180 



DOLICHOPIDJJ. 



tapering to a point ; palpi a little shorter, oblong, not pointed. An- 

 tenna not as long as the head is broad, with third joint tapering, some- 

 what ovate ; the arista on its upper edge, about the middle, nearly 

 naked, the penultimate joint curved, scarcely half as long as the last, 

 still shorter in the female. Scutellum naked on the disc. Wings in 

 all the species sooty-brown ; the discal transverse vein distant from 

 the hind margin by more than its own length ; the subapical vein 

 nearly straight, converging towards the cubital, and ending a little 

 before the tip of the wing. Alulae with black fringe. Abdomen 

 conical, somewhat compressed behind ; sixth segment in male exserted, 

 short, glossy-tomentose, without bristles. Hypopyg'mm of male free, 

 large, compressed, blackish, with a pair of somewhat dilated, lanceo- 

 late, movable lamella, the other appendages fixed. Posterior femora 

 with a single spine in front near the tip; spines of the tibia3 not 

 numerous, scarcely any on the sides of the fore pair ; hind metatarsus 

 not spined, but little shorter than the next joint. In the male the 

 tarsi are sometimes partially dilated. The affinity of this genus is very 

 close with the Dolichopi of the second section which have the cilia of 

 the lower orbit pale. D. nigripennis, with its elongated proboscis, 

 forms the link between them. 



Of the three European species which Loew has distinguished, 

 only one has occurred in the British Islands. 



1. nigrocserulea, LI. gen. iv. 289 (1809); Mg. ; Lw. (nigro- 

 Cfcrulescens), Stg. Atro-virens, tibiis anterior ilus, posticarum basi, meta- 

 tarsisque anticisjlavidis, tar sis simplicibus. Long. 1^; alar. 3 lin. 



Metallic blackish-green. Face and palpi glossed with grey, more 

 yellowish-grey in male. Lamellas brown, blackish at the tip ; which 

 is attenuated, slightly denticulated and ciliated ; forceps prominent, the 

 arms dilated at the tip, and truncated. Coxse and femora olive-black ; 

 the tip of the femora, the trochanters and tibia, in the anterior pairs, 

 yellow-ferruginous ; fore metatarsus the same, tipped with black ; the 

 hind tibia ferruginous from the base to about the middle; the tarsi simple 

 in both sexes. 



Rare. (E.) 



Genus V HYDROPHORUS. 



HYDROPHORUS, Wlbg. act. holm, consp. 1844; p. Fin.; Ztt. Mede- 

 terus p., Mg. ; Mq. ; Ct. ; Hal. Dolichopus p., LI. ; Fb. ; Lhm. 

 Musc.a p., L. ; Spl. ; Fb. ; Gm. ; Ksi. ; Dnvn. 



Antenna articulo tertio brevi, arista dorsali deflexa. Oculi pubescentes, 

 distantes. Vena transversa margini proxima. Femora et tibia spinu- 

 losa. Hypopygium marts immersum, lamella inflexa subbiloba. 

 Eyes pubescent, distant in both sexes. Face bisected by a transverse 



line, the upper face longitudinally furrowed, the lower with a tubercle 



