1052 FAMILY XXXIX. — NOTONECTID^E. 



1188 (1349). Notonecta irrorata Uhler, 1878, 443. 



Elongate, subcylindrical, convex. Head except eyes, pronotum and 

 legs, in great part, and pleura of prosternum, dull greenish-yellow; eyes, 

 scutellum and under surface black or dark brown ; elytra dark brown 

 mottled with dull brownish-yellow or velvety black mottled with brown; 

 membrane fuscous-brown. Head and pronotum with scattered rather 

 coarse shallow punctures, the latter twice as wide as long. Length, 12 — 

 15.5 mm. (Fig. 212). 



Frequent throughout Indiana, especially so in the lakes and 

 streams of the northern counties, April 11 — Sept. 16. Agri- 

 cultural College, Mississippi (Weed) . Its distribution is mainly 

 northern, extending from Quebec and New England west to 

 Montana and southwest to North Carolina, St. Augustine, Fla., 

 and Kansas. It varies much in the color of clavus and corium 

 and fresh specimens often have an evanescent bluish tinge. 

 Bueno (1905a, 146) states that both irrorata and uhleri appear 

 to like to hide among the roots of plants growing at the water's 

 edge, to which they cling. Hussey records irrorata as partial 

 to the sluggish plant-free streams and pools in shady situations 

 in Berrien Co., Mich., and says it was the only Notonecta taken 

 in the beach drift of Lake Michigan. Near Indianapolis, I 

 have found it most common among the water weeds along the 

 edges of spring-fed woodland ponds in company with Microvelia 

 americcma (Uhl.) 



1189 (1357). Notonecta insulata Kirby, 1837, 285. 



Elongate, subcuneiform. Head and front portion of pronotum green- 

 ish-yellow; hind part of pronotum hyaline, blackish; scutellum dark 

 velvety brown or black, its apical half rarely in part yellow; elytra dull 

 reddish-yellow, usually with a narrow interrupted submarginal stripe, an 

 oblique band near hind margin of corium and the tip of the latter black- 

 ish; membrane usually hyaline, blackish at base, paler toward apex; beak, 

 legs and sides of prosternum dull yellow; under surface brownish-black, 

 the connexivum beneath and the ventral carina greenish. Pronotum 

 twice as wide as long, its side margins sinuate near base. Visible portion 

 of scutellum about one-fifth wider at base than long. Length, 12.5 — 

 15.5 mm. 



Staten Island, N. Y., April — September {Davis). Guelph, 

 Ontario, early April; Amherst, Mass., May 19 {Brimley). Win- 

 nipeg, Manitoba, July — September (Gerhard). A species of 

 northern distribution in the east, more southerly in the west, 

 ranging from Quebec and New England west to the Pacific ; not 

 recorded south of Maryland in the east, but in the west known 

 from New Mexico, Arizona and Southern California. Bueno 



