114 SERRICORNIA. [ Corymbites. 
C. holosericeus, F. (tessellatus, L., nec F.; Tactotomus holoseri- 
ceus, Kies.). Rather broad and depressed, dark brown, thorax and 
elytra clothed with patches of thick silky yellowish pubescence, which 
give the upper surface a strongly variegated appearance; head and 
thorax very thickly punctured, the latter about as long as broad, with 
sides rounded and narrowed in front, posterior angles carinate, blunt and 
scarcely prominent; antenne short, obtusely serrate from the fourth 
joint; elytra with sides rounded, broadest behind middle, finely striated, 
interstices very finely punctured; legs pitchy red or ferruginous; under- 
side black or dark pitchy brown. L. 8-9 mm. 
Male with the thorax a little longer and narrower than in female. 
Grassy places, by sweeping, &c.; occasionally under stones, on wet decaying oak 
apples, &c.; rather local, but widely distributed throughout England and Wales; 
less common further north; Scotland, rare, Forth district. 
C. weneus, L. (Diacanthus weneus, Latr.; Selatosomus, Steph.). One 
of our most conspicuous species; broad and convex, but with the elytra 
somewhat depressed on disc, glabrous and very shining; colour varying 
through a great number of shades, but most commonly eneous or bright 
blue; sometimes the head is blue and the elytra sneous; occasionally 
violet, greenish, or even bronze-black varieties occur; the colour of the 
legs also varies from black to clear red; head small, triangular, coarsely 
punctured and impressed; antenne rather short, black, obtusely serrate 
from the fourth joint ; thorax broad and ample, with sides rounded and 
narrowed in front, central furrow visible behind, posterior angles pro- 
jecting, strongly keeled, upper surface distinctly but not very closely 
punctured on disc, more closely at sides; elytra somewhat dilated 
behind middle, where they are broadest, with fine punctured striae, 
interstices broad, very finely punctured; the size also is rather variable. 
L. 10-14 mm. 
Male with the thorax a little longer and less dilated than in female. 
Under stones, especially in mountainous and hilly districts, in early spring; local ; 
Belvedere ; Birch Wood; Fakenham; common in Devon on high ground, Dart- 
moor, Drewsteignton, Blackdown, &c.; Llangollen, Barmouth, Penmaenmawr, and 
other Welsh districts; Malvern Hills (common at the end of April and beginning of 
May); Birmingham district; Cannock Chase; Sherwood; Church Stretton and 
Withington, Cheshire ; Dunham Park, Manchester ; not recorded by Bold from the 
Northumberland and Durham district; Scotland, local, Forth, Tay, and Dee 
districts. 
C. metallicus, Payk. (nigricornis, Panz.; Diacanthus metallicus, 
Latr.). Elongate, moderately convex, elytra rather depressed on disc, 
of an obscure geneous colour, often with a very slight greenish reflection, 
upper surface clothed with distinct but short yellowish, almost golden 
pubescence, which is not arranged in patches but evenly distributed ; 
head strongly punctured, antenne pitchy, rather slender, feebly serrate 
from the fourth joint inclusive; thorax convex, about as long as broad, 
with posterior angles projecting and carinate, distinctly and not very 
thickly punctured on disc, more thickly at sides; elytra about as broad 
