BEMBIDIIN.E 139 



radense, are so manifestly incongruous, that that species, from the 

 mountains of southwestern Colorado, must assuredly be a different 

 thing. It is singular that no example of the bright cupreous species 

 from idoneum to continens, described above, appears to have fallen 

 under the observation of earlier writers; obseqtiens is so much smaller 

 and narrower than typical idoneum, that additional material may 

 prove it to be specifically distinct. 



As remarked by LeConte, the Marquette specimens identified 

 above as nigripes Kirby, are apparently so much smaller than Kir- 

 by's measurements would indicate, that they may not properly 

 represent that species, but whether identical or not, they at least 

 belong to a very isolated species of the subgenus. My two speci- 

 mens of umbratum Lee., are much smaller than the average given 

 by LeConte and Hayward, but I have reason to believe that the 

 species is truly represented by them ; it is to be noted that the closely 

 allied variolosum also varies unusually in the size of individuals. 

 The Mexican semifasciatum Say belongs to the subsection augurale 

 simulator, as limited above. 



The species peculiar to the Pacific coast regions, generally with 

 rather convex surface and always having the elytral maculation 

 more or less obscure, are much more numerous than I had antici- 

 pated before studying them attentively, and I am under some doubt 

 concerning the identification of approximation and consentaneum of 

 LeConte; those selected agree with the original inadequate descrip- 

 tions, but the matter could not be settled conclusively without ac- 

 tual comparison with the types if they still exist. Gulosum is re- 

 lated apparently to suspectum Blaisd., but the prothorax is oblique 

 at the sides in fully basal half, the anterior thoracic angles are less 

 bluntly rounded and the maculation of the elytra is somewhat dif- 

 ferent. 



It is to be regretted that the erroneous identification of varie- 

 gatum Say, with patruele Dej., whoever may have been responsible 

 for it, should have taken so permanent a hold as to be repeated by 

 Mr. Hayward, for it is this error that caused Dr. Hamilton to 

 describe his postfasciatum as a new species. Referring to Say's 

 description of variegatum, it may be seen that its resemblance to 

 dorsale is so close, especially in the peculiar type of elytral ornamen- 

 tation, that the author was in some doubt whether it should not 



