Dr. LzAcn's Classification of the Notonectides. 17 
Habitat in aquis stagnantibus putridis vulgatissime. 
Elytra fusca flavido-irrorata; margine anteriore flavido ; mar- 
gine postico basin versus flavido-lineato. Dorsum fusco-nigricans. 
This species is about half the size of C. striata. 
Spec. 4. Corixa fossarum. 
C. fusca, thorace lineolis sex transversis flavidis, elytris fuscis 
flavido-irroratis. 
Habitat in fossis passim. 
C. stagnali paulo minor. Elytra fusca flavido-irrorata, antice fla- 
vida, postice basin versus flavido-lineata. Dorsum flavum. 
| Spec. 5. Corixa lateralis. 
C. albida, thorace lineolis septem nigris, elytris nigro-irroratis : 
margine antico immaculato. 
Habitat in fluviis. 
C. fossarum paululum minor. Dorsum atrum, lateribus flavis. 
Spec. 6. Corixa dorsalis. 
C. flavida, thorace margine lineolisque sex transversis nigris, 
elytris nigro-irroratis: margine antico immaculato. 
Habitat in fluviis vulgatissime. 
C. stagnali paulo major. Dorsum flavum. 
b. Elytris thoraceque glaberrimis, levibus. 
Spec. 7. Corixa Geoffroyi. 
C. flavida, thorace lineolis transversis numerosissimis nigris, ely- 
tris nigro-irroratis: dorso pernigro apice flavido. 
La Corise. Geoff. Hist. Nat. des Insect. i. p. 48. pl. 9. fig. T. 
Sigara striata. Panz. Fn. Ins. Germ. In. 50. 23. | 
VOL. XII. D | Long. 
