238 CLAVICORNIA. [Omostta. 



ii. Thorax slightly contracted iu front ; elytra with a common 



lutcous spot reaching from base to beyond middle .... 0. DISCOIDEA, F. 



O. depressa, L. Entirely of a rust-red colour, except the head, 

 scutellum, centre of thorax, and a few scattered spots on elytra, which 

 are darker ; head thickly and somewhat rugosely punctured, antennae 

 with the first joint thickened, club compact ; thorax thickly and finely 

 punctured, with two impressions on disc behind middle, and a strong 

 longitudinal furrow on each side, posterior margin very distinctly 

 bisinuate ; elytra very finely, almost invisibly punctured, with strong 

 margins ; legs ferruginous. L. 4 mm. 



In dry carcases, also under bones, and at sap ; rare in the south, rather common 

 in the north; Ashtead, Surrey; Hastings; ^Netley; Glanvilles Wootton ; Llan- 

 pollen ; North Derbyshire ; Sherwood Forest ; Lancaster sands ; Northumberland 

 district; Scotland, locally common, Lowlands and Highlands, Solway, Forth, Tay, 

 Dee, Moray, and probably other districts ; Ireland, Kilruddery near Dublin, neur 

 Belfast, &c. 



O. colon, L. This and the next species are at once distinguished 

 from the preceding by their much smaller size, different colouring, less 

 close punctuation, more oblong form, and much narrower margins of 

 elytra ; in fact 0. depressa might for several reasons be made a separate 

 genus. 0. colon may be separated from 0. discoidea by its colour, 

 which is dark, with the margins of the thorax somewhat lighter ; the 

 elytra have each a rather small but distinct spot behind middle, reach- 

 ing to suture, and a few other smaller light spots towards base ; the 

 thorax is strongly rounded and contracted in front, so that the anterior 

 margin is considerably narrower than the posterior, and the base shows 

 very slight traces of sinuation. L. 2-3 mm. 



In dry carcases, haystack refuse, under old bones, &c. ; common and generally 

 distributed throughout the kingdom. 



O. discoidea, F. Very like the preceding, but distinguished by 

 not having the thorax much contracted in front, so that the anterior 

 margin is nearly as broad as the posterior, and by the elytra having a 

 common luteous or light yellowish spot reaching from base to beyond 

 middle and from suture nearly to side margin ; the posterior margin of 

 thorax shows hardly a trace of sinuation. L. 2-3 mm. 



Found under the same circumstances as the preceding; common and generally 

 distributed throughout the greater part of England, but less common further north; 

 Scotland, scarce, Solway and probably other districts; Ireland, near Belfast and 

 Dublin, and probably widely distributed. 



THALYCRA, Erichson. 



Only two species are contained in this genus, one of which occurs in 

 Europe and the other in the Australian region ; our single species is 

 very rare in Britain, and has only been taken in Cossus trees or by 



