1889.1 426 



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 tibiae are rufous or testaceous 

 instead of yellow. 



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



S. SPraiFEMORATA, sp. 71. 

 $. Nigro-cinerea, fronte non-prominenti ; oculis suhcontiguis ; arista sub- 

 plumata; antennis paljnsqiie nigris ; thorace lineis quatiior nigris striata ; pedibus 

 nigris, geniciilis tibiisqtie ruficentibus ; femorihus spinolosis ; tihiis posticis pilosis. 



Long., 6 mm. 

 Head: forehead and epistorae 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- 

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

 pair) in front, but merging behind into iiTCgular 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. Scutellum 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 tibiae, rufous ; fore tibife pieeous. 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 tibiae 

 have two bristles on the outer side a little beyond the middle ; the hind tibiae 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 tibiae. 



S. ANCEPS, Zett. 

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

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

 S. communis, Desv., and S. ca-sia, 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 more nigrescent than he represents those of -S. 

 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). 



