Dec, igij-] Shaeffer: Xotes on Chrysomelim:. 317 



Donacia tuberculata Lee. 



This species has the head behind the eyes a little more constricted 

 than in harrisi but less so than in any of our other species. The 

 smaller eyes of harrisi mentioned by Leconte and others as a peculiar 

 character is shared by other species of both subgenera but with the 

 exception of tuberculata the head in these is more strongly constricted 

 behind which gives them a more prominent appearance. 



Donacia harrisi Lee. 



It may be of interest to those using Mr. Blatchley's Coleoptera of 

 Indiana to know that the species identified there as harrisi is not that 

 species. It is a new species belonging in the subgenus Plateumaris. 

 In reading over his description and remarks on that species I received 

 the impression that this species is much more variable than known 

 and asked Mr. Blatchley for the loan of a few specimens. He kindly 

 sent me a single specimen, all he had, which proved to be as stated 

 above. 



Donacia pusilla Say. 



As defined by Mr. Leng in his revision a number of more or less 

 distinct forms are included under this name. 



Of the true pusilla I have specimens from Xew Foundland, Maine 

 and Massachusetts. These have the second and third antennal joints 

 subequal in length, the fourth a little longer than third, the outer four 

 or five joints very distinctly wider than the preceding joints, especially 

 in the male, the elytral indentations generally deeply impressed, the 

 posterior femora moderately closely punctate and armed with a rather 

 small tooth. There is another eastern species which I find generally 

 mixed with this and which probably is dives Lee. placed as a synonym 

 of pusilla. These have longer antennal joints and the outer four 

 or five are scarcely wider than the preceding; the prothorax is 

 similar, but generally a little wider; elytra with feeble indentations 

 and generally more densely punctate and rugose; the posterior femora 

 are stouter, closely punctate and armed in both sexes with a rather 

 large, triangular tooth. The legs in both are red, femora with or 

 without metallic space near apex. Certain emarginate with rugose 

 prothorax and median line very feeble may cause trouble as to their 

 correct place, but these have generally a still larger tooth on the 



