160 Journal New York Entomological Society. [Vol. xm. 



Long., II. 8 mm. to 14. 4, lat., 3.6 to 4.7 mm. 



Distribution. — My collection: Laval Co. and Montreal, Quebec; Ihaca, 

 Putnam Co., Van Cortlandt, Staten Island and Long Island, N. V.; Palisades, 

 Railway R., Westfield, and Delair, N. J. ; Baltimore, Md.; Washington, D. C; 

 Lake Forest, Ills.; Columbus, Ohio (also recorded in 31). U. S. National Museum ; 

 Rhode Island ; Lake Maxincuche and South Bend, Indiana. Buffalo, N. Y. (53), 

 Tennessee (39), Madison, N. J. (38), and " U. S." (49). Keene Valley, X. V. 

 (State Museum), Wellington, Ohio, and Bladensburgh, Md. (Coll. Heidemann). 

 Montana (Coll. Van Duzee). Michigan, Kentucky. 



The habits of this handsome bug are covered in the first part of 

 these notes. It may not be out of place to call attention to a pecu- 

 liarity it possesses in common with the other colored forms of the 

 genus. On being removed from the water it has an evanescent bluish 

 tinge on the hemielytra, caused doubtless by the pile that covers them. 

 The same phenomena I have noted in N. uhleri and N. insula la. 



8. Notonecta lutea Muller. 

 Notoneda lutea. 



1776. O. F. Muller, Zool. Dan., p. 103.* 



1 8 14. Fall., Hydr. et Nauc. Swecia;, p. 6. 



1S51. Fieb. " Rhynchotographieen," Abh. Bohm. Ces. Wiss. (5), vol. VII, 

 I' 47.v (Separate, p. 49.) 



1 85 1. Lieb. Gen. Hydroc, p. 26. 



1S60. Flor. Rhynch. Livl., vol. I, p. 774.* 



1S60. Fieb., Eur. Hem. (1), p. 100. 



1875. J. Sahlbg., Not. Sallsk. Faun. Fenn. Forh., vol. XIV, p. 274. 



18S0. Puton, Hem. Fr., pt. 4, p. 218. 



1891. Duda, Klub. prirod. Praze, p. 13, pi. IV, fig. I.* 



1897. Kirk., Tr. Ent. Soc. Lond., p. 425. 



1904. Bueno, Ent. News, vol. XV, p. 220. 



I904. Kirk., Wien. Ent. Zeit., p. 132. 

 N. unicolor. 



1835. Herr.-Sch., Nomencl. Ent., p. 63.* 



184S. Herr.-Sch., Wanz. Ins., vol. VIII, p. 23.* 



Description. — "Head large, notocephalic lateral margins slightly diverging 

 from the base, vertex two to two and a quarter times as wide as synthlipsis. Entirely 

 luteous (except the dark claret eyes, occasional dark-brown markings along the 

 sutures of the clavus, etc., the bronze-brown sternal hair-tufts, the black unguiculi 

 and venter). Scutellum a third wider than long. Exterior lobe of membrane 

 about half the size of the interior lobe and obviously not so long. Alar nervures 

 luteous. Pedes: spine on intermediate tibia large, acute, black-tipped." (Kirk., 

 Rev., p. 425.) 



Long., 13 to 17. 1 mm., lat., 4.5 to 5.5 mm. 



Distribution. — In Europe, Lapland, Finland, Sweden, Bohemia, Austria; in 

 Asia, Siberia. North America, Bearfoot Mts., B. C. These localities are all taken 

 from the various works cited, except the American, which is from specimens in my 

 ci plleciion. 



