32 • [July, 



D. CLAVioEK, Stan. — I met witli this species each time I went to 

 Aberlady, in a wood, but unfortunately mistook it f oi' D. discifer, Stan., 

 which I caught commonly at Eannoch and Braemar. 



D. Wahlbergi, Zett. — This s^jecies is w^ell distinguished ' from 

 jD. phimipes, Scop., by its immaculate hind tibi« and pale base of hind 

 tarsi, by the absence of the dark line down the middle tibite, and the 

 darkened tip with a white spot at the side, and by the longer and more 

 feathered basal joint of the middle tarsi, which is as long as the other 

 four joints together, tlie whole tarsus being comparatively longer than 

 in -D. plumipes. I have caught it at Abbott's "Wood and The Plashett 

 in Sussex, near Three Bridges, and in Essex. It seldom associates 

 with D. plumipes. 



D. siGNATUS, Mg. — Walker seems to have correctly identified 

 Meigen's pemiatus, but does not seem to have noticed his signatus 

 (= argentifer, Lw\). The latter has the middle tarsi without any 

 feathering, but with the two last joints silvery in front, the antennae 

 black with only the base beneath yellow, and the liind tibise dark at the 

 tip, bearing near the base a peculiar brown spot. I have caught sig- 

 natus at Lyndhurst, Weybridge, and Aberdeen, and I think I have the 

 female from Braemar and Eannoch. 



D. mediicor:s^ts, sp. n. 



$ ?. Viridis, facie flavido-alhd, antennis suh-elongatis, articulo prima 

 suhtus luteo,fronte viridi, oculorum ciliis inferioribus flavis ; ahdominis in- 

 cisuris nigris ; pedibus flavis, coxis posteriorihus cinereis, tarsis nigris, an- 

 icrioribus hasiflavidis, tibiarum intei'mediarum apice infuscato, posticarum 

 nigro; alls sub-fuscanis, vena discoidali leviter flexuosd, ante apicem alee 

 excurrente. 



S , pedibus omnino simplicibus, hypopygii mediocris lamellis ovatis, mi- 

 noribus, sordide albidis, apice et supei^e iiigro-mai-ginatis ; costd 7ibi vena 

 sub-costalis excipit simplici. 



^ , facie albtdd, antennis breviorihus, pedibus magis tiiteis et abdomine 

 magis cupreo quam in mare. 



Slightly smaller than D. trivialis, Hal. Face whitish, with a yellowish tiuge ; 

 antennre rather long, the third joint being elongate, sub-acute, above as long as the 

 other two joints together, below considerably longer. The hypopygium shining 

 black, with more or loss grey tomentum, the ends of the outer lamellse considei*ably 

 split up, the upper edge more regularly ciliated, and more obscurely margined with 

 black. Legs yellow, front coxse all yellow, bearing several black bristles at their end 

 and numerous small black hairs on their disc in front, posterior coxa; grey, tro- 

 rha^itcrs yellow, logs quite simple, there being no long hrietle on the fi-oiit tibia; and 



