226 THE CANADIAN ENTOMOLOGIST. 



indicated on both wings, but is usually absent, Discal spots showing 

 more or less on all wings as rather large spots, rarely as rings. 



Described from twelve male specimens collected by Mr. J. B. "Wallis, 

 at Winnipeg, Manitoba, May 25 to June 2, 1909. 



The species is quite different from any other North American 

 Selidosema, but closely resembles in general appearances Aids atrolineai-ia 

 Hulst and Cleora areataria Bwl. It is, however, different from both in 

 the absence of any indication of a hair pencil on the posterior tibia. 



The type is deposited in the Division of Entomology at the Central 

 Experimental Farm, Ottawa. Co-types are in the collections of Mr. J. B. 

 Wallis and the author. 



ON HALOBATOPSrS BEGINII ASHM. 



BY J, R, DE LA TORRE BUENO, WHITE PLALNS, N. Y. 



In the course of preparing a synopsis of the Gerridce of the Atlantic 

 United States (and consequently of the Eastern part of Canada), it has 

 been my endeavour to know at first hand, when possible, the forms to be 

 included therein, and among them, naturally, the one herein treated : 



Halobatopsis 754^/^// Ashmead, 1897, Can, Ent., XXIX:56; Banks, 

 1910, Cat. Nearc, Hem, Het., 26 ; H. Begini Bergr,, 190S, Ohio Nat., 



VIII:373-4. 



This species was overlooked by Kirkaldy and myself in our "Cata- 

 logue of American Aquatic and Semiaquatic Hemiptera,"* very fortunately, 

 as it turns out, since thereby we were prevented from assisting in the 

 perpetuation of an error ; an error which, in tlie absence of the types, 

 could not have been recognized from the description alone. In looking 

 up descriptions, types, etc., for my studies in Gerridae referred to, the 

 U. S, National Museum authorities have been most good in allowing me 

 the privilege of examination of their invaluable types and specimens 

 named by the authors of species themselves. Among this material figure 

 Ashmead's types (or what may pass as types, since they are from the type 

 locality) of the species under discussion, labelled by himself. They are 

 four specimens, in a more or less mutilated condition, three hemg pi/i/icd, 

 but nevertheless clearly recognizable is the inunatiire stages or nymphs of 

 two unrelated genera ! This fact has been established by careful com- 

 parison with long series of nymphs of the two species in question which 

 have been taken abundantly in company with the adults, viz.: Metrobates 



*Proc. Ent. Soc, Wash., X, pp. 173-215, 1908 (actual appearance in June 

 or July, 1909). 

 July, 1911 



