426 [November, 



fore femora, the basal halves of the four hinder ones are black as well as the tarsi; 

 while the extremities of the posterior femora and the tibise are rufous or testaceous 

 instead of yellow. 



I found a single male of this species at Baslow, in Derbyshire, in July, 1887. 



S. SPIJSIFEMORATA, Sf. tl. 

 $ . Nigro-cinerea, fronte non-prominenii ; oculis subcontiguis ; arista sub- 

 plumata ; antennis palpisque nigris ; thorace lineis quatuor nigris striato ; pedibus 

 nigris, geniculis tibiisque ruficentibus ; femoribus spinolosis ; tibiis posticis pilosis. 



Long., 6 mm. 



Head : forehead and epistome unprojecting ; eyes subcontiguous ; frontal space 

 black ; antennae and palpi black ; the former with the style subplumose, the hairs 

 being longer on the upper than the under-side. Thorax covered with grey tomen- 

 tum, having four longitudinal black stripes, the outer ones straight (like the middle 

 pair) in front, but merging behind into irregular oblong black patches ; sides marked 

 with sinuous whitish lines, which extend to the bases of the wings ; medio-central 

 dorsal bristles four in number, behind the suture. Scutettum grey. 



Abdomen, cinereous, hairy, conico-cylindrical, with six triangular black spots, 

 two very small upon the first segment, and two larger ones on the second and third 

 segments ; anal segments with two moderate sized bilobed, flattened, subanal 

 processes. 



Wings tinged with yellowish-brown at the base and along the upper half ; veins 

 all stained with brown ; both transverse veins clouded ; third and fourth longitudi- 

 nal veins diverging somewhat from each other towards the apex, which lies almost 

 in the centre between their extremities ; transverse veins rather near together ; ex- 

 ternal one straight, but rather oblique. Calyptra yellowish-brown, fringed with a 

 yellow margin. Halteres pale yellow. 



Legs, with coxae and tarsi, black ; fore femora black, except at the apex, which 

 is red ; middle and hind femora with their basal two-thirds black, and the ends, 

 together with the tiblce, rufous ; fore tibise piceous. All the femora are furnished 

 beneath with a row of long and strong spines, which are arranged in two rows under 

 the hind ones. The fore tibiae have a single spine before the apex ; the middle tibise 

 have two bristles on the outer side a little beyond the middle ; the hind tibise are 

 very hairy, having a number of long and strong hairs of nearly equal lengths along 

 the whole outer surface, as well as numerous soft and shorter ones on their inner 

 sides. 



I received a single male of this well-marked species from Miss Prescott-Decie, 

 which she captured at Bontddu, North Wales, August 21st, 1888. It bears con- 

 siderable resemblance to S.fratercula, Zett., but differs essentially by having spinose 

 femora and hairy hind tibise. 



S. ANCEPS, Zett. 



Dr. Schnabl lately sent me some specimens similar to those of S. communis, 

 Desv., labelled S. anceps, Zett., and told me that, in his opinion, &. anceps, Zett., 

 S. communis, Desv., and S. ccesia, Macq., were the same. Zetterstedt's description 

 of S. anceps will apply very well to the females of S. communis, but the males of 

 the latter species are generally much moro nigrescent than he represents those of & 

 anceps to be, so, in my opinion, the name anceps should be rather considered synony- 

 mous with S. quadrum, F., than with S. communis, Desv. 



(To be continued). 



