1010 FAMILY LII. — CERAMBYCID.E. 



or (h) cyliiuli'iciil ;iii<i pointed at tlie tip. The front tihiie ina\' have 

 an ol)]i(iiie sulcus or groove on the inner surface, or this groove may 

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

 subfamilies are separated by the following : 



KEY TO SUBFAMILIKS OF CERAMUYCID/Ti:. 



(/. 'riuir.ix iiiargiiied ; Inhruin •lirmly unitod with the clypeiis; body usually 



i)niad and depressed. Subfamily I. Prionin.e, p. 1010. 



(Id. 'J'luirax not margined; lahruni free; body usually oblong, more or less 



cylindrical. 



h. Front tibia' not grooved ; last joint of palpi not acute at tip, often 



suhtriangular. Snbfandly II. CEKAMUYCiN.i:. jt. lOKl. 



bh. Front tibia' with an oblique groove on the inner side; palpi with last 



joint cylindrical, pointed at tip. 



Subfamily III. Lamiix.e. p. 1(M;o. 



fciubfamily 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 triangidar; front coxte 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 grasshojipers, i. e., ])y rubbing the hind femora against 

 the edge of tlie 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 larva? are broad, some- 

 what flattened and have six very small Imt distinct feet. The sub- 

 family is separated into ten gen(n-a. only three of which are i-epre- 

 sented in Indiana. 



KEY TO INDIANA GKNEKA OF TKIOXIN-E. 



«. Sides of thorax with two or three distinct teeth; eyes strongly granu- 

 late. 

 h. Form elongate, parallel; antenn;e Il-jointed, more slender, the joints 

 not (iverlap]iing. I. Okthosoma. 



bb. Form stout, bi-oad: anteniuo (in our species) 12-20-jointed. more or 

 less ovei-lapiiing, esiiecially in tiie male. II. I'kionis. 



au. Sides of thorax with one small, olituse tooth near the base; eyes hnely 

 granulate. III. Sphenostethus. 



T. Ortttosoma D.'j. 1S:U. (Or., "straight + 1)ody.") 



This genus is represented by a siugU' 1-ii'ge species having the 

 hind femora not dee]^ly sulcate beneath and with several short, 

 elevated ridges on tho inner side. 



