16 Dr. LraAcnu's Classification of the Notonectides. 
Spec. 1. Coriva coleoptrata. | 
C. thorace rufo-griseo, elytris sublutescentibus: maculis longitu- 
dinalibus nigricantibus. 
Sigara coleoptrata, elytris totis coriaceis fuscis; margine exte- 
riori 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 speci- 
men (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 due to the genus Sigara as mentioned 
above. 
The To in the fore part o of f the qb at t 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 el ytrisque fuscis: lineolis flavicantibus transversis stria- 
tis, 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 fla- 
vicantibus, : 
Spec. 3. Corixa stagnalis. 
C. fusca, thorace lineolis transversis numerosissimis flavicantibus, 
elytris fuscis flavido irroratis. 
Habitat 
