THE LONG-HORNED WOOD-BORING BEETLKS. 



1011 



1875 (5908). OBTHOSOMA BRUNNEUM Forst., Nov. 



Spec. Ins., 1771, 37. 



Elongate, parallel. Uniform light chestnut- 

 brown, shining. Head with a deep impression be- 

 tween the antenna*. Thorax inure than twice as 

 wide as long, each side with three sharp teeth. 

 Elytra each with three tine raised lines, surface 

 finely and rather thickly punctured. Fifth ventral 

 segment rounded in female, broadly truncate in 

 male, leaving the sixth visible. Length 22^0 mm. 

 (Fig. 423.) 



Throughout the State ; frequent. June 29- 

 August 14. Often enters houses to which it is 

 attracted by light. The larva 1 are supposed to 

 live only in pine, but evidently feed on oak 

 and walnut trees in Central Indiana, where pine are absent. 



I'i. 4L'3. Natural size. 

 (After Riley.) 



II. PRIONUS Geoff. 1704. (Gr., "a .saw.") 



Very large, broad forms having the antennal joints conical, 

 stout and overlapping in male; more slender and subserrate in fe- 

 male; the surface of the fourth and following joints covered with 

 fine, reticulate, elevated lines bearing special sense organs; thorax 

 armed each side with two or three sharp teeth; elytra broadly 

 rounded at a;;'X. punctate and ornamented with raised lines. Three 

 of the six rei-ngni/ril species occur in the State. 



KEY TO INDIANA SPECIES OF PRIONUS. 



(i. Antennal joints 12; soles of hind tarsi densely pubescent. 



It. Elytra at base not wider than thorax; all 

 joints of hind tarsi densely pubescent 

 beneath. 1876. I.ATICOLLIS. 



hit. Elytra at base wider than thorax; basal 

 joint of hind tarsi nearly smooth. 



1877. POCULARIS. 



an. Antennal joints 36-20; soles of hind tarsi 

 with scattered hairs. 1878. IMBRICORNIS. 



IMC. i.V.i.V.M. I'hioxrs I..VIK OLI.IS Prury, 111. 

 Nat. Hist., II. 1773, 83. 



l.road. stout. Piceous black, shining. An- 

 tenna* of male longer than body; of female about 

 one-hall the lenglli. Thorax almost or quite as 

 Fig. 424. Female. Xat.ir.il size. I'''"'"! ''* tin- base of elytra, sides with three 

 (After LeBaron.) teeth, the hindmost one often indistinct; these 



sometimes slightly rellexed. Elytra broader at base than apex; each with 

 three slightly elevated lines; surface roughly, coarsely and very irregu- 



