ride of the fore tibiaMS extant and complete; the 

 single liristles. however, comparatively s'.iort. Cilia of the teguhe 

 lilack. Win ITS tinged with grayish-brown, n little more brown 

 towards the anterior margin; the third and fourth longitudinal 

 veins very slightly converging towards the end. 

 Hab. Middle Sta lex (Ostcn-Sacken.) 



9. G. Slllxlilatatiis LOEW. $ . Viridis, antcnnis nigris, coxis nijrri- 

 cantibus, anticarum apir> i><-<lH>us.|ii.> ilavis, m.iris tarsoruni auticorura 

 articulo ultimo depresso, subdilatato. 



Green; antannm black ; coxio blackish ; tip of the fore coxae and tli<> (Vc? 



yellow; the last joint of the fore tarsi of the $ flattened aud a littlo 



enlarged. Long. corp. (t.i:?. Long. al. O.ltt. 

 SYW. liymnoptcrnus sttbdilatatus LOKW, Neue Beitr. VOI, 31, 8. 



Metallic green, rather bright. Face covered with a whitish 

 dust. Antenna 1 entirely lilack; third joint short, rather rounded; 

 arista with a scarcely perceptible, extremely .-lion pubescence. 

 The cilia of the inferior orbit seem to be black; upon the scutH- 

 luin, besides the usual two bristles, a few small h.-irdly perceptible 

 hairs are inserted. The rather large lamella- of ihe Inpopygium 

 are more kidney-shaped than crescent -shaped, upon their lower 

 side lro\\nish-yellow, upon the tipper part brownish-black, closely 

 fringed with black bristle-like hairs; the interior a-pendages are 

 simple. The'' fore coxrc blackened as far as the middle, middle 

 and hind co\a> almost as far as the tip. Feet .yellow ish, a little 

 more slender than in the allied species. The hairs on the hind 

 femora are also blackish upon their under side, and more distinct 

 than in the related species. The usual row of bristles on the 

 upper side of the fore tibia- is extant, but the single bristles are 

 \ery short. Fore tarsi from the tip of the first joint strongly 

 infnscated. towards the tip !>!ack, very slender, but hardly longer 

 than the tibi:e. Their I'nM joint is as long as the two following 

 taki.Mi together; the !.:st joint is flattened and a little enlarge.;. 



