Revision of the Notonectidx. 419 
faint, distant, narrow black lines. Alar nervures brown. Pedes : 
intermediate tibial spur small. Adbdominis dorsum: first to fifth 
segments black, sixth, seventh, and eighth sordid greyish-brown. 
Abdominis venter black. 
Long. 15-14 mm., lat. 4-45 mm. 
Hab. N. America. 
Widely distributed throughout the United States of 
America, but local. Prof. Uhler writes me with regard 
to their occurrence in the environs of Baltimore, “ Quite 
local and lives in shaded ponds of cool water. In this 
case the water came from springs that empty into old 
quarries of Phyllite slate, into which the roots of willows 
grow in thick mats and stain the water somewhat 
brown.” 
16. Notonecta glauca, L. 
[Var.1] Notonecta glauca, Linn., 1758, Syst. Nat., 
ed. x., p. 439; Fabr., 1794, Ent. Syst., iv., 
p-. 97 (type of genus); Dougl. & Scott, 1865, 
Brit. Hem:,, 1, p. 087, pla, fig. 4. 
Nepa Notonecta, de Geer, 1775, Mém., iii., 
p: 382, pl. xvi, figs. 16-28. 
Notonecta octopunctata, Gmel., 1789, in Linn. 
Syst. Nat., ed. xiii., p. 2119, syn. nov. 
N. Fabriew, var. glauca, Fieb., 1851, Abh. 
bohm. Ges. Wiss. (5), vil., p. 473. 
N. Fabrici, var. glauca, Fieb., 1861, Europ. 
Hem., p. 101. 
N. glauea, var. fulva, Maria, 1897, An. Soc. 
Hspan., p. 1380. 
N. secunda, Schiiff. [1766], Icon. Ins. Ratisb., 
1, pt. 1, pl. 97, ne. Le each. syn. 
[Var. 2] N. marmorea, Fabr., 1803, Syst. Rhyng., 
LOS. 
ra tind, Schiff, [1766], U. c., pl. 33, figs. 5 
& 6. Hazel. syn. 
[Var. 3] N. glauca, var. nov. canariensis. 
[Var.4] N. marginata, Miill., 1776, Zool. Dan., p. 104. 
IN, obliqgua, “Thunb; 1737, DD. Ac. Mus. 
Upsal., p. 61, syn. nov. 
N. furcata, Fabr., 1794, Kut, Syst., iv., p. 58 ; 
Coqueb., 1799, Illustr. Icon., 1., p. 38, pl. 19, 
fig. 2; Haworth, 1812, Trans. Ent. Soc. 
Bonds, 15.98: 
