Spec. I. Corixa coleoptrata.
C. thorace rufo-griseo, elytris sublutescentibus: maculis longitudinalibus nigricantibus.
Sigara coleoptrata, elytris totis coriaceis fuscis; margine exteriori flavo.Fabr. Syst. Rhyng. 105. 4.
Habitat in Norfolciæ aquis prope Norwich.
Although the character by Fabricius does not accord with that given above, yet as he drew his description from a museum specimen (which generally assumes the colour he mentions) I give his synonym without any hesitation; but this insect is distinct from the Sigara coleoptrata of Panzer, which is figured with a scutellum, and most probably belongs to the genus Sigara as mentioned above.
** Elytris ad apicem subrotundatis.
The channel in the fore part of the elytra, at about two-thirds from its commencement, is interrupted by an oblique transverse elevated line, and it terminates abruptly before it reaches to the apex of the elytron, and then it leaves the margin, inclining a little inwards or backwards.
a. Elytris thoraceque rugulosis.
Spec. 2. Corixa striata.
C. thorace elytrisque fuscis: lineolis flavicantibus transversis striatis, dorso nigro, lateribus flavidis.
Notonecta striata.Linn. Fn. Sv. 244. 904.Syst. Nat. i. 712. 2.
Habitat in aquis stagnantibus.
Descr. Elytra striis undulatis flavicantibus, margine exteriore fusco. Thorax perfuscus lineolis transversis numerosissimis flavicantibus.
Spec. 3. Corixa stagnalis.
C. fusca, thorace lineolis transversis numerosissimis flavicantibus, elytris fuscis flavido irroratis.
