338 THE CAJ^ADIA^N ENTOMOLOGIST. 



fauna, endemic and immigrant, at not less than 500 species, of which 

 360 are endemic. 



In this paper several new genera are established, a number of new 

 species described; some synonymy cleared up, and, which makes it of 

 more importance to students of the Pacific fauna, a large number of 

 rectifications are made in the " Fauna Hawaiiensis." To enhance its 

 value, Kirkaldy gives us a table of the Asiracid genera. There are three 

 text figures of wing venation, and a plate of Homopterous genitalia, which 

 add greatly to the usefulness of the paper. 



Putting aside the debatable points, this is a really valuable contribu- 

 tion to Hemipterology, a fragment though it be. 



The third paper^ appeared in the Ohio Naturalist for June of this 

 year, under my name, but it is in reality a careful study of certain of the 

 fresh-water forms of the Gerrid subfamily Halobatinae, and includes what 

 is practically a monograph of Rheumatobates, by Dr. E. Bergroth. This 

 paper is of so finished a character that any comment on its quality 

 becomes superfluous. I wish, however, to call attention to it very 

 especially, and now note a few of its salient points. 



Dr. Bergroth begins by restricting and defining the subfamily Halo- 

 batince, which is characterized by having the inner margin of the eyes 

 convexly rounded. A discussion of Trepohates^ Uhl., follows, in which 

 this genus and its allies, Callistometra, Kuh.; Rheumatotnet^-a, Kirk.; 

 Metrobates, Uhl.; Telmatofnetra, Bergr. (gen. nov.), and Haiobatopsis, 

 Bianchi, are considered. The new genus Teimato??tetra is here charac- 

 terized, and is at once distinguished from its ally Trepobates by the 

 structure of the head, antennjB, corium and genital segments. One 

 species, Telmatometra Whitei, Bergr., is described in the genus. Next 

 in order, Rheumatobates prceposterus, Bergr., is described. This can 

 readily be separated from its described allied species by having the 7niddle 

 pair of legs curiously malformed in the '^ instead of the third pair, as in 

 other forms of the genus. This, of course, is apart from the excellent 

 character afforded by the peculiar $ antenn?e. Dr. Bergroth gives a 

 table for separating the known species, and figures their antenna. Taking 

 it altogether, this is a most valuable contribution to Hemipterology, and 

 indispensable to students of the semi-aquatic Trochalopoda. 



2. On the Aquatic Hemiptera collected by Prof. H. S. Hine in Guatemala ; 

 Ohio Naturalist, viii, 370. 



