tillid^e. 321 



Very slender, filiform, elongate ; opaque, pale greenish ; very thickly punctured, 

 and slightly clothed with a pale pubescence: forehead foveolated : thorax 

 elongate, with an obsolete dorsal channel : elytra very long, linear, very ob- 

 soletely striated, the apex acuminated, gaping : body beneath glossy-teneous : 

 legs black ; femora tinted with aeneous : antennae black, with the second joint 

 testaceous. 



The very slender form of this insect, combined with the dissimilarity in the 

 structure of the antenna?, the second joint of which is short, globose; the re- 

 mainder more or less elongate, obconic, and slightly produced within, with the 

 terminal one larger and fusiform, with the very slightly pubescent, or rather 

 squamous, surface, point out its claim to be distinguished as a genus, as before 

 mentioned : — it has considerable resemblance in external form to Lymexylon 

 navale. 



So far as 1 am aware, the only indigenous examples of this 

 pretty species have been found as below : it is a maritime insect. 

 " Wrabness, Essex." — The late Rev. R. Sheppard. " Deal, in 

 June, 1829 ; and Southend, in June, 1830."— Rev. F. W. Hope. 



Family XXXIX.— TILLID^, Leach. 



Antennas subclavate, with the three or four terminal joints, especially the last, 

 incrassated: head inflexed, retractile within the thorax to the eyes, which last 

 are frequently lunate: thorax elongate, subcylindric, or subcordate : body 

 elongate, subcylindric: tarsi five-jointed, the penultimate joint always bifid. 



The insects of this family are in general extremely beautiful, and 

 either reside in rotten wood, or in the nearly dried remains of 

 animals, but their larvse are for the most part, so far as known, carni- 

 vorous : they may be known with facility from the foregoing, by 

 having their antenna? more or less incrassated towards the apex, 

 the latter being generally subclavate, the penultimate joint of the 

 tarsi bifid, &c. 



The subjoined are the genera which have hitherto occurred in 

 Britain : 



C subfiliformes : . . 244. Tillus. 



( baud brevissimo. Antenna •< 

 Tarsi j £art is .3s. ultimis sensim 



art". -[ crassioribus : . 246. Thanasimus. 



priGiO j 



^br^vissimo. f securiformi : 245. Opilus. 



Palpi maxillarcs -\ 



art , ultimo | crassiore, obconico ; C securiformi : . 247. Clerus. 



(^ labiates eodcni art°. < 



^obconico. C magno, 

 Antcnnarum < quadrato : 248. Necrobia. 

 art". ult°. frotundalo: 241). COHYNETES. 



