THE LEAF BEETLES. 



1101 



above, but in subtiUs the male is convex and the female flattened. 

 But two, distinct a and torosa, have the sutural margins sinuate. 



KEY TO SPECIES OF GROUP B. 



a. Body broad, distinctly flattened above; middle coxa* separated by aboul 

 tlieir own width. 

 b. Third joint of antennae about one-half longer than second, 

 c. Thorax finely and indistinctly punctate. 

 d. Color brownish or fuscous yellow ; form more slender ; hind tibiae 

 of male curved, serrate; elytral punctures liner. 



2024. CINCTICORNIS. 



dd. Color purplish-black ; form broader, more robust ; hind tibiae 

 straight ; elytral punctures coarser, subquadrate. 



2025. PROXIMA. 



cc. Thorax coarsely punctate over its entire surface. magnifica. 

 bb. Third joint of antennae more than twice the length of second. 



e. Elytra truncate at tips; first ventral segment of male simple, con- 

 vex. 



/. Front tarsi of male dilated; color greenish-bronzed; larger, 9- 

 11 mm. 2026. palmata. 



//. Front tarsi of male simple ; color brownish-yellow ; smaller, 6- 

 8 mm. 2027. rufescens. 



ee. Elytra subtruncate at tips, form more convex ; first ventral of male 

 concave at middle ; sides of thorax strongly tuberculate. 



2028. PISCATRIX. 



aa. Body narrower, more convex above ; middle coxae separated by less than 

 their own width. 



g. Thorax with disk even, punctate, not or scarcely tuberculate on sides. 

 h. Punctures of thorax very fine, confused and confluent; third joint 

 of antennae one-third longer than second. 2029. curticollis. 

 ////. Punctures of thorax larger and distinct. 



i. Antennae and legs pale reddish-brown, the former very stout, the 



second and third joints subequal ; thorax with coarse, trans- 

 verse wrinkles in addition to punctures. 2030. megacornis. 



ii. Antennae and legs dark reddish-brow T n to piceous, the former 



much more slender, third joint distinctly longer than second. 

 ,/. Punctures of thorax coarse, uniform in size, 

 fc. Third joint of antennae one-half longer than second; thorax 

 straight on sides. 2031. subtilis. 



Ick. Third joint of antennae twice the length of second ; thorax 

 constricted at middle. 2032. rugosa. 



jj. Punctures of thorax not uniform, finer mixed with the coarser ; 

 third joint of antennae one-half longer than second. 



POROSICOIXIS. 



!/g. Thorax with disk uneven, the sides tuberculate ; elytra with two 

 transverse depressions. 

 I. Sutural margin of elytra straight. 2033. .f:qltalis. 



//. Sutural margin of elytra sinuate. 



