HETEROMERA. 39 



as long as the fourth ; the head is rather strongly but not suddenly and 

 sharply constricted behind the eyes the maxillary palpi have the last 

 joint rather long and cultriforra, and the last joint of the labial palpi is 

 lunate ; the lateral margin of the thorax is broad and somewhat ele- 

 vated ; the legs are long and slender, with the penultimate joint of the 

 tarsi strongly bilobed. 



The larva and pupa of C. testaceus are described and floored by Schiodte (xi. 

 pp. 573, 587, t. xvii. tigs. 16, 24) ; the larva is somewhat cylindrical, almost parallel, 

 about eight times as long as broad, membranous, with the hea<l, leg-*, and apex of the 

 last segment of abdomen corneous ; the general colour is whitish with the head yellow 

 and the frontal margin narrowly pale ferruginous ; the segments are separated by deep 

 incision?, and by the membranes called -by Schiodte the " praeterga " aud " postterga," 

 and bear three slightly raised warty setose prominences on each side ; the last segment 

 of the abdomen is rather long, conical and produced into a truncate point, but there 

 are no cerci ; the pupa is "not strongly narrowed behind, and bears moderately long 

 " styli motorii" which are furnished at apes with a long slender seta; the apex is 

 terminated by two curved cerci ; the larva mines dead boughs of oak. 



Two species only appear to belong to this genus, of which one is 

 found in Britain. 



C. testaceus, OL ( Q flavicoUi*, Gyll. ; Vigorsi, Steph., nee Muls.). 

 Elongate, moderately convex, but depressed on disc, rather shining, 

 testaceous, clothed with thin pale pubescence; head testaceous or dark 

 with the front testaceous, distinctly punctured, eyes black, prominent, 

 antennae long, 10-jointed, black with the three first joints yellowish- 

 red ; thorax transverse, strongly narrowed in front, broadest behind 

 middle and thence narrowed to base, rather closely and distinctly 

 punctured ; elytra subparnllel, a little widened behind, obtusely rounded 

 at apex, rather coarsely and in part almost subrugosely punctured ; legs 

 long and slender, clear yellowish-red. L. 5-7^ mm. 



V. Vigorsi, Steph. Black with the thorax, mouth, palpi, labram 

 and legs reddish-testaceous j antennae as in the type form. 



In dead boughs of trees, rotten wood, &c. ; rare; Forest Hill, Shooter's Hill, 

 Coombe Wood, Kipley, Cobham, Richmond Park, Wimbledon; Hertford; Windsor; 

 Lewes; Glanvilles Wootton ; New Forest; Bretby Park and Wood, near Repton, 

 Burton-on-Trent ; Sherwood Forest; Dunham Park, Manchester; the variety is very 

 rare, and has occurred in Sherwood Forest and in Cumberland. 



The second European species, C. Irtvirollis, Kr. (Vigorsi, Muls., nee 

 Steph.), has npt occurred in Britain, the dark variety of C. te*tac^us 

 with, red thorax having been mistaken for it ; I am indebted to Herr 

 Emitter for authentic specimens of the species, which is less than half the 

 size of C. testaceus (being about the size and shape of Luperusflavipes), 

 with longer antenna?, of which the second and third joints are very smut 

 and equul in length, whereas in C. testaceus the third joint is rather 

 l"iig and about three times as long as the second : the elytra are shining 

 bluu or bluish-black and the under-side is black, the thorax, base of 

 antennae and legs being clear reddish-testaceous. 



