284 NORTHERN ZOOLOGY. 



(397) 2. * Corixa carinata. Ridged Corixa. 



C. (carinata) corpore subtus, capite, pedibusque, flavidis ; occipite posticc medio transverse, verticeqite longitudinaliter, obtusan- 

 yvlis ; prothorace carinato nigricanti, flavido transverse Uneato ; hcmelytris nigricantibus flavido irroratis. 



Ridged Corixa, with the body underneath, head, and legs pale-yellow; the hind-head posteriorly in the middle transversely, 

 and the vertex longitudinally, obtusangular ; prothorax ridged, brownish-black, transversely streaked with yellow- 

 ish ; elytra brownish-black sprinkled with yellowish. 



Length of the body 4 lines. 



Two specimens taken with the preceding species. 



DESCRIPTION. 



This species appears to come very near to Geoffroy's Corise, 7 which is evidently not C. striata ; 

 and also to C. stagnalis of Dr. Leach ; 8 but as neither of these authors mention the ridge of the 

 thorax, which is conspicuous, it appears to be distinct. Body yellow underneath, embrowned at the 

 insertion of the legs. Head yellow ; front broad and flat ; labrum transversely tricarinate ; occiput 

 obtusangular ; vertex with an obsolete longitudinal ridge issuing from the angle of the occiput : 

 prothorax with a longitudinal intermediate ridge, transversely streaked with yellow and brownish- 

 black : hemelytra sprinkled, and towards the base almost streaked, with black and yellow. In 

 other respects this species resembles C. striata. 



(898) 3. * Corixa planifrqns. Flat-fronted Corixa. 



C. fplanifronsj subtus nigra, utrinque flavido maculata ; occijiite medio obtusangulo ; fronte retusa ; prothorace carinato, nigri- 

 canti, flavido transverse lineatoi; liemcli/tris nigricantibus flavido irroratis. 



Flat-fronted Corixa, underneath black, with the sides spotted with pale-yellow; occiput obtusangular in the middle; front 

 blunt ; prothorax carinated, brownish-black, transversely streaked with pale yellow ; hemelytra brownish-black 

 sprinkled with yellow. 



Length of the body 4 lines. 



Two specimens taken with the preceding. 



DESCRIPTION. 



This species differs from the preceding in having the under side of the body black, with two 

 pale spots on each side of the breast, and the anal half of the abdomen pale-yellow. The head is 

 yellow, the vertex is ridged longitudinally and separated from the front by a transverse curvilinear 

 ridge ; and from which the anterior part of the face is inflexed, plane or slightly concave ; in other 

 respects this species exhibits exactly the same characters with C. carinata. They may perhaps be 

 sexual varieties. 



' Lis. i, 478, 1, t. ix, / 7. s Linn. Trans, xii, 16. 



