EHAPHIUM. 197 



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

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

 his genus Porphi/rops, in which the third joint of the auteunse 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 follovi-ing joint, the 

 pubescence at the tip of the middle coxae sometimes elongated, 

 as a compact pencil or spur, in the male. 



4. fasciatum, Mg. ! zw. iv. 31. 9 (1S24); Mq. ; Ztt.; Lw. 

 Ni[/7-o-ceueuin , nltldum, fronte violacea, pecUbus Jlavis, femoribus posticis 

 muticis, coxis Jlavis, seiis nigris anterionim binis p)Ostlcarum unica ; 

 Mas. autennis thorace longioribus, arista brevissima, abdominis segmentis 

 secundo tertioque fascia fiava. Loug. 1 ; alar. 1\ liu. 



Br assij -black, sldning. Front violet. Face silvery-white. AntennrB 

 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 hypopygiam as long as the inner, oblong, 

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

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

 dusky at the tip ; tibiae with tlie 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- 

 stcdt, ditfering in this from Macquart's description. 



Rare. (E. I.) 



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

 inacrocerum , Hal. — Foem. nemorale, Mg. ? — palliturse, Mq. Atro- 

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

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

 biis, arista brevissima, genubus tibiis tarsisque posticis uigricantibus, 

 appendicibns externis hypopygio non longioribus, internis capillo arcuato 

 glabro terminatis. Long, l-j-lf ; alar. 3-3^ lin. 



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

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

 attemiated 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 tvith a long, simple, curved, pale hair ; outer ofies short, dilated, 

 voraeriform, dusky, pubescent. Legs pale yelloio, posterior cox;e grey 

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

 t'q), with the tibia) and tarsi, blackish-brown, the tibiee souictimes 

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

 very sbghtly dilated at the tip ; black Imstles of the coxce 3:2:1. 



