KHAPHIUM. 197 



diminishing, while the arista increases in length, in the male, 

 lead on to those (species 11-17) which Meigen at first placed in 

 his genus Porphyrops, in which the third joint of the antennae is 

 lanceolate or ovate in the male, and little longer than in the other 

 sex, the subapical vein of the wing distinctly sinuated, and the 

 hind metatarsus scarcely shorter than the following joint, the 

 pubescence at the tip of the middle coxse sometimes elongated, 

 as a compact pencil or spur, in the male. 



4. fasciatum, Mg. ! zw. iv. 31. 9 (1824); Mq. ; Ztt.; Lw. 

 Nigro-ceneum, nitidum, f route violacea, pedibus flavis, femoribus posticis 

 muticis, coxis flams, setis nigris anteriorum lints posticarum unica; 

 Mas. antennis thorace longioribus, arista brevissima, abdominis segmentis 

 secundo tertioque fascia flava. Long. 1 ; alar. 2^ lin. 



Brassy-black, shining. Front violet. Face silvery- white. Antennae 

 in male longer than the thorax ; third joint strap-shaped, four times as 

 long as the arista. Wings smoky-hyaline, attenuated at the base, sub- 

 apical vein straight, parallel with the cubital. Abdomen with the 

 second and third segments, except the hind edge, transparent, yellow. 

 Outer appendages of the hypopygium as long as the inner, oblong, 

 yellowish, pointed and dusky at the tip ; inner ones nearly as in the 

 next two, but without the long hair at the tip. Legs pale yellow ; tarsi 

 dusky at the tip ; tibiae with the spines small and few, the fore pair 

 minutely pectinated outside ; all the coxae yellow, with black bristles 

 2:2:1, and the spur of the middle pair tipped with black. In the 

 female the abdomen is immaculate, according to Staeger and Zetter- 

 stedt, differing in this from Macquart's description. 



Eare. (E. I.) 



5. caliginosum, Mg. ! zw. iv. 29. 4 (1824) ; Mq.; Ztt. ; Lw. 

 macrocerum, Hal. Fcem. nemorale, Mg. ? pallitarse, Mq. Atro- 

 virens, nitidum, fronte cyanea, pedibus Jlavis, femoribus posticis muticis, 

 coxis anterioribus bisetis posticis unisetis ; Mas. antennis thorace longiori- 

 bus, arista brevissima, genubus tibiis tarsisque posticis nigricantibus, 

 appendicibus externis hypopygio non longioribus, internis capillo arcuato 

 glabro terminatis. Long. 1-^-lf ; alar. 3-3^ lin. 



Metallic blackish-green. Front steel-blue. Face silvery-white. An- 

 tenna of male longer than the thorax ; third joint strap-shaped, a little 

 attenuated at the tip ; arista not longer than that joint is broad. Wings 

 brownish, subapical vein slightly sinuated. Inner appendages of hypo- 

 pygium much dilated at the tip and thickly fringed with pale hairs, 

 and ending with a long, simple, curved, pale hair ; outer ones short, dilated, 

 vomeriform, dusky, pubescent. Legs pale yellow, posterior coxae grey 

 outside ; in the hind pair the upper edge of the femora towards the 

 tip, with the tibiae and tarsi, blackish-brown, the tibiae sometimes 

 lighter ; the anterior tarsi dusky towards the tip, the fore metatarsus 

 very slightly dilated at the tip ; black bristles of the coxa 2:2:1. 



