LONGICORNIA. [Sdj 



Britain ; of these S. carcharias is one of our largest Longicorns, and S. 

 scalaris, when fresh, is certainly one of the handsomest ; the larvae of 

 our species are found in poplar, aspen, willow, &c. ; they are almost 

 parallel-sided, the prothorax being only a seventh part broader than the 

 eighth abdominal segment, and are furnished with very minute legs ; 

 the anal segment is trifurcate. 



I. Size very large ; elytra thickly clothed with grey or brown 

 pubescence, wit limit distinct bands or patches of a lighter 



colour S. CAECHABIA8, L. 



II. Size moderate ; elytra with distinct light bands or spots. 

 i. Thorax strongly depressed before middle and at base; 



disc almost smooth S. SCALAHIS, L. 



ii. Thorax very slightly depressed before middle nnd at base; 



disc closely punctured S. POPPLNBA, L. 



S. carcharias, L. (punctata, De G. ; s.g. Anarea, Muls.). One of 

 the largest and most conspicuous of the British Longicorns ; black, clothed 

 with yellowish or ashy grey pubescence, which is thicker and longer 

 on the under surface than on the upper, and is somewhat variable in 

 colour, so that the insect appears to vary from qiiite a light grey to an 

 ochreous yellow ; head large, antennae tapering, with the apical joints not 

 ringed with white ; thorax slightly transverse, coarsely and rugosely 

 punctured, with a central line and a tubercle on each side of it, which 

 are usually covered with pubescence ; scutellum large, semicircular ; 

 elytra broad, with well-marked shoulders, gradually narrowed to apex, 

 which terminates at suture in a short blunt spine, very coarsely and 

 deeply punctured, with a transverse patch of closer pubescence on each 

 about middle ; legs short and stout, pubescent, extreme apex of femora 

 usually black. L. 20-28 mm. 



Male with the antennae a little longer than the body, and the elytra 

 more narrowed behind ; female with the antennae a little shorter than 

 the body, the elytra slightly narrowed behind, and the fifth ventral 

 segment of abdomen with a fine channel towards base. 



In and about old willows ; local and, as a rule, confined to the fen districts, in 

 which formerly it was rather common ; Ely ; Sohiim and Wit-ken Fen, Cambridge ; 

 Lincoln ; Croncliff, near Scarborough (Wilkinson) ; also recorded from the Forest of 

 Dean ; Scotland, very rare, on aspen, Moray and Sutherland districts ; it probably 

 occurs along the whole of the eastern counties from Yorkshire to Norfolk. 



S. scalaris, L. A very handsome and conspicuous species, elongate, 

 subparallel, depressed, black, slightly shining, with the under-side densely 

 clothed with bright yellowish-green pubescence; head broad, thickly 

 clothed with bright yellowish-green pubescence, a spot at base being 

 denuded ; thorax transverse, coarsely and irregularly punctured, with 

 the disc and a spot at each side bare, the rest being clothed with the 

 same pubescence as head ; elytra considerably broader than thorax, with 

 the shoulders strongly marked, very slightly narrowed before apex, with 

 a strong scalariform line of bright yellowish-green pubescence (as on 

 head) running from base to apex, and several patches and spots of the 



