418 Mr. G. W. Kirkaldy on the 
Pronotum much as in N. triguttata. IZemiclytra dark crimson-lake, 
irregularly marked with black; as a rule, the membrane is entirely 
black; in some specimens there are scarcely any spots on the 
clavus and corium, in others a broad undulatory band runs across 
the corium ; exocorium either entirely concolorous with the ground 
colour of the hemielytra, or blotched with black. Alar basal 
nervures crimson, the rest brown. Pedes: intermediate tibial 
spur verysmall. Abdominis dorsum black. Abdomiénis venter black, 
except the sordid testaceous (? green) connexivum. 
Long. 16—16°7 mm., lat. 6 mm. 
Type: Montandon colln. 
Hab. Cina: Kiang-Si (Paris Mus.), Ngan-Hoei (.Mon- 
tandon and my collns.), Mou Piu, Tibet (Paris Mus.). 
Var. noy., violacea. 
Shghtly more robust than the type, notocephalon a little 
shorter, hemielytra immaculate violet, except the slightly infuscate 
exterior membrane lobe. 
Long. 17:2 mm., lat. 7°5 mm. 
Type. Montandon colln. 
Hab. Burma: ‘‘Catcin Cauri”’ (Fea Ag. Nov. 1886, Mon- 
tandon and my collns., Hamburg Mus.). In its entirety, 
therefore, V. montandoni varies in length from 16 to 17:2 
mm., and in breadth from 6 to 7°5 mm.; its distribution 
embraces the major portion of the Chinese Hmpire (in- 
cluding Tibet) and Burma. 
15. Notonecta irrorata, Uhl. 
Notonecta irrorata, Uhl., 1878, Pr. Bost. N. H. Soc., 
x1x., p. 443 ; 1886, Checkl., p. 28. 
N. ornata, Fitch MS. (Sign. coll.). 
Head small, notocephalic lateral margins diverging widely, vertex 
a little more than three times as wide as synthlipsis; width of ver- 
tex and of the eye subequal; eyes rather larger proportionately than 
in N, triguttata, ete. Pronotum much wider basally than apically, 
lateral margins not sinuate, humeral angles acute, humeral and 
posterior margins sinuate. Heméelytra rich black, irrorated (espe- 
cially on the clavus) with refulgent yellow-brown, interior lobe of 
membrane and apex of exterior lobe smoky. The irrorations vary 
greatly in different individuals; in some the corium and membrane 
are almost immaculate, in others the whole of the clavus and 
corium is irrorated, imparting a chequered appearance, while in 
others the clavus is rich (almost metallic): yellow-brown with 
