BEETLES. 



333 



The species of friont/f: have three teeth upon each side of the pvothorax, the 

 anteniiffi are imliricated ; in /'. iml/ricornis the imbrication is beautifully exhibited. 

 The aiitennse have, iu .Vinerican sjiecies of /■'n'onii.i, from twelve to tweutv-scven 

 joints. P. laticol/is, one of the c<.>mnioii North ^Vmerican species, is from (1.75 to 1 

 inch in length, brownish black in color, and both male and female have twelve-jointed 

 antenniB. In P. imbricornis tlie joints of tlie antennas of the male vary from eighteen 





Fig. .373. — (7, Prioiius coriarms, and b, Ergatis faber, 



to twenty, wliile those of tiie temale Ikuc fi'oni sixteen to seventeen joints. The 

 males sometimes have a dit'fcrcnt number of joints iu the right and left antenna'. The 

 fleshy white Larv;e of P. latkoUis \h)w \n the roots of various [)laiits, among which 

 may be especially mentioned grape, apple, popl.ir, .and pine. Tu Europe, P. corkirius 

 is the common species; its larva feeds in the wood of 

 oak, birch, beech, and pine. Its egg.s, which are <le- 

 posited, two to eight or more in the same phu'C, are fusi- 

 form cylindrical, from 0.1(1 to 0.-2(l of an inch long, and 

 0.04 to 0.05 of an inch in <liameter. The eggs hatch 

 in about thirty-seven ilays, the young lar\;e eating 

 the bark of the tree on which the eggs are laid. 



Oftliosoina brunncum (sometimes called O. cijlin- 

 drictun), a more elongated species than those of 

 Prioirns, is found in the eastern United States. It 

 is from 1.25 to 1.75 inches long, of light-brown color, 

 and has eleven-jointed antenmw Its large fleshy 

 larva, which resembles that of PHo/ius, Ijores in 

 rotten stumps of pine, oak, and hemlock. 



A large pitch-brown Eurojiean species of Prioninte, Ergates fabci; from 1.25 to 2 

 inches long, feeds, in the larval state, ujion pine wood. 



Or til osoma hrun iicuin. 



