378 MEMOIRS ON THE COLEOPTERA 



Gnorimella n. gen. 



The type of this genus has always figured in our lists as a species 

 of Gnorimus, but on comparing it with the European Gnorimus 

 variabilis and nobilis of Linne, no close affinity can be discovered; 

 the American maculosa has an absolutely different habitus and that 

 it forms a different genus admits of no doubt whatever. In intima- 

 ting that, in the opinion of the authors (Class. Col. N. A., p. 263), 

 Gnorimus might very well be united with Trichius, they could not 

 possibly have even seen the European species, either of Gnorimus 

 or Trichius, for, while it might be plausible to assume that a close 

 relationship exists between maculosa and Trichius, although the 

 resemblance is closer with the true Trichius of Europe than the 

 American forms here generically separated, the idea of associating 

 Gnorimus variabilis with Trichius would be preposterous. A fuller 

 realization of the differences involved can, in the absence of careful 

 figures, best be gained by a full description ; the principal characters 

 of the type of Gnorimella are as follows: 



Form somewhat ventricose, feebly convex above, black, rather shining, 

 the elytra opaque and pale yellowish-brown, with numerous black 

 spots, generally having a triserial arrangement on each, the subapical 

 spot the largest, the basal and sutural region free from maculation, 

 excepting the humeral umbo, which is always black and polished, 

 the base, scutellum and fine sutural ridge also shining; head, pro- 

 notum and sterna with long, dense and conspicuous yellowish pu- 

 bescence, the elytra glabrous; head rather finely, very densely punc- 

 tate, the clypeus sparsely, with the apex strongly reflexed and deeply, 

 medially sinuate (cf), or scarcely at all reflexed and with a shallower 

 sinus ( 9 ) ; vertex sometimes with a narrow median line of yellowish 

 tomentum; antennal club as long as the stem, shorter in the female; 

 prothorax trapezoidal, two-fifths wider than long, widest near basal 

 third, the sides arcuate, becoming oblique and straight anteriorly 

 from behind the middle; apex truncate, three-fifths as wide as the 

 base, which is broadly and strongly lobed; surface with deep, 

 moderate, very close-set punctures, even in distribution but obsolete 

 in the spots of tomentum, which are variable in development, there 

 being four forming a subbasal square, one median and anterior and 

 about four toward the sides, of which the anterior and posterior 

 are the largest, all the lateral spots often obsolete; scutellum semi- 

 circular, densely punctate, smooth peripherally, except at base, and 

 generally with a large central spot of tomentum subobliterating the 

 punctures; elytra slightly longer than wide, subparallel, the sides 

 feebly arcuate, straighter and feebly converging behind the middle, 

 each broadly arcuate at apex, one-half wider than the prothorax; 

 punctures fine, sparse, confused suturally, in several series medially 



