80 THE VOYAGE OF H.M.S. CHALLENGEE. 



been found, but very rarely. Though Gennar is cited as the author of this 

 species, it was described by Herrich-Schiiffer. 



3. Halobates platensis, Berg. (Hemiptera Argentina, p. 183, No. 220, 1879), is a fresh- 



water species from the Argentine Eepublic, probably congeneric with Stephania 

 picta. 



4. Halobates (?) orientalis, Distant (Trans. Ent. Soc. Lond., p. 126, 1879), is an Indian 



fresh-water species, which the author now admits (Scientific Eesults of the 

 Second Yarkand Expedition, Ehyuchota, p. 13, No. 38, 1879) does not belong 

 to Halobates though allied thereto. 



I may mention that Mr. Murray has shown me drawings and description (made by 

 Sir J. D. Hooker) of a Halobates taken during Sir James Ross's Antarctic Voyage. 

 The species figured appears to belong to an undescribed form, but as Sir J. D. Hooker 

 tells me that the specimens have unfortunately been lost, nothing more can be said 

 about it. 



Halobates 'p''inccps $ 



At the moment of going to 23ress, I have received, through the kindness of Professor 

 Bogdanow of the Moscow Museum, the loan of two specimens of the species referred to in 

 Professor Semper's note (p. 22). They seem to be males of my Halobates ])rince2)s. 

 The third genital segment above is comparatively narrow, six-sided, and with the usually 

 prominent lateral angles truncate, so that the segment is parallel-sided in the middle. 



