246 MEMOIRS ON THE COLEOPTERA 



erect setae; prothorax transverse, fully two-thirds wider than long, 

 inflated and rounded at the sides, the latter very strongly oblique 

 before the middle, becoming feebly sinuate to the apex, which is 

 only two-fifths as wide as the base; apical horn long, strongly recurved 

 toward apex, the tip very acute, abruptly flattened on its anterior 

 face, finely and sparsely punctate, the two posterior horns feebly 

 arcuate, slender, acutely pointed and two-thirds as long as the apical, 

 having very minute sparse punctures throughout the general surface, 

 which is completely devoid of rugosity, except at the sides near the 

 base of the horns and very narrowly along the basal margin laterally; 

 cavity smooth, polished, divided by a large convex ridge, forming a 

 prolongation of the convex surface of the anterior horn; scutellum 

 ogival, smooth, with coarse discrete punctures at base; elytra fully 

 as wide as long and rounded in less than posterior half, as wide 

 as the prothorax and three-fourths longer, smooth, with very 

 minute sparse simple punctulation, having two or three discal and a 

 sutural feebly impressed line, the sutural becoming a deep stria 

 in apical third or fourth; side margins with a rather coarse smooth 

 gutter, the flanks near the base with two submarginal impressions; 

 pygidium less than three times as wide as long, very convex, sub- 

 asperately punctate and with coarse hairs in about basal third; post- 

 coxal plate with rounded external angle and irregularly scattered 

 punctures; tibiae spurs very large and long; hind tarsi shorter than 

 the tibiae, the basal joint slender, nearly three times as long as wide. 

 Length (cf) 35.0 mm.; width 20.3 mm. Gulf states (locality un- 

 recorded). A single fully developed example divergens n. sp. 



Posterior thoracic horns in fully developed males parallel, though with 

 the usual moderate even arcuation, always finely pointed at tip as 



in the preceding 4 



4 Upper surface of an intense highly polished black throughout, cas- 

 taneous beneath, the anterior tibiae blackish, notably broad, very 

 strongly toothed, the fourth or uppermost tooth small as usual. 

 Body stout, oblong; head small, much less than a third as wide as the 

 prothorax and, as in the others, relatively smaller than in the pre- 

 ceding subgenus, coarsely rugose but shining, the front unmodified, 

 except by some irregular swirling of the rugae, the convex external 

 slopes of the clypeal apex, which is not at all reflexed, sparsely punc- 

 tate, the apex obtusely rounded, with a minute acute median denticle, 

 the median mandibular tooth as in the preceding but more conical; 

 mentum smoother medially; prothorax in form nearly as in the pre- 

 ceding and similarly sculptureless, except that there is no trace of 

 the rugulosity at the basal margin, there being merely a feeble 

 coarse impression along the basal bead near each side; apical horn 

 still longer, more abruptly and strongly recurved apically, less 

 punctured and more bilaterally compressed; posterior horns three- 

 fourths as long as the apical ; ridge dividing the concavity more sharply 

 rounded than in divergens; there is similarly no trace of rugulosity 

 within the concavity; scutellum nearly similar; elytra even shorter, 

 scarcely as long as wide, barely as wide as the prothorax and but 

 two-thirds longer, the surface similar, except that all discal impressed 



