1869.] 



265 



Aquatilia. 



Section 5. — Coeixina. 



Family 1. — Cortxid^. 

 Oenus 1. — CoRiXA, Geoff. 



CORIXA VENUSTA, n. Sp. 



Broad, oval, dark browu with ochreous markings, delicately ras- 

 trate ; pronotim with 6 — 7 straight yellow lines, corium with very fine 

 transverse yellow lines interrupted by black longitudinal streaks, of 

 which one across the posterior inner angle and one at the angle are the 

 most conspicuous. 



Head oclireous ; crown brownish ; facial depression in tho S oval, deep, extending 

 the whole length of the face, far up between the eyes. 



Thorax — Pronotum with 6 — 7 straight, entire yellow lines, the dark intervals 

 scarcely reachiHg the sides ; disc in front with a very small carinate elevation. 

 Elytra — Clavus with narrow, oblique, parallel yellow lines, those in the middle a 

 little shortened inwardly. Corium with very fine, somewhat contorted, trans- 

 verse yellow hnes, and broad, dark intervals, traversed longitudinally by a long, 

 broad black vitta across the posterior inner angle, a short line at the angle, a 

 narrow long line just within the anterior margin, all black, and an indistinct 

 dark interruption down the centre of the disc ; marginal channel pale Uvid 

 yellowish, somewhat infuscated outwardly and at the base, apex yellow- 

 Membrane with small, hieroglyphic, ochreous and black markings, on the inner 

 margin straight and parallel lines ; the disc traversed longitudinally by two 

 more or less distinct black lines. Sternum ochreous, fuscous in the middle, 

 scapulw, pleurce, and parapleurce, pale yellow. Legs brownish-yellow ; jpalce of 

 the <J short, broad, roundly cultrate ; 2nd pair, tihicB and tarsi black afe the 

 apex, 3rd pair, cilia of tarsi brown-black. 



Abdomen ochreous, fuscous at the base. Length 2j — 2? lines. 



Allied to C. semistriata, Fieb. 



Of this pretty and well-marked species, two examples were taken 

 in small streams near Eothsay, Isle of Bute, in September, 1866 

 iJDoiLg. ^ Scott) ; aDd one was captured near Carlisle, in 1868 

 Sunter). 



COEIXA DECOEA, n. Sp. 



Narrow, parallel- sided, brown-black, rastration pronotum, clavus, 

 and corium \erj fine. JPronotum with seven fine undulating lines ; 

 Clavus and corium with fine, broken, yellow lines ; marginal channel 

 pale, infuscated at the base. 



<? . Head fuscous-brown, facial depression slight, flat, with a fine ridge in front. 



Thorax — Pronotum short, rounded behind, in front with a very small elevation^ 

 disc with seven transverse, narrow, entne, yellow lines, the front ones undu- 

 lating, the black intervals of about equal width. Elytra — Clavics with narrow 



