THE CANADIAN EN rOMOLOGISl. 339 



In contrast with these works is one entitled " Deutschlands Wasser- 

 wanzen," by Th. Heuber.^ While "errare est humanurn," it appears to me 

 only reasonable for an author attempting such a subject to inform himself 

 of the most recent work on the matter. If this entailed an enormous 

 amount of bibliographical work, there might be some excuse, but where all 

 that is necessary is to consult, for instance, the "Zoological Record," it 

 seems to me that sucli negligence merits condemnation. 



The work in question consists of an account of the Waterbugs, based 

 on Fieber (1865) and Puton (1883). Necessarily, it is anything but 

 accurate as regards classification, forms, etc. Tables are given for genera 

 and species, with long descriptions, synonmy and localities. In anatomy 

 of Nepa, for example, he refers to Dufour (1833), Burmeister (1835), ^"^ 

 Flor (i860). All later (and really important) work is ignored. Korschelt 

 and Heider he knows not, and Heymons is but a name. It is really 

 regrettable that such work as this should be given to the public, especially 

 since by its appearance of usefulness, due to its dichotomies, it will 

 certainly enjoy some measure of repute. 



In this connection I wish to point out that while much that is to-day 

 written on the Aquatic Hemiptera is published in Hungary or in 

 Roumania, or even in America, there are authors who have written on this 

 subject in Europe, and what has not appeared in current English 

 entomological publications has appeared in the " AViener Entomologischer 

 Zeitung," the " Annales" of the French and Belgian societies and other 

 high-class continental mediums. Moreover, in book form there is Miall's 

 '• Natural History of Aquatic Insects," in which there is something regard- 

 ing Hemiptera. And finally, I wish to call attention to what is at the 

 moment the fullest account of European Waterbugs, and their habits, 

 namely, Kirkaldy's " Guide to the Study of British Waterbugs," which 

 appeared serially in "The Entomologist " at intervals from 1899 ^P to 

 last yeat (1907). There are several plates of structural details, and the 

 work as a whole summarizes the results of many investigators 

 supplemented by the author's original researches. While later study 

 controverts some few of his statements, nevertheless as a whole the work 

 is remarkably free from errors. As to what it purports to be, "A Guide," 

 it can be heartily recommended as a foundation for work on Waterbugs, 

 but it must be borne in mind that there is much later research work now 

 available in certain of the groups treated. 



3. Jahresheft, Ver. Vaterl. Naturk. Wurttemb., 61, 1905, pp. 91-175. 



