410 Mr. G. W. Kirkaldy on the 
8. Notonecta undulata, Say. 
Notonecta undulata, Say, ? 1832, Descr., Het. Hem. N.- 
Am. p. so; Complete Writ. 186945) sp. 500; 
Uhil., 1875, Bull. U.S. Geol. Surv. (2) v., p. 239, 
pl. 21, fig. 33; 1886, Checkl., p. 28; Comst., 
1888, Introd. Ent.,i., p. 186, fig. 157; Weed, 
1889, Bull. Ohio Agr. Sta., Techn. ser., i., p. 12, 
plea tie. 3. 
N. americana, Gmel., 1789, in Linn. Syst. Nat., ed. xii., 
p. 2118; Herr.-Schail, 1853.5 Wanz. Ins ix. 
p. 44, pl. 294, fig. 902 (nec Fabr.), syn. nov. 
N. punctata, Fieb., 1851, Abh. béhm. Ges. Wiss. (5) 
vil., p. 476; Uhl., 1886, Checkl., p. 28, syn. nov. 
N. variabilis, Fieb., 1851, l.c., 477 (in part); Guér., 
1856, in Ramon de la Sagra’s Cuba, Hist. Nat., 
Wiley Ds Leo. 
N. virescens, Blanch., 1852, in Gay’s Chile, Zool., vit, 
p- 233; Atlas Zool. Ins. hémipt., pl.1., fig. 16, 
syn. Nov. 
N. pallipes, Leth., 1881, Ann. Soc. Ent. Belge, xxv., 
p- 13 (nec Fabr.). 
Head diverging curvedly (varying in degree) from the 
synthlipsis, which is not quite two and a-half times less wide than 
the vertex. Pronotum very similar to that of N. glauca, L., but. 
the humeral margins asa rule not distinct. Scutellum not quite 
one-fourth shorter than the metanotum, varying in colour from 
pale luteous to black, with divers intermediate arrangements of 
the two colours ; similar hemielytral markings occurring with dis- 
similarly coloured scutella and vice-versa. J/etanotum varying from 
luteous to black, with three or more dark castaneous stripes, scutellar 
margin luteous. Heméelytra exceedingly variable, giving rise to 
a number of well-marked varieties, though these are linked together 
by intermediate forms. 
Var. 1, maculata, Fieb. Pure moonlight colour (or occasion- 
ally very pale greenish-yellow), either immaculate or with a rich 
sienna-brown spot at the base of the membrane. Scutellum, meta- 
notum, and abdominal segments pure golden-yellow. 
This is also (according to the specimens labelled in 
his handwriting, from Lethierry’s collection now in the 
collection of M. Maurice Noualhier and Prof. Montandon) 
N. pallipes, Leth. 
