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



cylindrical pronotum. In typical examples the humeral angle is very 

 distinct, but it is very much rounded and nearly obsolete in the leu- 

 cochroic ones, both of which are from Mexico. The types of the 

 bug are from California. 



10. Notonecta montezuma Kirkaldy. 

 Notonecta montezuma . 



1897. Kirk., Tr. Ent. Soc. Lond., p. 402. 



1901. Champ. Bio. C.-A., p. 396, tab. 22, figs. 8, 8n $ , <) 9. 



1904. Kirk., Wien. Ent. Zeit., pp. 94 and 132. 



D scription. — Head narrow at base, similar to that of N. mexicana, notoce- 

 phalic lateral margins fairly straight, diverging from the base, vertex two and a half 

 to three times as wide as synthlipsis. Hemielytra orange-red, suffused (especially 

 marginally) with crimson, and sparingly and irregularly marked with black ; mem- 

 brane bluish-black, apex brownish-black, lobes subequal. Pedes : coxse brownish- 

 black, intermediate tibial spur, small, rather blunt. Abdominis dorsum : segment 1 

 black, 2 sordid testaceous, suffused with crimson and margined with black. Venter 

 black." (Kirk., Rev., pp. 402-3.) 



Long., 13. 1 to 14 mm., lat., 4.7 to 5 mm. 



Distribution. — ■ Havilah, California. (Am. Mus. N. If. coll.) 



It is interesting to record this bug from the United States, and the 

 American Museum of Natural History is to be congratulated in the 

 possession of this unique specimen among the other rare things in the 

 Henry Edwards Collection. The type is a specimen from Mexico in 

 the Hope Museum, Oxford. There is another specimen in the Paris 

 Museum. I am aware of no other records. This addition to our 

 fauna makes this article practical for the separation of all the known 

 American species of the genus Notonecta , except the South American 

 jV. bifasciata Guerin and N. nigra, described by Fieber from Brazil, 

 the latter being represented by only three specimens in collections. 



11. Notonecta insulata Kirby. 

 Notonecta insulata. 



1S37. W. Kirby, in Richardson's faun. Bor. Am., Ins., p. 285. (Reprint 

 1S78, Can. Ent., vol. X, p. 216).* 



1851. Fid)., Rhychotographieen, Abh. kongl. bdhm. Ges. Wiss. (5), VII, 



p. 475- 



1875. Uhl., Kept. U. S. C, ,\; <;. Surv., vol. V, p. S41. 



1876. Glover, Ms. Notes, p. 54 and pi. Y, fig. 4. 



1877. Uhl., Bull. V. S. (i. & <;. Surv., vol. Ill, no 2, p. 453. 

 1S7S. Uhl., Bull. U. S. G. & G. Surv.. vol. IV, p. 509. 

 1S78. Uhl., I'roc. Host. Soc. N. II., vol. XIX, p. 442. 



1886. Uhl., Ch. List, p. 28. 



1894. Van Duzee, Bull. Buff. Soc. Nat. Sci., vol. V, no. IV, p. 186. 



