JOURNAL 



'Pf\a ]9oFh €fn]^oinQlogiraI ^oriFfg. 



Vol. XXI. JUNE, 1913. No. 2 



CRITICAL NOTES ON THE SPECIES OF HALIPLID^ 



OF AMERICA NORTH OF MEXICO WITH 



DESCRIPTIONS OF NEW SPECIES. 



By Chris. H. Roberts, 

 New York, N. Y. 



The writer has for several years been amassing material and 

 studying the structure of these very interesting water beetles with 

 the intention of writing a review or synopsis of the family. 



The recent publication of Mr. Robert Matheson's paper' perhaps 

 makes such a work unnecessary, at this time, and I will therefore 

 confine myself to notes, critical or otherwise, on the previously recog- 

 nized species and the description of others not seen, or overlooked, 

 by previous authors. In the study of the family I have examined, 

 individually, literally thousands of specimens and have had before 

 me, with few exceptions, anywhere from six to hundreds of speci- 

 mens of each species noted. 



I have had before me examples of all the species described up to 

 the publication of Mr. Matheson's paper, and all of his newly de- 

 scribed ones with the exception of Haliphis dcceptus, mimcticus and 

 vancoiivcrcnsis, which three species I have not seen, or am unable to 

 recognize. 



The first two should not be hard to determine, with the aid of his 



plate of elytra, but the description of vancouvercnsis is so indefinite 



that it would fit several species when all reference to color markings, 



^Journal of the N. Y. Ent. Society, Vol. XX, page 156, September, 1912. 



91 



