31 



HARRIS TO HENTZ. 



Milton, June, 1827. 



Your specimen of Ohremastoclieilus arrived in due order; 

 the head, however, was wanting, and the mentura was so much 

 bruised as to leave me at loss to determine whether the jugular 

 eraargination was deep as in C. Hentzii and C. castanece (H.) ; 

 or shallow, as in C. Sayi (H.) and C variolosus Kirby. 



Taking only the form of the thorax into consideration, C 

 castanece? (H.) may be characterized as having that part sub- 

 quadrate, the lateral margin nearly straight and the tubercles 

 prominent, subglobate. C. Hentzii (H.), thorax subquadrate, 

 the lateral margin arched, the tubercles somewhat triangular, 

 subacute. O. Sayi (H.), thorax transverse, a little broader be- 

 hind the middle, suddenly contracted behind, lateral margin 

 arched, tubercle slightly top-shaped or sub-tuberculate. Your 

 Carolinian species appears to have the thorax transverse, con- 

 spicuously broadest behind the middle, then suddenly con- 

 tracted ;. the lateral margin arched, the posterior tubercles 

 large, turbiniform. But the following is the description I have 

 drawn up from your specimen, and I would thank you to supply 

 the deficiencies, correct the mistakes, and suggest any improve- 

 ments which may appear proper. ' 



C. , black, opaque, setose ; palpi piceous ; thorax broad- 

 est behind the middle ; anterior tubercles very small, acute 

 and incurved ; posterior ones large, polished, turbiniform. 



Head — Clypeus ? Mentum ? Palpi pale piceous. 



Thorax one third wider than long, with sharp distinct vari- 

 oles, and short whitish hairs ; anterior tubercles very small, 

 acute, incurved ; lateral margin arched to behind the middle, 

 where the thorax is much the broadest ; behind this, on each 

 side, a deep emargination, within which is situated a large, 

 polished, turbinated tubercle. Elytra with oblong, distinct, 



