Dr. LzAcn's Classification of the Notonectides. 15 
Notonecta minutissima. Linn. Fn. Sv. 244. 905. 
— — Syst. Nat. i. 713. 3. 
Habitat in rivis, lacubus vulgatissime. 
Long. Corp. 1 lin. 
Linné has described this species so minutely as to leave no doubt 
with respec: to the above reference; in the twelfth edition of his 
Systema Nature, and in the last edition of his Fauna Suecica, he 
has given the following characters: ** N. elytris cinereis; maculis 
fuscis longitudinalibus. Magnitudo minime arenule ; depressa est. 
Pedes posteriores longiores ; primum par minimum. Habet alas, ely- 
tra, scutellum”? 
Sigara minutissima is | found in every part of Gross Britain; I 
have observed it in the Lake of Killarney, and in other lakes in 
the south of Ireland ; in the north of England, near Carlisle, and 
in Derwentwater ; in Loch Lomond and Loch Katerine in Scot- 
land ; in the river Tavy in Devon; and I have frequently received 
it from the Norfolk collectors: whence we may infer that it occurs 
in that country. 
To this genus probabl y belongs the Sigara coleoptrata of Panzer, 
Faun. Ins. Germ. In. 50. 24. 
Gen. 4. Cortxa. 
The thorax is more or less produced behind in all the species 
of this genus; but it is not evident in the first division of the ge- 
nus until the elytra have been elevated. "The front, the under 
parts of the body, and the legs, in all the British species, are yel- 
lowish. | supe Swick 
* Elytris ad apicem subgradatim acuminatis. 
"Ihe channel on the anterior margin of the elytra in this divi- 
sion is uninterrupted, and gradually disappears before it reaches 
to the — S of the elytra. 
Spec. 
