4 EDWARD P. VAN DUZEE. 



3. Sliort oval or almost heiiiisplierioal ; whole surface closely jiunctate; color 



deep black, opaque or somewhat polished 4. 



Foim oval or more or less narrowed posteriorly, surface polished, )imictures 

 distinct or almost obsolete 5. 



4. Form very short and broad, rounded behind, a little ])roduced before; body 



distinctly ciliate all around ; surface opaque eiliata. 



Form short oval, somewhat polished above, but closely puiictuied and tians- 

 versely wrinkled on the pronotum and l)ase of the scutellum; sides 

 not ciliate nigra. 



5. Surface highly |)oiisbed, punctures almost obsolete on the surface above ; form 



regularly oval ; size large, 5 to 6 mm 11 ill color. 



Surface polished, distinctly punctured ; form more or less narrowed pos- 

 teriorly fi. 



6. Sides of the pronotum strongly de|)ressed, the nai'row recurved edge hecmning 



ol)solete before the polished tubercular humeri anlliracina. 



Sides of the pronotum less abrupt, the narrow recurved edge continued around 

 the humeral angle, humeri not polished and tubercular 7. 



7. Size larger (4-4i mm.) ; apex of the head not i-ecurved ; inner sector of the 



coriuni distinctly bent inward near the middle, leaving a punctured 



surface between it and the costal nervure iiitidtiloides. 



Size smaller (4 mm.) ; apex of the head distinctly recurved ; inner sectoiof the 



corium about parallel with the subcostal nervure.nili«luIoi<l<»}>> var. 



H. Corium yellowish with a black spot before the apex ; edge of the pronotum and 



abdomen ciliate (Uhleri obtiisa. 



Corium black marked with white or yellow 9. 



9. Corium with a large white spot covering the base; size large (4 mm.). 



reiiorniafa. 

 Corium bordered without, sometimes oroadly, with white or yellow. . . 10. 



10. White margin of the corium narrowed basally, not passing the subcostal 



nervure; costal edge tumid, impunctate Giilettii. 



White margin of the corium extended inwardly at base in conformity with 

 the basal sinus of the scutellum 11. 



11. Form elongated, narrow ; length 3 to 3i mm.; surface strongly punctured, 



polished ; exposed portion of the corium almost entirely pale or orange. 



exieiisa. 

 Form broader, ovate ; pale margins of the elytra narrower 12. 



12. Size rather large, about 4 mm lateraliiii. 



Size smaller, about 2A mm . . ; piiliCiiria. 



C'orimel:ciia iiiiicolor P. B (helopioides Wolff, and aira A. & S.). 



For tliis species I liave followed the identification given hy Dr. 

 llhler in Proc. Boston Soc. Nat. Hist., xix, p. 366, 1878, but have 

 used the name adopted by Letliierry and Severin under the suppo 

 sition that it is founded on a later comparison with the types. This 

 is our largest CoiimeUeiia and seems to be most at home in the 

 northeastern states, where it is found singly on weeds and grass in 

 damp situations. It may be best distinguished from niiiduloides by 



