LONG-HORNED WOODBOitEltg. 



151 



Sub-family PEIONXDES. 



f^'g- ^^J The Prionides are generally large, slow-mov- 



ing insects, flying only in the evening, and 

 usually of uniform ])lack or brown colors. They 

 are distingushed from the other Longicornes 

 chiefly by their sub-quadrate thorax, the sides 

 of which form a sharp margin, which is usually 

 divided into two or three teeth. The thighs 

 are never clavate or suddenly enlarged at the 

 end, as they are in many of the species of the 

 other sub-families. The eyes are usually coarse- 

 ly granulated, and the middle cotyloid cavities 

 are widely open on the outer side. Some of 

 the tropical species are of gigantic size, being 

 Pluo^^s LATicoLLis, Drury : fe- Ave or six inchcs in length. The larvae are 

 ma e— a ter Ki ey. broad and somcwhat flattened, and have six 



very small but distinct feet. They inhabit the trunks and roots of trees. 



The subfamily is named after the genus Prionus, of [^ig- ''^^.j 

 Geoflfroy, a term derived from a Greek word meaning a 

 saw, and applied to these insects on account of the long JLt dLfe^W 

 saw- toothed antennae t)f many of the species, especially of 

 the males. K 



IFig. 73.] 



^^ Pupa of PJhoNus — 



Larva of Prionus— after Pdley. after Kiley. 



The following are the principal N. American genera : 



A. Antennse not longer than the thorax ; thoracic margin without teeth ; tarsi simple Paeandea. 



A A. Antennae much longer than the thorax; tarsi spongy beneath, with the third joint bilobed. 

 B. Eyes coarsely granulated ; colors uniform. 

 C. Thoracic margin prominent ; side pieces of the metastemum parallel. - 



D. Eyes not closely approximate ; antennal joints imbricate ; teeth of the thoracic margin short 



and flattened. Body robust Prionus. 



D D. Eyes very large, approximate above and below ; thoracic teeth spine-shaped. Body elon- 

 gate. 

 E. Thorax much narrowed behind ; margin three spined, the anterior spine shortest. 3d joint 



of the antennae as long as the 4th and 0th united Dekohraohus. 



EE. Thorax nearly square ; margin 3-8pined, the hindermost spine shortest ; adjoint of an- 

 tennae but little longer than the 4th Orthosoma. 



D D D. Eyes very wide apart, but slightly notched ; size very large ; thoracic njargip usually 

 many toothed. 

 E. First joint of antennse much shorter than the third Ergates. 



