182 AMERICAN COLEOPTERA 



Metasternum finely, sparsely punctate at the middle, a little less sparsely and 

 finely at the sides; metasternal epime.ra with a Pew very fine and vaguely im- 

 pressed punctures. Abdomen finely, sparsely punctulate. Middle coxae separated 

 by about half the coxal width; metasternum but very little longer between the 

 coxae than the post-coxal length of the first ventral. Sixth ventral segment very 

 distinct and nearly as long as the fifth in both sexes. Legs moderate. (PI. V, 

 fig. 71). 



Mule. — Front tibia' dentate in the usual manner just beyond the middle. 



Female.- -Tibiae simple. 



Length i.l 1.5 mm. 



Hub. — New Hampshire; Vermont; Massachusetts; Maryland; 

 Michigan; Illinois; Colorado; Utah; Montana. 



The points of difference between this species and americana have 

 been sufficiently set forth in the table and in the remarks under the 

 last named species. Angularis Lee. is founded on a small male 

 from Lake Superior; with it, in the LeConte cabinet, is placed a 

 similar male from Colorado. The specimens standing as cavicollis, 

 in the same collection, are all females and of the usual form. This 

 species seems to be essentially northern. 



M. tenollsi Lee. -The long tempora and broad outer joints of the antennal 

 funicle, as stated in the table, are probably sufficient for the recognition of this 

 very peculiar and apparently rare species. The general facies is that of cavicollis, 

 and the smaller examples of americana, and the possessor of material from middle 

 California should see to it that he has not mixed tenella with the commoner spe- 

 cies. Tenella differs from allied species in the prothorax being depressed poste- 

 riorly at the sides ; the eyes seem rather smaller than usual, and the elytra at 

 base are not at all wider than the contiguous base of the prothorax ; the humeri 

 less marked than in americana. if my memory serves me. I neglected to make a 

 formal description of the two examples in the LeConte cabinet, contenting 

 myself with noting the most salient distinctive marks. The length as given by 

 LeConte is .04 inch. 



Hub. — California (San Jose). 



The two specimens in the LeConte collection are all that are 

 known to me. 



Unrecognized Speciis. 



Cylindrinotata Mots. California. 



E.cigaua Mann. Alaska (Kenai). 



Helvola Mots. Pennsylvania. 



Inculta Mots. Georgia (Atlanta). 



Inermis Mots. New Orleans. 



These last three species are probably only slight varities of dis- 

 tinguenda. 



Orbicollis Mann. Alaska (Kenai). 



Ovipennis Mots. Pennsylvania. Probably equals americana. 



Planiuscula Mots. Alabama (Mobile). 



