37O MEMOIRS ON THE COLEOPTERA 



wider than long, the sides just visibly converging from base to apex 

 and slightly sinuate at the middle, the exterior of the apical angles 

 continuing the lateral outline and bearing internally, on the oblique 

 surface, a dense mass of fulvous setae; base transverse, without sinuses 

 adjoining the basal angles; surface medially depressed basally, feebly 

 impressed along the middle and with small shallow punctures, the 

 punctures laterally smaller, very sparse, wanting toward the apical 

 and basal angles; elytra oblong, parallel, not quite one-half longer than 

 wide, obtusely rounded at apex, fully a fifth wider than the prothorax, 

 the subapical umbones small and prominent, the humeri not promi- 

 nent, the callus polished; surface flat, with elongate-oval, shallow, 

 rather widely separated and very opaque areolae, convex and then 

 very declivous at the sides, where the punctures are fine and very 

 sparse; pygidium moderately convex, with small sparse shallow areolae 

 and feebly subcarinate along the middle; abdomen very opaque, not 

 coarsely, rather closely punctured and with short yellowish plumose 

 hairs, closely placed throughout, the apices of all the segments 

 bearing a dense even spongiose fringe; legs polished, black, smooth, 

 with very fine sparse punctures, rather compressed, the hind tibiae 

 but little narrower than the femora and with a small spiculiform 

 tooth externally beyond the middle, the hind tarsi three-fourths as 

 long as the tibiae and strongly compressed; anterior tibiae rather 

 broad, bidentate apically. Length 10.7-11.1 mm.; width 4.7-4.9 

 mm. Nebraska and Colorado. [ Crem. wheeleri Lee.], .wheeleri Lee. 



This is the most isolated species in this part of the series and the 

 extraordinary abdominal modifications are not suggested, even 

 vestigially, in any other known to me. It does not seem to be 

 abundant and my series consists of but four examples; these are 

 remarkably uniform in size, as is the case also among the individuals 

 of saucia and probably all others of this genus. 



Tribe TRICHIINI. 



The chief distinguishing character of this tribe is the absence of 

 the post-humeral sinus at the sides of the elytra, constituting so 

 constant a feature in all the preceding Cetoniids; the mes-epimera 

 are sometimes indistinct from a dorsal viewpoint, but in Osmoderma, 

 are as conspicuous as in most of the subfamily. The species are 

 small and floricolous as a rule, most of them with very elongate 

 slender tarsi, but the genera Inca and Osmoderma are composed of 

 species much larger in size and of less active habits. We have 

 within our faunal limits the following six genera, most of the 

 characters being as stated by Lacordaire: 



Hind coxae contiguous; basal joint of the hind tarsi moderately elongate. 2 



