AMERICAN COLEOPTERA. 309 



The very small Lower Californian species, more recently described 

 by Horn as Scythropus delicatulus is not a Scythropiis at all. The 

 rostral characters are very different from Scythropus, the divergent 

 alse and long scrobes being nearly as in Oyphomimiis. In Scxjthro- 

 pus the tibife are mucronate in both sexes; in delicatulus they are 

 nmcronate in the male only. There are also antennal and abdomi- 

 nal differences, and the coloration is not Scythropoid in type. It is 

 probable that a new genus will be found necessary when the Otio 

 rhynchidie shall have been properly revised. 



Two new names appear in the following tabular statement, follow- 

 ing which will be found brief descriptions. It has of course been 

 necessary to use the characters given by Captain Casey, for the sepa- 

 ration of the species described by him, and as yet unknown to me. 



Scales of elytral disk more, or less mottled, especially toward the suture. 



Antennal scape long, slender, passing distinctly beyond the posterior margin 

 of the eye. 

 Body black, legs rufous; vestiture denser, scales of upper surface from one- 

 half longer than wide to twice as long as wide californiciiM. 



Body ferruginous throughout; vestiture sparser, scales much more elongate, 

 at least three to four times as long as wide, and at certain parts of the 

 elytral disk— notably in the scutellar region^quite hairlike. 



f'errugiiieiis. 

 Antennal scape short, robust, arcuate, just passing the posterior margin of the 



eye crassicornis. 



Scales of elytral disk not mottled, the sides and sutural interspace usually paler. 



Elytra tumid at the sides along the humeral iuterval lateralis. 



Elytra evenly convex at sides. 

 Anterior tibiae of male distinctly arcuate toward the apex, the inner and 

 outer margins nearly parallel ; fourth funicular joint subequal to the 



tliird elegans. 



Anterior tibise of male less evidently bent toward the apex, the outer mar- 

 gin more broadly arcuate, inner margin more strongly sinuate or 

 roundly emarginate in apical half. 

 Elytral vestiture relatively spaise, the scales well separated, uniformly 

 cinereous; elytral intervals with a row of erect scales; funicular 

 joints uniformly and rather rapidly decreasing in length cinereiis. 

 Elytral vestiture dense, suture and sides paler; erect sette almost entirely 

 wanting, visible only on the declivity, where they are short, subre- 

 cumbent and inconspicuous; fourth funicular joint usually ilistinctly 

 longer than the thij-d. 

 Prothorax more transverse ; scales of elytra much broader, averaging 

 about one-half longer than wide, those of intervals 2-6 but slightly 

 darker than those of the sutural and outer intervals, ashy white, with 



faint greenish lustre albidiis. 



Prothorax less transverse; scales of elytra more elongate, fully or more 



TRANS. AM. KNT SOC, XXVII. NOV., 1901. 



