178 dolichopidvt:. 



long and rather narrow, light brownish ; the subapical and cubital 

 veins nearly parallel ; the costal vem in male tcith a hlack siceUiuy near 

 the base, not reaching to the junction of the sxibcostal. Lamellce dingy 

 yelloicish ; arms of forceps slender, the tip incurved and spatulate. Legs 

 yellotv ; coxce dushy ; tarsi duski/, metatarsi yellow with dusky tip ; hind 

 metatarsus not much shorter than the next joint ; the fore tibia?, be- 

 sides the two or three small spines in the upper half, are veiy minutely 

 pectinated, in front, along the outer edge, in the last two-thirds of 

 their length. 



Not rare. (E. S. T.) 



49. aerosus, Fin. dol. 15. 17 (1823); Mg. ; Mq. ; Stn. ; Hal.; 

 Stg. ; Ztt. Obscure viridis, j^cdibus flams, femoribus j)osticis svpra et 

 tarsorum articuUs exterioribus fuscis, alls subhyalinis, venis cubitali et 

 sxd)apicali parallelis ; Mas. laniellis et Jrypostomate niyris ; Fcem. Jiypo- 

 stomate caiio. Long. \\; alar. 3 lin. 



Bark metalllc-rireen . Front yellowish-grey. Tace in male narrow, 

 black, greyish at the mouth ; in female dull grey. Arista very finely 

 pubescent ; penultimate joint more than half the length of the last, in 

 male. TFings rather long, dark hyaline, the subapical and cubital veins 

 nearly parallel. Lamella dusky-black ; arms of forceps very slender, 

 subulate, with the tip incurved. Legs yellow; coxse dusky, fore pair 

 paler at the tip ; tarsi dusky, fore pair paler, metatarsi yellow ; the hind 

 femora, sometimes also the fore pair, brownish on the upper edge ; the 

 fore tibia more faintly pectinated than in the preceding. 



Common in shady places. (E. S. I.) 



In the rest, the lameilse are attenuated ; the inner appendages 

 lengthened, sometimes fringed at the tip with long pale hairs ; 

 the arista is nearly naked, the penultimate joint long in the 

 males at least; the subapical vein nearly straight, converging 

 slightly to the cubital ; the hind metatarsus not much more than 

 half the length of the following joint ; the disc of the scutellum 

 is naked in general, but D. nanus prepares the transition to those 

 last preceding. It might, perhaps, be better to place them with 

 Si/bistroma, as Stseger has done, I have followed Zetterstedt in 

 limiting that group to the species with the hypopygium of the 

 male light-coloured, and the cilia of the lower orbit whitish. 



50. nanus, Mq. emp. 66. 15 (1827). — minimus, Ztt. Obscure 

 viridi-cjenens, hypostomate albido, pedibus flavis, femoribus tibiisque pos- 

 iicis apice, tarsisqiie fuscis, ynetatarsis anterior ibus flavis ; Mas. lamellis 

 oblongisflavidis. Long. \\ lin. 



Dark brassy -green. Front a little hoaiy. Face s\\\er^ -white and 

 very narrow in male, yellowish-white in female. Scutellum very faintly 

 pubescent on the disc. Wings dark hyaline. Lamella dingy yellow, 

 oblong. Legs yellow ; posterior coxae dark grey ; a sjwt at the tip of 



