51 



I have retained as distinct in tlie table certain species with 

 rather indefinite characters, which larger series, and better know- 

 ledge of geographical distribution will hereafter cause to be 

 placed as varieties or races. 



They are as follows 



1. Sp. 17 and 18. P. extensicottis and simplex, which differ on iy 

 in the comparative depth and size of the basal impressions of the 

 prothorax. 



2. Sp. 20, 21 and 22. P. cali/ornicus,fioridantts and lexanus. I con- 

 sider these as slight modifications of a single sf>ecies, having the 

 same distribution as several other less plastic forms of Coleoptera, 

 which I have noted on a former occasion. (Proc. Am. Phil. Soc. 

 1878, 470). In the present condition of science, I am not war- 

 ranted in including them under the earliest name, califvrnicus. 



3. Sp. 52 and 53. P. striatopunctatus and crenulatus, the series 

 before me is hardly sufficient to warrant me in uniting these 

 forms, though I but little doubt that it must 1 eventually be done. 

 and I have therefore not changed the names in accordance with 

 the suggestion of Baron Chaudoir, (vide Trans. Am. Ent. Soc. 

 1869, p. 248), 



4. Sp. 78, 74 and 75. My series is almost large enough to indi- 

 cate that these three, P. crenistriatus, rubripes and punctiformis 

 should be united under the last name, which has priority. 



The following names are unnecessary and should be dropped : 



P. bicoloratus Munich Cat. 368, proposed for P. bicolor,f Lee 

 which (No. 16, var. a.) u a color variety of brunneomarginatois. 



P. mutatus, ibid. 374, is proposed for P. dtratus, Lee. Agassiz 

 Lake Superior, 205, (1847), while atrattis,\\ Blanchard, (1853) is al- 

 lowed to remain. 



P. tenebricosus, ibid. 377, is proposed for Anch. marginatus,|| 

 Menetr. Bull. Petrop. II. 56, which is— brunneomarginatus, Mann. 

 Bull. Mosc. 1843. 



The following names are valid corrections, and worthy of being 

 adopted. 



P. propinquus, Munich. (Ait. 37 '5. ==Anchoinenus piceus,\ Lee. 

 The duplication of name was produced by the merging of Ancho- 

 menus and Agonum into Platynus, but by inadvertence was nol 

 noticed by me. No. 38. 



P. vicinus, Munich Gat. 377,~JP. consimilis,\ Lee. (No. 67). 



