lOlO li'AMILY LII. VliKAUIiYVlU/a. 



or (&) oylindrical and pointed at the tip. The front tibias may have 

 an oblique snlc-us or groove on the inner snrfnee, or this groove may 

 be lacking. By combinations of two or more of these characters the 

 subfamilies are separated by the following : 



KEY TO SUBFAMILIES OF CEEAMBYOlDiE. 



u. Tli(ir;i.\; margined; labrum firmly united with the clypeus; body usually 



broad and dejii-esscd. Subfamily I. Pkiojn'i.n.e, p. lUKt. 



««. Thorax not margined ; labrum free ; body usually oblong, more or les.s 



cylindrical. 



(). Front tibiiE not grooved; last .loint of palpi not acute at tip, often 



subtriangular. Subfamily II. < Ierambycin^, p. lOlo. 



hb. Front tibife with an oblique groove on the inner side; palpi with last 



joint cylindrical, pointed at tip. 



Subfamily III. Lamiin^, p. lOCO. 



Subfamily I. PRIONINAE. 



Large-sized brown or blackish beetles having the elytra usually 

 leather-like in appearance; mandibles strong, frequently elongated 

 in the males ; last joint of palpi triangular ; front coxfe transverse, 

 with distinct trochantin. The mesosternum is without stridulating 

 surfaces, but some of the species produce a noise in the same way as 

 do certain grasshoppers, i. e., by rubbing the hind femora against 

 the edge of the elytra. They are slow-moving insects, flying only in 

 the evening. Some of the tropical forms are the longest of beetles, 

 measuring five to six inches in length. The larvie are broad, some- 

 what flattened and have six ver>- small but distinct feet. The sub- 

 family is separated into ten genera, only three of which are repre- 

 sented in Indiana. 



KEY TO INDIANA GENERA OF PEIONINiE. 



a. Sides of thorax \^ith two or three distinct teeth ; eyes strongly .Granu- 

 late. " 



6. Form elongate, parallel ; antennse 11-jointed, more slender the joints 



not overlapping. j_ Orthosoma 



66. Form stout, broad; antennae (in .mr sperios) 12-20-jointed, more or 



less overlapping, osi)eeially in the male. H 'prionus 



./«. Sides of thorax with one small, obtuse tooth near the base; eves finely 



granulate. ttt o ' 



111. Sphenostethvs. 



I. Orthosoma Dej. ]s:U, (dr., " st might + body.") 

 This genus is reprox,.ntc.l l,y a single Inrge species having the 

 hmd femora not deeply sulfate beneath and with several short 

 elevated ridges on the inner side. ' 



