186D.] 265 
Aquatilia. 
Section 5. — Coeixina. 
Family 1. — Cobixid^. 
Oemis 1. — CoBixA, Geoff. 
COEIXA YENTJSTA, n. Sp. 
Broad, oval, dark brown with oclireous markings, delicately ras- 
trate ; pronotum 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. 
jffead ochreons ; crown brownisli ; facial depression in the <? oval, deep, extending 
the whole length of the face, far up between the eyes. 
T/ioraic— Pronotuw with 6—7 straight, entire yellow lines, the dark intervals 
scarcely reaching the sides ; disc in front with a very small carinate elevation. 
Elytra— Clavus with narrow, obhque, parallel yellow lines, those in the middle a 
little shortened inwardly. Cwium with very fine, somewhat contorted, trans- 
verse yellow lines, 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 livid 
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, 
.'Mpu.!^, pleurce, and parapleurcB, pale yellow. Legs browuish-yellow ; pala of 
the <J short, broad, roundly cultrate ; 2nd pair, tihice and tarsi black afe the 
apex, 3rd pair, cilia of tarsi brown-black. 
Abdomen ochreous, fuscous at the base. Length 2^— 2i lines. 
Allied to 0. semistriata, Pieb. 
Of this pretty and well-marked species, two examples were taken 
in small streams near Eothsay, Isle of Bute, in September, 18GG 
(^Douo 4 iScott) ; and one was captured near ^Carlisle, in 1868 (X 
Tf'unter). 
COEIXA DECOEA, U. sp. 
Narrow, parallel-sided, brown-black, rastration ofjpronoium, clavus, 
and coriu7?i very fine. Pronotum with seven fine undulating lines; 
Clavus and corium with fine, broken, yellow lines ; marginal channel 
pale, infuscated at the base. 
S . Head fuscous-brown, facial depression slight, flat, with a fine ridge in front. 
Thorax— Pronotum short, rounded behind, in front with a very small elevaticu. 
disc with seven transverse, narrow, entire, yellow lines, the front ones undu- 
lating, the black intervals of about equal width. Elytra— Clavus with narro^v 
