THE LONG-HORNED WOOD-BORING BEETLES. 



1017 



VII. Physocnemum Hald. 1847. (Gr., " bladder + leg.") 



To this genus belong two species having the femora strongly 

 club-shaped; antenna} 11- jointed, longer than the body and taper- 

 ing to the end in male; as long as body and almost filiform in fe- 

 male, the humeri prominent and rectangular. One of the two oc- 

 curs in Indiana. 



1883 (5988). Physocnemum bkevilineum Say, 

 Journ. Phil. Acad. Nat. Sci., III, 

 1824, 413 ; ibid. II, 194. 



Elongate-oblong. Black; elytra bluish-black, 

 shining, each with three short raised whitish lines 

 on middle third placed side by side, the inner one 

 slightly oblique, usually a fourth line in front of 

 the middle one of these. Thorax subglobose, with a 

 rounded tubercle each side near the middle ; apical 

 half and sides covered with dense, short, velvet- 

 like hairs. Elytra granulate-punctate, sparsely pu- 

 bescent. Length 12.5-16 mm. (Fig. 426.) 



Madison, Putnam and Posey counties; 

 scarce. June 11- July 1. Occurs about elm 

 trees, in the wood of which the larvae bore. 



Rhopalopus sanguinicollis Horn, length 

 15-19 mm., is known from New York and 



Ohio. i Fig. 428. X 2i (After Forbes.) 



VIII. Phymatodes Muls. 1 840. ( Gr., ' ' growth + similar. ' ' ) 



To this genus belong 16 species, all of rather small size, usually 

 bright in color and having the prosternum very narrow and 

 pointed ; hind coxa? not prominent and not enclosed ; thorax 

 rounded, usually sparsely punctured and shining. Three have been 

 taken in Indiana, while two others perhaps occur. 



KEY TO INDIANA SPECIES OF PHYMATODES. 



a. Elytra without narrow cross-bands. 

 1). Thorax yellowish ; surface metallic. 



c. Larger, 12-13 mm. ; elytra and legs yellow more or less marked 

 with blue. 1884. vaeiabilis. 



cc. Smaller, 5-9 mm. 



d. Elytra blue, antennae dark. 1885. amcenus. 



dd. Elytra piceous. uvidus. 

 1)1). Thorax dark; elytra of lighter shade before the middle; length 9- 

 12.5 mm. dimidiatus. 

 aa. Elytra with two narrow white or yellowish cross-bands; length 6- 

 9 mm. 1S86. vaeius. 



