DYNASTIN/E 271 



my male of Hiatus there is no trace of the faint apical thoracic 

 tubercles mentioned under vitulus. 



The following species was sent to me some years ago under the 

 name Phileurus affinis, but it bears no close resemblance to it and 

 is allied to valgus: 



*Phileurus clathratus n. sp. Distinctly narrower and more elongate 

 than valgus but similar in color, lustre, depressed upper surface and alter- 

 nately more prominent elytral intervals; head similar, two-fifths as wide 

 as the prothorax, the latter exactly as in valgus in general character, but 

 with the parallel sides much less strongly arcuate and with the depression 

 behind the apical tubercle a little larger and not impressed so evidently 

 by the continuation of the median sulcus; anterior coarse sculpture more 

 transversely ruguliform; scutellum smoother and more sharply ogival; 

 elytra with similar close-set pairs of very coarse sulci, separated by 

 wider and more convex intervals, but with the coarse punctures of these 

 sulci very different; they are not rounded and well separated as in valgus, 

 but so close-set a? to be separated by slender transverse bars, giving them 

 a quadrate appearance; pygidium of the male convex, shining and with 

 coarse deep sparse punctures throughout. Length (<?) 21.0 mm.; 

 width 9.4 mm. Brazil. 



The elytra in the type are fully two-fifths longer than wide and 

 fully as wide as the prothorax, the latter being much less transverse 

 than in valgus and barely more than a third wider than long. 

 Although a member of the valgus group this is a valid species and 

 in no way properly of a subordinate nature. 



Archophileurus Kolbe. 



This genus is well founded upon the Phileurus cribrosus of Le- 

 Conte, a species bearing but little resemblance to any of those 

 described above; the body is of short, suboval and more convex 

 form, and all the species are of very small size for the present tribe. 

 The head differs radically in having no trace of the posterior 

 tubercles or horns of Phileurus, but has a transverse discal ridge, 

 of which there is never the faintest trace in that genus. Besides 

 this, there are no anterior thoracic modifications, and the second 

 elytral interval is similar to all the others. In the male, the pygid- 

 ium is much more swollen and tumidulous medially, it being 

 evenly and feebly convex in the female, though, because of being 

 hidden in great part under the elytra in that sex, I am unable to 

 describe any possible basal modification. So far as known among 

 mv limited material, the female is rather smaller than the male as 



