12 W. Qzvight Pierce 



TABLE OF THE SPECIES OF RH1PIPIIORUJS OF THE UNITED STATES 1 



(Remodeled from Horn, Trans. Amer. Ent. Soc, 1875, vol. 

 V, p. 121.) 



1. Anterior coxae contiguous in their entire extent 2 



Anterior coxae separated in nearly their entire length by 



a slender prolongation of the presternum 7 



2. Anterior tarsi of male spinulose beneath, elytra very acute 3 

 Anterior tarsi of male with three joints pubescent beneath 4 



3. Basal lobe of thorax with a strong elevation; second joint 



of hind tarsi not flattened above flavipennis Lee. 



Basal lobe of thorax transversely notched at tip ; second 



joint of hind tarsi flattened above. .. .dimidiatus Fabr. 

 .4. Second joint of hind tarsi shorter than third and flat above 5 

 Second joint of hind tarsi longer than third, subcylindri- 

 cal ; lobe of thorax neither carinate nor notched. . . 

 cruentus Germ. 



5. Thoracic lobe with obtuse elevation and a deep fovea on 



each side bifovcatus Horn 



Thoracic lobe not elevated; surface regularly convex. ... 6 



6. Metasternum very densely punctulate, punctures closer to- 



gether than their own diameter ... octomaadatus Gerst. 

 Metasternum more shining, moderately punctured, punc- 

 tures distant at least their own diameter 



pectinatus Fabr. 



7. Vertex scarcely elevated, obtuse, and nearly impunctate. . 8 

 Vertex much elevated, acute, sparsely punctured. Second 



joint of hind tarsi flattened above, equaling and 

 slightly longer than the third ; epistoma long, api- 

 cally rounded, slightly truncate aeiitipeiinis n. sp. 



8. Second joint of hind tarsi longer than half the third and 



not flattened above; epistoma oval linearis Lee. 



Second joint of hind tarsi shorter than half the third and 



flattened above; epistoma truncate limbatus Fabr. 



1 See pi. I, figs. 8, 9. 



164 



