REVISION OF ELEODTINT BLAISDELL. 171 



do not clasp the prothoracic base ; the prothorax is more or less wider 

 at middle than at base. Another distinguishing character is the 

 feebly caudate elytra. 



I have seen specimens of sti'iolata labeled /^/iv'/oyv/^/.v in collections — 

 large examples of the latter may simulate the former by having the 

 elytral punctures arranged in closely placed series. The tarsi in' the 

 two species are longer and more slender than in the other species of 

 Protnus, opaca excepted. 



At the time of writing the Revision Doctor Horn had but three 

 females before him and he had some doubt about placing the species 

 in the present subgenus. I can not find any mention in the literature 

 of a male ever having been studied. 



I have a series of eight males before me and find them to be true 

 Promus. 



The mentum is quite triangular, w4th apex rounded, in the speci- 

 mens examined, and the surface is more or less convex at middle and 

 foveate laterally. 



LeConte writes that the prosternum is horizoutally produced and 

 acute. In the series at hand I find it quite homogeneous — rounded 

 antero-posteriorly between the coxa? and gradually, more or less 

 evenly sul)conically mucronate behind. The mesosternum moderately 

 oblique, feebly arcuate, broadly and more or less deeply concave. 



The tibial grooves of the femora are not well developed and are 

 rnqre or less concave and glabrous, impunctate. Those of the pro- 

 femora extend to about the middle and are inwardly attenuate, some- 

 times obsoletely indicated to the base; margins obtuse, rarely sub- 

 carinate, the anterior margin being usually simply dentately laminate 

 to produce the tooth in the male; in the female the anterior grooves 

 are generally quite concave and well defined. 



Those of the meso- and metafemora seldom extend inward to the 

 middle, rarely more than the outer third and are more or less poorly 

 defined ; at times the posterior gi'ooves are short and evanescent in 

 the females. 



The external surfaces of the tibia? are rounded, and in the exam- 

 ples before me not in the least carinate; the tarsal grooves are obso- 

 lete, those of the mesotibise being frequently indicated, the external 

 surface is occasionally flattened. 



The anterior tarsi are distinctly more robust in the male than in 

 the female. 



Tarsal formula : 



Pro. Meso. Meta. Metatibise. 

 Male.— 3 4| 5 8| 



Female.— 21 4 4|- 7 



