38 1 REVISION OF Till: TENEBRIONIDiE OF AMi:KI \. 



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

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

 scutellar stria is aim isl to i Ij obliterated and r pi ic d l>\ a single larger and many small 

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

 and rather more deeply i a ived in the mesosternum than usual. 



The above description and the substance of the remarks arc 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 

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

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

 spects in advance ofhis cotemporaries, there can be no doubt. 



I', picilabrum, Mels., Proc. Acad. 8, 61. 



This species and the next have the prosternum between the coxae verj convex, and 

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

 antenna- and legs ferruginous. This species has more deeply striate elytra with an aeneous 

 tinge, the form is also more slender and parallel. 



Length .20 inch. 



Eastern, Middle and Western States. 



P. bu b cost atum , Lap. et Brallu, toe. cit. p. 362; clypeatum, Hald., Journ. Acad., Ser. II, Vol. 1, 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 Haldeman's species, as well as ti\ the value of 

 those otherwise labelled. 



Length .22-.26 inch. 



Unknown species. 



I'. i>o 1 i t u in , Lap. el Brulle, loc. cit. p. 361. 



From the description this species do r s not differ from some specimens of americanum, 

 now before me. 



Length '■>.'> lines, breadth 2 lines. 

 From Philadelphia. 



P. pallcns. Lap. el Brulle, loc. cit. p. :!?T. 



Probably an immature form of rtijivorne or possibly of jnnu*. 

 Length 3, breadth 2 lines. 

 From North and South America. 



