266 



[April, 



yellow linos scarcely reaching the inner margin, three or four of them at tho 

 base broader, oblique, and entire, the rest less regular, shorter, and interrupted, 

 Borae outwardly furcate. Corium with short, interrupted, transverse, yellow 

 lines, forming on tho inner margin a longitudinal row of small linear spots, 

 exterior to which is a narrow longitudinal black line, the posterior discoidal 

 markings finer and somewhat twisted ; marginal channel pale, infuscatcd on 

 the base and edge, posteriorly with faint transverse lines ; membrane suture 

 yellowish, narrow, ill defined. Membrane covered with hieroglyphic markings, 

 outer margin black. Sternum, scajoulcc, x>^eurce, and parapleuroe ochreous. 

 Legs pale yellow ; paZce, S > short, roundly cultrate j 2nd pair, apex of tihice 

 and tarsi, and the cilia of the posterior tarsi, black- 

 Abdomen fuscous-black, indistinctly ochreous in the middle. Length 2^ lines. 



Allied to O. limit ata, Fieb. 



A single taken in September, 1866, in a small stream running 

 into Loch Pad, Isle of Bute (Scott). 



CoEixA DUBIA, (Fieh.), n. sp. 

 Black with yellow niarkings. Pronotum, clavus, and corium finely 

 rastrate ; pronotum with a distinct short keel, and 6 — 7 alternate, 

 narrow, irregular, black and yellow lines ; clavus with straight lines 

 throughout ; coriim with interrupted unparallel lines ; marginal channel 

 pale, black at base. 



(J . Eead yellow, brownish on the posterior margin of the crown ; facial depression 

 flat, extending just beyond the angle of the eyes. 



Thorax — Pronotum in front with a fine, distinct, sharp keel, extending about one- 

 third of the length ; disc with 6 — 7 narrow, irregular, yellow lines, separated 

 by as many similar black ones, tho former being interrupted in places by the 

 confluence of the points of the latter, some of the black Hues being also 

 abruptly shortened. Elytra — Clavus with narrow, obhque, parallel, 'yellow 

 lines throughout, all more or less shortened inwardly, sometimes two or three 

 furcate outwardly ; corium with transverse, not parallel, subfurcate yellow 

 lines, twice interrupted — first near the inner margin, leaving there a longi- 

 tudinal row of short lines ; second, in a less degree and less regularly, just 

 within the outer margin ; marginal channel pale, black at the base, and some- 

 what infuscated posteriorly ; membrane-suture yellow, distinct ; membrane 

 covered with twisted, hieroglyphic characters, straight and parallel on tho 

 inner margin ; outer margin black. Stei-num black, sca^ulce, pleura;, and 

 parapleura; pale yellow, black inwardly. Legs yellow ; paZcc of tho <J rather 

 broad, roundly cultrate ; 2nd pair, tibia} and tarsi, at the apices black ; cilia 

 of the posterior tarsi brown. 



Abdomen black. Length 2i lines. 



Allied to C. livutafa, Fieb. A single ^ taken in September, 1866, 



in a small stream running into Loch Fad, Isle of Bute (Scott). 



