NATURAL SCIENCES OF PHILADELPHIA. 59 



This name cannot be retained, so I propose to revert to the Deje- 

 aniau specific name, dimidiaticornU^ and to give the genus the 

 name Hamletia, in honor of the Rev. Hamlet Clark, who did so 

 much to elucidate this troublesome group of Coleoptera. 



(Edionychis, Latr. 



Distinct from the preceding genera by the open coxal cavities, 

 and b}' the smooth or simply punctulate el}' tra. 



A. Thorax with the margins reflexecl but not produced, explanate ; size 



large. 



B. Thorax impunctate, yellow. 



C. Elytra blue or green. 



D. Elytra opaque, punctulate ; thorax unicolorous. 



ojxtcior, sp. n. 



Db. Elytra green, punctate, shining ; thorax spotted. 



gibbitarsia. 



Dc. Elytra blue, impunctate ; thorax unicolorous. 



histrans, sp. n. 

 Cb. Elytra variegated with white. 



D. Elytra each with four spots ; cpipleurse black. 



8-maculatts. 



Db. Elytra with a pale vitta ; epipleura? pale, interjectionis. 



Bb. Thorax punctate. 



C. Epipleurse black. 



D. Abdomen beneath more or less pale. abdominalis. 



E. Thorax yellow spotted with black. V. scripticoUis. 



Eb. Thorax black margined with yellow. 



F. Elytra punctulate, shining. V. vians. 



Fb. Elytra opaque. V. discicollis. 



Ec. Thorax black, V. concinna. 



Bb. Abdomen beneath entirely black, whole insect black. 



E. Opaque. lugens. ] 



Eb. Shining, thorax with hind angles prominent. 



violasceus. 

 Cb. Epipleurffi pale. 



B. Elytra blue. thoracica. 



Bb. Elytra pale with a black vitta. circumcincta. 



Ab. Thorax with the margins explanate ; elytra mostly pallid, size gene- 

 rally small; epipleuraj always pale; antennae with the third joint 

 nearly glabrous. 



B. Elytra blue, margins narrowly yellow. L. .34. jlavocyanea. 

 Bb. Elytra pale variegated with darker. 

 C. Epipleurae of elytra sinuate. 

 B. Intermediate tibia? simple. 



E. Elytra with two vittre, one dorsal, one lateral. 



petauriita. 



r 



