Sibinia. | RHYNCHOPHORA. _ 3808 
i. Elytra with a large common yellowish-brown or 
brownish spot behind scutellum (usually contracted 
in middle). 
1. Antenne and anterior portion of rostrum more 
or less red; length 2-2 mm. . . S. ARENARIA, Steph. 
2. Antenne and anterior portion of rostrum black 
or pitchy; length13-2 mm... ....,.. 8. PRIMITUS, Herbst. 
ii. Elytra without a spot behind scutellum ; antenne, 
rostrum and legs red or ferruginous . . . . . S, SODALIS, Germ. 
(S. pellucens, Scop. (canus, Herbst.), Ovate, broad, black, upper 
surface clothed with greyish-white or greyish-yellow brown pubescence 
or hair-like scales, underside with white pubescence ; antenne pitchy at 
base, black towards apex ; rostrum stout, slightly curved, punctured, 
pubescent from base to the insertion of the antenne and from thence 
glabrous ; thorax shorter than its breadth at base, narrowed in front, 
sinuate at base, closely sculptured, often with a lighter central line ; 
elytra scarcely broader at base than thorax, with the shoulders elevated 
and rounded, and with narrow and obsoletely punctured striz, interstices 
flat, alternate ones sometimes lighter; legs stout, pubescent, black with 
the claws red, femora not toothed. L. 3-4 mm. 
On Lychnis dioica ; the larva undergoes its transformations in the seed capsules; 
very rare; two specimens were taken by Mr. Sidebotham early in June, 1864, by 
Sweeping in a lane between Devizes and Poltern, and another about the same time by 
Mr. Edleston at Knutsford, near Bowdon, in Cheshire. ) 
S. potentillz, Germ. Broad oval, black, upper surface thickly 
clothed with narrow piliform fawn coloured or reddish brown scales, 
variegated minutely with whitish scales, underside with broader whitish 
scales ; antenne dark, pitchy at base with the club globose ovate ; 
rostrum gradually narrowed in front, slightly curved; thorax mostly 
ferruginous, with the central line and sides lighter, transverse, with the 
sides rather strongly rounded, and much narrowed in front, closely 
sculptured ; elytra broad and ample, rather wider at base than base of 
thorax, sometimes almost unicolorous, but usually with the shoulders 
and a sutural band lighter ; legs dark or pitchy-red, pubescent. L. 
3-22 mm. 
a “4 
Sandy places; on Spergula arvensis, &e. (the Corn Spurry) ; local, but not 
uncommon where it occurs; Weybridge, Shirley, Woking, Esher, Caterham, 
Ripley, Wimbledon, Ashtead, Birch Wood, Belvedere, Horsell, Byfleet ; Windsor ; 
Ashwicken, Cambridge; Brighton; Shirley Warren, Southampton (abundant, 
Gorham) ; Portsmouth district (Moncreaff) ; Kidderminster (Blatch). 
S. arenariz, Steph. Oblong-ovate, black, with the base of the 
antenne, apical portion of rostrum, tibie and tarsi reddish ; upper surface 
thickly clothed with greyish-yellow scales, underside with a thick 
crust of whitish or greyish white scales; rostrum rather long, moderately 
curved, thorax about as long as its breadth at base, almost conical, 
constricted before apex, with two broad irregular reddish-brown or 
