Page:Transactions of the Linnean Society of London, Volume 12.djvu/30

14

P. grisea, fronte lineâ fuscâ, thorace elytrisque subtilissime punctatis.

Notonecta cinerea, anelytra. ''Geoffroy Ins. Par.'' i. 477. 2.

Notonecta minutissima.

''Fourc. Entom. Paris,'' i. 220. 2.

''Latr. Gen. Crust. et Ins.'' iii. 150.

''Oliv. Encycl. Méth d.'' viii. 389.

''Fabr. Ent. Syst.'' iv. 59.

'' Syst. Rhyng.'' 104. 10.

Long. Corp. 1 lin.

Habitat in aquis stagnantibus prope Londinum vulgatissime.

This species has been considered by Geoffroy, Fabricius, and Olivier, as Notonecta minutissima of Linné, which reference undoubtedly belongs to the following species; viz. to Sigara minutissima.

Whether Notonecta minutissima of Panzer {''Fn. Ins. Germ. In.'' ii. 14.) be intended for this species, I cannot take upon myself to decide, as his figure indicates a deep notch in the hinder margin of the thorax, which I have not been enabled to detect in any specimens; his figure must therefore be incorrect, or be intended for a distinct species from the one in question.

Geoffroy has described the larva, never having seen the perfect insect.

The characters already given sufficiently distinguish this from the two preceding genera.

S. supra cinerea, elytris fusco obsolete maculatis, subtus pedibusque flavis.

Rh