THE INSECTS OF NEW JERSEY. 169 



A. stagnalis Leach, (limitata Fieb.) "Atlantic States" (Uhl). 



A. stigmatica Fieb. "United States" (Uhl). 



A. alternata Say. "United States" (Uhl). 



A. harrisii Uhl. Madison (Pr). 



A. zimmermannii Fieb. "United States" (Uhl). 



A. kennicottii Uhl. "United States" (Uhl). 



A. suffusa Uhl. New Jersey (Jn). 



A. serrulata Uhl. New Jersey (Jn). 



A. expleta Uhl. Lakewood VIII (Coll). 



CALLICORIXA White. 

 C. kollarii Fieb. Canada to Florida. 



Family NOTONECTID^. 



These are the "back-swimmers," so named because the upper surface is 

 keeled, and they swim back down. They are predatory, and "bite" 

 severely if carelessly handled. Mr. Davis lists five species from Staten 

 Island, and remarks that "they are most common in fall and spring, and 

 pass the winter like so many other water bugs as adults." Mr. Bueno 

 adds that "they can be caught, active, under the ice except in the coldest 

 days of winter." 



Sub-family NOTONECTIN^. 



NOTONECTA Linn. 



N. insulata Kirby. Ft. Lee Dist. V, VIII, 

 Staten Island VIII, IX, Delair (Bno) ; 

 DaCosta VII (Jn). 



N. irrorata Uhl. Piedmont Plain and 

 northward all season, and probably 

 throughout the State. Fig. 71. A water-boatman, 



,--, Notonecta species. 



N. undulata Say. Throughout the State, 



our most common species, ranging in color variation from almost 

 black to pure white. 



N. variabilis Fieb. Piedmont Plain and northward throughout the sea- 

 son. Riverton VII, 12, VIII, 17 (div), and probably throughout the 

 Delaware Valley region. "It is apt to be mistaken for a dwarf white 

 undulata, and is the species appearing in the previous edition as 

 americana." 



N. raleighi Bno. Delair (Bno). 



N. uhleri Kirk. Ft. Lee Dist. V, 5, 14 (Bno); Staten Island VIII (div). 

 The rarest of our species if not in the United States. 



