Dr. Leacn’s Classification of. the Notonectides. AS 
Notonecta maculata. Oliv. Encycl. Méthod. Hist. Nat. viii. 988. 4. 
Notonecta glauca var. A. Latr. Gen. Crust. et Ins. iii. 150. 
Habitat in Anglia prope Bristol, Plymouth, et Exeter. 
Elytra apice fuliginosa. 
Spec. 3. Notonecta glauca. 
N. elytris griseis margine fusco-puncfatis, dorso nigro apice pallido. 
Notonecta glauca auctorum. 
Var. 8. Elytris subferrugineis fusco-subirroratis. 
Var. y. Elytris apice subnebulosis. 
Var. à. Elytris pallidis immaculatis. 
Habitat in Britannia vulgatissime. 
"This species is by far the most common that occurs in Great 
Britain. ‘The back- T" the abdomen is always black, terminated 
with pale yellow. Var. 6 at first sight bears a-near resemblance 
to .N. maculata ; but the spots in the front of the elytra, and the 
colour of the back, will readily distinguish them. Var. y I twice 
received from Mr. S. W. Millard, who took them near Bristol. 
Var. à I found in the north of England, and I suspect it to be an 
immature specimen. All the varieties, excepting the last, have a 
small blackish spot on the hinder margin of the elytra; but it is 
much more distinct in some specimens than in others, and it is 
never to be seen in N: maculata: this affords another character 
for discrimination, and therefore ought not to remain unnoticed. 
 Gen.2. Pufa: 
The thorax is obscurely hexagonal, with the hinder margin pro- 
minent and rounded ; the head as broad as the broadest part of 
the thorax; the eyes are rather oblong, without the least ten- 
dency to converge behind ; the hinder pair of legs not more cili- 
ated than the others, but are terminated by very strong and di- 
stinct claws; tips of the elytra acuminated and entire. = 7 ^ — 
| Spec. 
