AMERICAN COLEOPTERA. 21 



Clypeal angles rather sharply denned, but not prominent or denti- 

 form, without or with but slight trace of external sinuation; 

 ventral segments margined at sides (except in chiric a huce) . 

 Prothorax widest near the base, sides broadly arcuate. 



87. truncatula. 

 Prothorax widest at or but little behind the middle. 



Eyes moderate; clypeal margin feebly or scarcely sinuate 

 between the angles; color normally piceous brown. 



88. punctata. 



Eyes large, clypeal margin more evidently sinuate between the 



angles, which are in consequence more sharply defined; 



color rufotestaceous 89. chiricahuse. 



Clypeal angles prominent and subdentiform, the external sinuation 

 distinct; ventral segments not margined at sides. 

 Rufotestaceous, punctuation finer and less dense. 



Eyes separated on the front by a distance fully five times as 

 great as the width of the eye as seen from the front; ely- 

 tral costse almost completely impunctate, except on the 

 declivity; prothorax strongly transverse... 90. levicosta. 

 Eyes separated on the front by a distance which at most but 

 slightly exceeds three times their own width; elytral costs 

 with the usual series of fine punctures; prothorax moder- 

 ately transverse. 

 Front rather strongly impressed or concave at middle; eyes 

 separated on the front by two to three times their own 

 width; prothorax more than one-half wider than long; 

 elytra one-quarter longer than wide, and two and one-half 



times as long as the prothorax 91. confusa. 



Front evenly and broadly convex, eyes separated on the front 

 by three and one- third times their own width; prothorax 

 slightly less than one-half wider than long, elytra one-half 

 longer than wide and three times as long as the prothorax. 



92. angularis. 

 Black, elytra brownish, upper surface with distinct viridiaene- 

 ous lustre; punctuation of elytra coarser and denser. 



93. a^iiea. 

 !. Interocular width of front about three times the width of the eye; 

 terminal joint of maxillary palpi three-quarters the length 

 of the antennal club; prothorax coarsely punctate; abdo- 

 men moderate punctate 94. misella. 



Interocular width of front about six times the width of the eye; 

 terminal joints of maxillary palpi nearly as long as the 

 antennal club; prothorax not coarsely punctate, ventral 

 segments with very few punctures 95. tenuis. 



TRANS. AM. ENT. SOC, XXXV. JANUARY, 1909. 



