384 



REVISION OF THE TENEBRIONUXE OF AMERICA, 



This species resembles in size, color, form and general appearance the female of exca- 

 vatum, Say, though readily distinguishable by the absence of horns or tubercles. The 



scutellar stria is almost totally obliterated and replaced by a, single larger and many small 

 irregularly placed punctures. The presternum is horizontal, acute and produced behind, 

 and rather more deeply received in the mesosternum than usual. 



The above description and the substance of the remarks are drawn from the manu- 

 script of the late Dr. Zimmerman, of Columbia, South Carolina. It is greatly to be re- 

 gretted that these were; not published in full at the date of their origin, as many valuable 

 suffsestions are found, now unfortunately for him forestalled by later students. That Dr. 



Do 



Zimmerman, even with a limited cabinet and library, was fully equal to and in many re- 

 spects in advance of Ins cotemporaries, there can be no doubt. 



P. picilabrum, Mel.s., Proc. Acad. :?, 61. 



This species and the next have the presternum between the coxae very convex, and 

 the apex depressed, obtuse and not prominent. In both the labrum is testaceous and the 

 antennae and legs ferruginous. This species has more deeply striate elytra with an amcous 

 tinge, the form is also more slender and parallel. 



Length .20 inch. 



Eastern, Middle and Western States. 



P. subcostalum, Lap. et Brulle, loo. cit. p. 862; elypeatum, Hald., Journ. Adad., Scr. II, Vol. I, p. 101. 



One of our largest and most abundant species in the Eastern and Middle States. Easily 

 known by the characters given in the table. The species has been considered americanum, 

 but the possession of an authentically determined specimen of the present species has 

 enabled me to determine the identity of llaldeman's species, as well as fix the value of 

 those otherwise labelled. 



Length .22-.2(> inch. 



Unknown species. 



P. poli tutu, Lap. et Brulli', loc. eit. p. 861. 



From the description this species does not differ from some specimens of americanum, 

 now before me. 



Length 3.5 lines, breadth 2 lines. 

 From Philadelphia. 



P. pall oris, Lap. el, lSiullc, loc. cit. p. 877. 



Probably an immature form of ruficome or possibly of janus. 

 Length 3, breadth 2 lines. 

 From North and South America, 



