46 LAMELLICORNM. [Troyitia. 



of the tribe are oblong and convex, with a rough scabrous surface, and 

 are often covered with a crust of dirt ; they live in dry decomposing 

 carcases, hides, horns, &c. ; the antennae are 9- or 10-jointed with the 

 club 3-jointed ; the ventral segments are live in number and free ; the 

 abdomen is covered by the elytra; all the coxae are contiguous ; the 

 legs are comparatively slender and not strongly fossorial; the larvae much 

 resemble those of the Aphodiinu, but are distinguished by having the 

 antennae 3-jointed instead of 5-jointed. 



TROX, Fabricius. 



This genus contains about a hundred species, which are very widely 

 distributed in tropical, temperate, and cold countries, ranging from 

 Siberia in the north to Patagonia in the south; eleven species occur in 

 Europe, of which three are found in Britain, one of which is somewhat 

 doubtfully indigenous. 



I. Size larger ; form broader ; elytra considerably widened 



behind. 



i. Striae of elytra strongly punctured T. SABULOSUS, L. 



ii. Striae of elytra feebly punctured T. HISPIUTJS, Laich. 



II. Size smaller; form narrower; elytra not much widened 



behind T. SCABEB, L. 



T. sabulosus, L. Obovate, black or greyisli-black, very dull ; 

 head narrowed in front, rugose, antennae reddish ; thorax transverse, 

 slightly narrowed in front, anterior angles projecting, posterior angles 

 sharp right angles, upper surface uneven, very thickly punctured, sides 

 and base and also sides of head fringed with yellowish setae ; elytra with 

 flat, broad, strongly punctured striae, alternate interstices raised and 

 furnished with bunches of depressed short yellowish or greyish-yellow 

 setae; legs dull black. L. 7-8 rum. 



Sandy places; in dry carcases, rams' horns, &c. ; not common ; Sundridge (Kent), 

 Mickleham, Wimbledon, Cooinbe Wood, Headley ; Dover ; Hastings ; Devon ; 

 Newmarket Heath ; Bewdley ; Cunnook Chase ; Scotland, very rare, Tay district. 



T. hispidus, Laich. Of the size of the largest specimens of T. 

 sabulosus, and very similar to - it in form and sculpture ; it differs, 

 however, in having the striae of the elytra finely punctured, and in the 

 fact that the interstices are tuberculate, the rows being alternately 

 large and small ; the tubercles are furnished with bunches of moderately 

 long erect yellowish setae. L. 8 mm. 



The species was introduced as British by Mr. Waterhouse in 1860 on 

 the authority of a specimen or specimens of which he did not know the 

 locality, and there is also a specimen in the Rev. A. Matthew's collection, 

 which was taken by the Rev. H. Matthews. 



T. s caber, L. (arenariug, .). Much smaller and narrower than 

 either of the preceding species, and less convex, oblong-obovate, slightly 



