76 1 September, 



C. DEPLANATUM, Gyll. 

 Closely allierl to C.ferrngineiim, but rather smaller and more depressed ; it is 

 the flattest species of all that have been described : in the male the thorax is 

 evidently, although gradually, narrowed towards base, in the female the sides are 

 almost straight, in both sexes it is longer than broad ; the basal impressions are very 

 small, and often only indicated by a very narrow fovea at base, which sometimes is 

 almost absent ; this point will distinguish it from both the preceding : the strise of 

 the elytra are moderate and reach apex ; the sutural stria is, however, not deeper at 

 apes. Long., I5-2 mm. 



Eare ; under bark of beech, aspen, and poplar, and, probably, 

 other trees ; Central Europe. The species appears to be very rare in 

 Britain ; I have only seen two or three examples, taken, I believe, by 

 Mr. Gorham in the New Forest ; most of the specimens that stand 

 under the name appear to be small varieties of ferrugineum. 



The larva of O. histeroides is described by Ferris (Ann. Fr., 1853, 

 p. GIG) : it is elongate, somewhat parallel, entirely white, with reddish 

 head ; head depressed, antennse four-jointed, first joint thick and short, 

 second shorter and much narrower, third longer than the first two 

 together, fourth slender and very long, as long as all the rest united ; 

 maxillary palpi three-jointed, last joint elongate ; prothorax longer 

 than either meso- or metathorax, both of which are longer than the 

 abdominal segments, which are of equal lengths until the last, which 

 is somewhat developed, and has on the back two papillae, each furnished 

 with a long hair ; it is deeply emarginate behind, and the lobes of the 

 emargination appear to be trifid at apex ; tarsi short and stout, three- 

 jointed ; legs ciliate. The larva, according to M. Ferris, lives in the 

 galleries of HyJurgus inniperda of which it destroys the larva ; it also 

 occurs on other trees than pine trees under different circumstances. 



The following appears to be the true list of our British species : — 



C histeroides, F. 



V. longicoUe, Reitter. 

 C.fagi, Bris. 



forticorne, Muls. 



V. excavatum. 

 C. ferrugineum, Steph. 



angustatum, Er. 

 C. deplanatum, Gryll. 



In conclusion, I must thank Dr. Sharp, Mr. Blatch, Mr. Champion, 

 Mr. Gorham, and others, for lending me specimens ; altogether I have 

 been enabled to examine some hundreds of British examples of the 

 genus ; among these are certain forms concerning which I still feel 

 doubtful, but I believe they are all to be referred to one or other 

 of the four species just mentioned. 



Lincoln : Jnlt/ 9th, 1886. 



