36 MATERIALS TOWARDS A HISTORY 



'10. A. SUBSTRIATUM. 



Black, punctured, slightly pubescent: elytra indistinctly striate, with about three inconspicuous costse. 



6'" long. Inhabits Massachusetts. 



Callidium substriatum, Gcrmar, MS. Bost. Coll. 576. Prothorax subequal, narrowed anteriorly : elytra 

 with the sides regularly convex, and having three obsolete approximate central costac, the outer ones united 

 posteriorly. 



41. A. JUVENCUM. 



Dull reddish-brown; prothorax transverse, dilated laterally, a large fovea upon each side above; elytra obso- 

 letcly striate, dull fulvo-sericeous. 



T" long; 2 wide. Cab. Le Conic. 



Criocephalum juvencum, Dej. Cat. Head slightly clothed with short hair; antennae very short; front 

 slightly indented between the antenna', mandibles and tip of the palpi black: prothorax inflated laterally, sides 

 very convex, minutely scabrous, partially clothed, especially in the fovea?: under parts polished. 



Closely allied to substriatum, but the prothorax is rather wider than the base of the 

 elytra, whilst in that species it is slightly narrower, and converges forwards in a straight 

 line, corresponding with the sides of the head. 



42. A. fuscum. 



Testaceous, eyes black, metasternum and postcoxa? piceous; prothorax equal; elytra parallel, with obsolete 

 elevated lines. 



4'" long. Inhabits Pennsylvania. 

 Callidium fuscum, Mels. Cat., No. 820. 



HYLOTRUPES, Scrv. Ann. Ent., iii. 77. 



43. H. baitjlus, Lin. Fabr. Syst. El., ii. 33. 



Inhabits Europe and America. 



V ar. bultatus. Shining black; head large; prothorax very large, transverse; elytra very pale yellowish- 

 brown, translucent. 8'" long; 2| wide. 



General character of H. bajalus, but may be distinct. The elytra are discoloured, 

 and the head and prothorax abnormally enlarged. The dorsal facets are also larger. It 

 is clothed with a similar white down, including the tufts upon the elytra. Characterized 

 from a female in Mr. Lc Contc's cabinet. 



ARHOPALUS, Sen: Ann. Ent. iii. 77. 

 1 1. A. fulminans, Fabr. Syst. El., ii. 34(1 Angulatus, F., ii. 350. 



CALLIDIFM, Fabr. Serv. Ann. Ent., iii. 77. 



45. C. andrejE. 



Rubrotestacoous, elytra varied with black; antenna' black, varied with reddish: head one-half the diameter 

 of the thorax, medial line beneath, black: frontal line impressed: pronotum flattened; posterior angles with a 

 1 irge, prominent tubercle, having a wide depression anterior to it; an obsolete medial tubercle anteriorly: elytra 

 flattened; humeri very prominent; three curved elevated lines, the two exterior ones interrupted; anterior por- 



