32 CALIFORNIA ACADEMY OF SCIENCES. 



niitely and densely granulate. Abdomen slightly narrower than the elytra; 

 sides nearly parallel; surf.ice minutely, densely and sub-asperately punctate, 

 without any arrangement in wavy rows. Legs moderate; anterior tarsi mod- 

 erately dilated; first four joints of the posteiior decreasing uniformly and 

 very gradually in length, the first one-half longer than the second and 

 shorter than the fifth. Length 8.8 mm. 



Lake Co., 1 $> (Mr. Fuclis). 



This species is rather closely allied to the preceding, the 

 sexual characters being almost identical, the surface of the 

 fifth segment being slightly more strongl}^ swollen in the 

 middle near the apex and the notch of the sixth being very 

 slightly more broadly rounded in quadricoUis; in the form and 

 size of the pronotum, relative length of the elytra, and in 

 the punctuation of the abdomen, the two species are, how- 

 ever, so distinct that it can scarcely be possible to confound 

 them. 



The eastern Litlioclmris corticina Grav. is somoAvhat allied 

 to this genus, but is scarcely congeneric. The labrum in 

 corticina is very large, broadly explanate and rounded at the 

 sides; in the middle of its apical margin it has a small 

 abrupt emargination, at the bottom of which there is an 

 obtuse tooth which is the prolongation of a small anterior 

 dorsal carina. In the general form of the head it is strik- 

 ingly different from the members of Metaxyodonta. 



L. confluens Say must form the type of a genus quite dis- 

 tinct from any other here described, because of the very 

 different structure of the posterior tarsi which are short and 

 rather robust, and in which the basal joint is slightly shorter 

 than the second and less than one-half as long as the fifth. 

 For this genus I would propose the name Trachysectus. 



I am indebted to Dr. J. Hamilton of Allegheny and Mr. 

 F. M. Webster of Lafayette, Indiana, for specimens of these 

 species. ^.y.^^ 



luJBRARV.J 



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