DYNASTIISLE 191 



as the prothorax, throughout as in lavicollis except that the front is 

 not impressed and the clypeal apex somewhat more broadly rounded, 

 though the small acute upturned teeth are barely less approximate; 

 prothorax more transverse, three-fifths wider than long, the evenly 

 and rather strongly arcuate sides more converging from the more 

 broadly rounded basal angles to the apex; punctures not coarse but 

 strong and distinct, sparse, becoming closer and stronger laterad; 

 anterior pit very small and feeble, rugulose, the tubercle small and 

 inconspicuous; scutellum with a few minute sparse punctures; elytra 

 but very slightly longer than wide, at or behind the middle distinctly 

 wider than the prothorax, rounded at apex; punctures coarse, deeply 

 impressed, rather close-set, each having a minute annulus at the 

 bottom, equally but confusedly arranged throughout, excepting in 

 the geminate series, which are more oblique than in the preceding 

 species and having the punctures close-set; punctures postero-laterad 

 finer and sparser, the sublateral geminate series finer and feebler; 

 pygidium sparsely, rather finely punctate, rugulose at the extreme 

 ends; mes-episterna pubescent, the met-episterna glabrous as usual; 

 in Iccvicollis this episternal distinction is not so marked. Length ( 9 ) 

 23.5-24.3 mm.; width 12.8-13.2 mm. Brazil (Amazons). [Tomanis 

 gyas Er.] *gyas Er. 



Mr. Schaeffer (Bull. Bk. Inst., I, p. 384) goes into some details to 

 prove the identity of bryanti Rivers, with lavicollis Bates, in which 

 comparisons the anterior tibije figure to a great extent. The tibial 

 characters are, however, of much less moment than some other 

 more general features, which, in the comparison, lead me to believe 

 that bryanti and Icevicollis are by no means exactly the same. We 

 may begin, for instance, with the size; Icevicollis is smaller, 18-22 

 mm. in length; then the color, the latter species is described as 

 black, while the normal color of bryanti is piceo-rufous; again we 

 may dwell upon some negative evidence, for, if the flanks of the 

 elytra postero-laterad were so completely smooth and polished as 

 they are in bryanti, it would seem almost certain that some allusion 

 to so striking a character would have been made by the describer. 

 Finally, we must take into consideration the question of faunistic 

 peculiarities; the tip of Lower California has a decidedly isolated 

 fauna, some elements of which extend to the northward along the 

 Gulf of California, but there are only very few which occur also in 

 the region near Mazatlan, Mexico, or to the southward thereof. 

 Now the localities for Icevicollis are said to be various places in 

 Guerrero, Chiapas and British Honduras, and I have but little 

 doubt that the series that Mr. Bates had before him, itself included 

 several distinct species or subspecies, especially when we read in 



