This genus completes our illustration of the family called 



Cleridae or Tillidse, and the genera comprised in it may be 



thus characterized : — 



Plate. 



Antennae serrated tillus . . . 267 



Antennae clavate : 



Palpi all hatchet-shaped opilus . . . 270 



Labial palpi only hatchet-shaped .... clerus ... 44 



Maxillary palpi very small thanasimus 398 



Penultimate joint of tarsi the smallest . corynetes .351 

 Terminal joint of antennae much the 



largest subrhomboidal necrobia . . 350 



'tj" 



Thanasimus follows Opilus in the ' Guide,' but it arranges 

 more naturally I think after Clerus. The only species that 

 has been discovered in Britain is 



T. formicarius Linn. — Curt. Brit. Ent.pl. 398. 



Rufous pilose and pubescent : antennae piceous : head and 

 thorax thickly punctured, the former and the anterior margin 

 of the latter black : elytra black, and thickly clothed with de- 

 pressed hairs, excepting the base which is rufous and deeply 

 and coarsely punctured in strise ; before the middle is a nar- 

 row waved dirty white fascia, and towards the apex a broader 

 and more regular one: legs black, tips of tarsi ferruginous. 



Gyllenhal mentions a small var. with rufous legs, the knees 

 sometimes black, (which is the C.femoralis of Dejean's Cata- 

 logue), another with the breast and legs black, and a third 

 with the breast blackish, the tibiae and tarsi reddish. 



This is the insect that is said to destroy an Anobium we 

 lately figured in Plate 387, that is vei'y destructive to furni- 

 ture, &c. It inhabits the trunks of trees and wood recently 

 felled, especially the Scotch and spruce firs ; it runs very nim- 

 bly, and has been named Jbnnicarius from its resemblance in 

 form and manners to an ant. The larva lives under the bark 

 of decaying trees. 



Mr. Dale informs me that he took a specimen on the trunk 

 of a Scotch fir at Glanville's Wootton, June 30th : it has been 

 captured also by Mr. Sparshall at Wrabness, in Essex ; by 

 Capt. Blomer at Teignmouth, Devon, in Sept. ; on the sea- 

 shore, Dublin, by Mr. Bulwer; atTynemouth, by Mr.Wailes; 

 and on sandy banks, Coombe in June, by Mr. Samouelle : I 

 once took a specimen in April upon a tree at Ditchingham in 

 Norfolk, and Mr. Lyell showed me a specimen that 1 believe 

 was captured at Kinnordy in Scotland. 



The Plant is Chenopodium murale (Netde-leaved Goosefoot). 



