DYNASTIISLE 177 



arcuate, the edge broadly thickened at the middle but barely at all 

 more prominent laterally; punctures very small, shallow, very sparse 

 and inconspicuous, each a minute closed ring; the four double series 

 are evident but not at all conspicuous, the punctures in their com- 

 pletely unimpressed bounding series widely spaced, the inclosed 

 areas perfectly flat and similar to the rest of the surface; pygidium 

 glabrous and smooth, broadly angulate at apex and more obtusely, 

 angularly sinuate anteriorly; propygidium covered by the elytra; 

 tarsi slender, much shorter than the tibiae. Length (9) 20.0 mm.; 

 width 9.7 mm. Brazil (Esp. Santo) *eucephalus n. sp. 



Differs from alliaceus in the apparently finer elytral punctures, 

 having the form of minute closed circles, and less abbreviated 

 pygidium, also in its bicolored upper surface, the elytra not being 

 paler in that species; from fuliginosus it differs in the much finer 

 punctures throughout the upper surface and in the flat costular 

 intervals. 



Stenocrates Burm. 



My collection contains at present only two species of this distinct 

 South American genus, laborator Fabr., and cultor Burm. Steno- 

 crates seems to include but few species, which are distinguishable 

 among themselves by strongly differentiated sculptural features; 

 in laborator, for example, the pronotum is not at all punctured 

 except toward the sides, where the punctures are strong and con- 

 spicuous; in cultor, they are uniformly distributed and strong 

 throughout; in both, the side margins are very thick and convex, 

 but especially so in laborator, which is said by Mr. Bates to occur 

 also in Mexico. 



Tribe PENTODONTINI. 



LeConte, following Lacordaire, makes of this division of the 

 Dynastinse a simple group of the Oryctini, and, in many features 

 of general structure as well as formation of the tarsi, there is un- 

 deniably a close inter-relationship, but, because of the almost 

 complete absence of sexual modifications of the head and pronotum, 

 I would prefer to consider the Pentodontids as a tribe distinct from 

 the Oryctini, as held by Bates and others. That the Pentodontini, 

 in spite of their Oryctid affinities, occupy an intermediate position 

 in the series, is shown by the fact that in several of the genera, the 

 anterior tarsi of the male are modified exactly as in the Cyclo- 

 cephalini, and some of the species of Ligyrodes, such as ebenus, 

 T. L. Casey, Mem. Col. VI, Oct. 1915. 



