Revision of the Notonectide. 4.05 
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 : 
coxe brownish-black, intermediate tibial spur small, rather blunt. 
Abdominis dorsum: segment 1 black, 2 sordid testaceous, suffused 
with crimson and margined with black.  Ventex black. 
Long. 15°5-14 mm., lat. 4°7-5 mm. 
Hah. Amurica, W. Mexico, ¢, 2. (Hope Mus. 
Oxford.) 
“Nord de Inde” [? error] (Paris Mus.). 
Dyer. ¢. Hope Must 
Very similar to, and perhaps an aberration from, 
N. insulata, but differing by the structure of the head. 
Not unlike N. mevicana, but larger, more elongate, and 
differing by the pronotal structure. 
3. Notonecta insulata, W. Kirb. 
Notonecta insulata, W. Kirb., 1837, in Richardson’s 
Faun. Bor. Amer. Ins., p. 235 [reprint 1878, 
Canad. Ent.; =, ps Joleen W836, Checkl., 
8. 
N. wmpressa, Fieb., 1851, Abh. bohm. Ges. Wiss. 
(5) vi, p. 475; UWhiy. 1886, Checkl., p. 28. 
Syn. nov. 
WN. rugosa, Wieb., 1851, l. ¢., p. 476. 
2? N. fabricu, Towns., 1891, Pr. Ent. Soc, Wash., ii., 
p- 56 (nec Fieb.). 
Head : notocephalic lateral margins fairly straight and nearly 
parallel, very slightly constricted near the base; vertex little 
wider than synthlipsis, which is about one-fourth less than the 
width of the base of the eye. Lateral and humeral margins of 
the pronotum sinuate. Scutellum varying slightly in length, but 
occasionally reaching and usually nearly reaching the base of the 
metanotum, black [Fieber, in N. rugosa, records two varieties 
(cordigera and basalis) with yellowish scutellum, but I have not 
seen them]. //em/éelytra variable in pattern and colour, the prin- 
cipal variations being :— 
1. Fusco-flavous (or sordid testaceous), with a faint blackish 
spot or streak here and there ; indistinguishable from some forms 
of the hemielytra in .V. glauca [? N. fabricii, Towns.]. 
2. Rufofuscous ; the base of the membrane, an irregular blotch 
