252 MEMOIRS ON THE COLEOPTERA 



Carolinian, I have attached it to mormon, with an expression of 

 doubt; it may really be merely a splendens having an unusually 

 acute clypeal apex, there being some variability in this respect, 

 as well as in other directions, in all the species. Both this name and 

 maimon should be dropped from the literature, as the descriptions 

 are completely indefinite and useless. There might be some 

 propriety in the suggestion of subgeneric isolation for mormon, 

 because of the peculiarly long and slender mandibular tooth, setose 

 patches on the vertex and radically different pygidium, especially 

 in the male. Whether or not the male specimen described above 

 is a depauperate form, the complete stage having long thoracic 

 horns, I am unable to state. 



Examining carefully the surface of the elytra, for instance in 

 atrolucens, quite a complex sculpture is revealed in what appears 

 at first glance to be a perfectly smooth polished surface. In the 

 first place, we have very minute sparse simple punctures, then, 

 scattered among these punctules there is a sparse system of very 

 small feeble pustules, wholly disconnected with any kind of punctua- 

 tion, and, thirdly, over the entire surface, between the sparse 

 pustules and minute perforate punctules, there is close-set, extremely 

 minute and feeble pustulation, which is also not connected in any 

 way with apparent punctures.* 



Xyloryctes Hope. 



This genus is entirely isolated in our fauna and does not bear any 

 resemblance whatever to Strategus and allied genera, which, 



* Since this revision of Strategus was written, I have received a paper by Mr. Charles 

 Schaeffer (Journ. N. Y. Ent. Soc., 1915, p. 47), in which appears the following para- 

 graph on page 5 1 : 



"Strategus julianus var. arizonicus new variety. 



"Two fully developed male specimens from Prescott, Arizona, in my collection, 

 differ from specimens from Texas by having the lateral prothoracic horns acute or 

 subacute, and not broad and more or less obliquely truncate at apex as in typical 

 julianus; the median ridge of prothorax is flatter and the lateral impressions are not 

 as deep as in typical julianus and feebly or not at all rugose; the clypeus is acutely, 

 triangularly emarginate. The female does not differ from typical julianus." 



If it were not for the emarginate clypeus, I should say that this form might be 

 allied to jugurtha Burm., which also has slender thoracic processes. It is apparently 

 not closely allied to anything here described. In some respects it agrees with the 

 Texas species above described under the name roosevelti, but there the apex of the 

 clypeus is very obtuse and feebly sinuato-truncate, and I think if the surface of the 

 clypeus were as finely and sparsely punctate as it is in roosevelti, this feature would 

 surely have been mentioned. 



