152 THE OEDEE OF COLEOPTEHA. 



FF. First joint of antennae at least as long as the third Maixodon. 



C C. Thoracic margin almost wanting, with a short spine ; side pieces triangular ; head verti- 

 cal Tragosoma. 



B B. Eyes finely granulated ; colors variegated ; thorax rough, without lateral spine Sphenostethus. 



Parandra, Latr., contains two species, one of which, the P. hrunnea, 

 Fab., is common. It is about seven-tenths of an inch long, and of a 

 glossy mahogany-brown color. The other species, P. polita, Say, is 

 much more rare. It closely resembles the other, but can be distinguished 

 by its head being as wide as the thorax. 



Priomis, Geoff., contains many species. The two most common are 

 the P. imbricornis of Linnaeus, less than an inch long, of a mahogany- 

 brown color, with long imbricated antennoe, the joints lapping one 

 upon another ; and the P. hrevicorni^, or short-horned Prionus, of Fab- 

 ricius ; the antennse of the female are scarcely a third as long as the 

 body, but those of the male are much longer. This species is black, 

 the male an inch and a quarter, and the female an inch and a half or 

 more in length. 



Derobrachus, Serv., contains one large brownish-yellow species found 

 in the Middle and Southern States. 



Orthosomaj Serv., contains one common species, the 0. cylindricum, 

 Fab., along, narrow, brown insect, an inch and a quarter in length. 



JErgates, Serv., has but one species, from California, originally de- 

 scribed by Dr. LeConte under the name of Trichocnemis sjncidatus. 



Mallodon, Serv., contains several species, none of which are common. 



Tragosoma, Serv., contains but one species, the T. Harrisii, Lee. 



Sphenostethus, Hald., contains but one species, the iS. serripennis, Hal- 

 deman, but previously described by Buquet under the name of Solenop- 

 era Taslei. It is of medium size, of a blackish-brown color, and inhab- 

 its the Middle and Southern States, but is nowhere common. 



Sub-family CEEAMBTCIDES. 



The Cerambycides are much more numerous and diversified than the 

 Prionides, and are often ornamented with bright and variegated colors. 

 They differ from the Prionides chiefly in having the sides of the thorax 



rounded, without a salient margin, but 

 sometimes furnished with a single spine 

 or tubercle on each side, and from the 

 Lamiides in having the head sometimes 

 horizontal, but usually more or less in- 

 clined, whereas- in the Lamiides it is ver- 

 ticle. 

 It must be remarked however that the 



EuniiDiON PAHALLF.LUM, Newm. : — a, n , • , .,..,, 



larva; 6, twig split open, showing the en- lacc may assuuie a Vertical positiou in the 



closed pupa : A:, the severed end of the twi<r: y-, i • i i ,-, ■, ■, . ■, 



c, beetle;!, i)aHai .joints of the antciiii;i-, Cerambycides, whcu the head is bent 



showing the chamctcristic spines at tlie tip ■ ^ j iiij-i 



of the 3d and 4th . joints :./. tip of elytron ; strougly dowuwards, but the transition 



<^i «i/i <?> ''i head, maxilla, labium, mandible, /• ,-, • j. ^ j.i j» • -i 



and antenna of larva— after Eiley. ITOm the OCCiput tO the laCB IS here USU- 



