652 BOSTON JOURNAL 



Length three-twentieths of an inch. 



In the sidciconis 111., the thoracic grooves are not interrupted on 

 the back; it is also smaller than the present species. 



ODONTJEUS Meg. 



0. MUSCULUS. — Small, brown, with short hairs; elytra with 

 punctured striae. 



Inhabits Indiana. 



Body small, liglit chestnut brown, darker before, with very 

 numerous short hairs, punctured : head, between the eyes, with a 

 hardly elevated, arcuated line, above which is a transverse 

 indentation, then a hardly perceptible raised line : labrum 

 emarginate; mandibles concave above, convex beneath, regularly 

 arcuated, exterior edge entire : clypeus not trilobate at tip, entire: 

 antennoe yellowish at tip : thorax convex, laterally a little dilated 

 towards the base; an indentation on the middle of the lateral 

 submargin; elytra with somewhat impressed and punctured [179] 

 stria3, which are obsolete on the humerus ; interstitial lines 

 depressed, with minute punctures furnishing hairs. 



Length over one-fifth of an inch. 



A rare insect; I have found but one specimen, which is 

 probably a female. It is even smaller than the O.filicornis nob., 

 and in form more like the Lazarus Oliv. than the ccplius Oliv. 



[A species of Ochodxus, afterwards described as 0. amrricanus 

 Westwood, Trans. Ent. Soc. London, 2d ser. 2, 66. — Leg.] 



TROX Fabr. 



1. T. ALTERNATUS. — Elytra with cinereous, elevated lines 

 interrupted by black spots. 



Inhabits United States. 



Body black, or black slightly tinged with brown : head bituber- 

 culate : thorax with obtuse, elevated, interrupted lines, irregularly 

 punctured ; posterior angles obtusely dentate : scutel, posterior 

 margin cinereous: elytra striate with dilated punctures ; alternate 

 interstitial lines more elevated, cinereous, interrupted by black spots. 



Length over half an inch. 



This species is readily known by the cinereous and black 

 alternation of the more elevated interstitial spaces. A variety 



[Vol. I. 



