BEETLES. 



331 



Fig. 3(i8. — Plfiffionutus 

 sjitciosus. 



The genus Elaphidion contains 



crevices of the bark of sugar maples, in which the hirvro bore. This species is not 

 very abundant, and, althouuh it now and then, perhaj)S, liills a very younti' ma]jle, its 

 ravages are not much to tie feared. Arliopcdus differs structurally 

 from Plaijionotus in ha\ iug tiliforni instead of compressed antenna>. 

 A.fulminans, the only North Aiiieriran s]iecies, is In-mvuish black 

 with fine grayish markings and dark brown legs ; it lias a con- 

 spicuous black spot on the pronotum, and the elytra are crossed by 

 four tine iiulistinct zigzag lines of gray. Its larva bores in oak and 

 chestnut wood. 



In CaUichroiivi the scutelluni is acute at the ti}i, the anterior 

 coxal cavities are closed behind, and the jirothorax has a spine on 

 each side. A common European species, C. moscliuta, of which 

 the odor has been already alluded to, is al)out an inch long, bronze 

 green with bluish green legs and antenna;. Its larva lives in willow. C. sjjlendi- 

 dum, a red-bronze si)ecies from 1 to l.:25 inches long, has been found in the southern 

 United States. 



longicorns of medium or large size, with rounded 

 thorax, moderately long, spiny antenna?, coarsely 

 ]junrtured eyes and often of clouded or rusty 

 ajipearance on account of the tmequal distribu- 

 tion of their pubescence. E. jMrallehan is one of 

 the commoner species in the northeastern United 

 States. It is about 0.6 of an inch long, and of an 

 ashy brown color. The larva is a common borer 

 in oak, and according to Prof. A. S. Packard, 

 "nniy lie recognized l)y the stout, thick thoracic 

 feet, by the rather small jirothoracic segment 

 compared with the two hinder ones, by the ab- 

 sence of the ligula, by the large well-developed 

 pal]ii and autennse, and liy the shape of the cal- 

 losities." I have found the larva of this sjiecies 

 to be very injurious to the 

 hickory in nortliern Connec- 

 ticut, where it eats away the 

 wood beneath the bark of twigs up to an inch in diameter, causing 

 the twigs to fall in winter, when the larva continues feeding in the 

 fallen portion. The larva of Catoiienus riifmi., a lieetle belonging 

 to the Cucujidff and common in the same region, devours pupre of 

 E. parallelum. Chion cinctus resembles .■in Elaphklion in general 

 asjiect, except that the prothorax of C/iinii has a siiort spine on 

 each side, and its seutellum is trianguhir instead <if nnnided behind. 

 In C. ductus the seutellum is whitish, and tliere is an irregular 

 yellowish banil partly across each elytron just forward of the 

 middle. The larva fee<ls in hickorv. 



Fig. .%9. — Chion cinctus. 



Ceramhu.i' heros, a not unconnnon brownish-black beetle in Fi" 



370. ■ 



■ Larva and 



pupa of Vhion cinctus. 



Europe, is from 1 to 1.6 inches long, with antenna- aVwut equal 



in length to the bodv. Its juuthorax is jilicate above, and armed on ea<-h side with a 



spine. Its large tieshy white larva feeds in the wood of oaks, the beetle re(juiriug two 



