170 <iEO. H. HORN. M. r». 



X. planicornis Laf. — Moderately elongate, rufo-testaoeous. finely pubes- 

 cent: elvtra with st-utellar spot, median and ante-apical bands piceous: head 

 rather shining, verv sparsely punctulate, scarcely pubescent, front concave ,: thorax 

 nearlv spherical, shining, very sparsely finely punctured, and with very little pu- 

 bescence, horn stout and broad, margined, serrate at the sides, the crest not ele- 

 vated, its margin indicated by a few slight tubercles: elytra oblong, humeri dis- 

 tinct, apices conjointly rounded : disc distinctly obliquely impressed behind the 

 humeri: surface moderately shining, punctuation moderate, not dense: body 

 beneath extremely finely punctured and sparsely pubescent. Length .12 inch : 3 

 mm. 



The male ha.s the last ventral segment truncate at tip with a slight 

 triangular impression. 



This species greatly resembles monodon. especially that form with 

 feeble crest. It may. however, be known by the very fine pubescence, 

 without trace of erect hairs, and by the oblique impression of the base 

 of the elytra. 



One specimen. Capron. Florida. 



\. apicalis Lee. — Elongate, testaceous : elytra with scutellar spots, post-me- 

 dian sinuous band and apex piceous: head sparsely punctulate and pubescent, 

 with verv few erect hairs, front flat: thorax relatively small, globose, sparsely 

 punctulate and shining, feebly pubescent, horn rather narrow, strongly margined 

 in front, the sides feebly serrate, crest sudilenly and rather strongly elevated, mar- 

 gined, not serrate: elytra rather eloncjate, liumeri distinct, apices conjointly 

 rounded in both sexes, feebly shining, moderately punctate, the punctures much 

 finer at apex, pubescence rather short and recumbent, intermixed with erect hairs 

 arranged in rows, markings closely, resembling monodon, with the tip also piceous: 

 bodv beneath very finely punctulate. and with fine silken pubescence. Length 

 .Irt inch : 4 mm. 



The thoracic horn is plainly narrower and longer in the male, and less 

 obviously serrate at the .sides. The la.st ventral segment is very distinctlv 

 truncate and transversely concave, but not foveate. 



The markings on the elytra are very nearly those of monodon, with 

 the addition of an apical piceous Vjorder. which in some specimens ex- 

 tends narrowly along the suture, and even the sides, to join the transverse 

 band. 



To this species I refer some specimens from the high Sierras of Cali- 

 fornia, which have the thoracic horn a little wider and the pubescence 

 coarser. The elytral marks have nearly entirely disappeared. 



Ocpttrs from Michigan to Kansas. Texas and California. 



N. calcaratus n. sp. —Rufo- testaceous, coarsely pubescent : elytra with apex, 

 median broad sinuous fascia and scutellar spots piceous: head sparsely punctate, 

 front slightly concave, sparsely clothed with hair, much of which is erect; thorax 

 transversely oval, sparsely rather finely punctate, the horn broad and stout, dis- 

 tinctly margined and coarsely serrate at the sides; crest abruptly elevated, 



