CORIXID^l. 607 



linear yellow space between them, into which the ends of some of the 

 black transverse markings project ; near the inner margin a less dis- 

 tinct, longitudinal black streak ; anterior marginal channel livid, 

 brown on the inner edge, posteriorly with a small blackish streak ; 

 claval suture dark ; line of the membrane-suture narrowly yellow, 

 followed by a dark line ; Membrane with fine, short markings, 

 twisted on the disk, parallel on the inner margin ; anterior and pos- 

 terior margins narrowly blackish. Sternum dull yellow ; Prosternum; 

 lobes broad, oblique and narrowed posteriorly, slightly twisted. 

 Legs ; 1st pair, palce in the $ broad cultrate, convex above ; in 

 the <j> similar but narrower ; 2nd pair, tibiae and tarsi light brown 

 at the apex ; 3rd pair, tibia narrowly brown on the upper edge ; 

 tarsi, cilia black. 



Abdomen above, black, the sides pale ; beneath, pale yellow, in the 

 $ the first 3 segments sometimes livid in the middle. 



Length, 3^ 3| lines. 



Common in stagnant and running water in spring and au- 

 tumn. 



Species 14. CORIXA FALL^NI. 



CORISA FALLENII, Fieb. Syn. Coris. No. 18 (1848) ; Spec. Coris. 31, 34, 

 t. 2, fig. 12, palse (1851). 



FALLENI, Walleng. Oefv. xi, 147, 12 (1855) ; Fieb. Europ. Hem. 



97,28(1861). 



(COKISA) EALLENII, Flor, Rhyn. Liv. i, 789, 3 (1860). 



Above fuscous-black, with transverse yellow markings, slightly 

 shining. Pronotum with 8 9, mostly entire, yellow lines. 

 Mytra with somewhat close, yellow lines, straight but unequal 

 at the base of the clavus, the rest undulating. Lobes of 

 the prosternum narrow, twisted. Palce of the <$ very broad, 

 subtriangular* 



Head brown-yellow ; Face in the $ paler, flat, scarcely depressed* 

 as far upwards as the lower angles of the eyes. 



Thorax. Pronotum somewhat prolonged, with 8 9 mostly entire 

 lines, the black intervals of about the same width, the middle one 

 short. Elytra with transverse black and yellow lines ; on the basal 

 rd or \ of the Clavus straight, entire, the yellow ones somewhat 



