266 
[Aprir! 
yellow lines scarcely reaching the inner margin, three or fonr of them at the' 
base broader, oblique, and entire, the rest less regular, shorter, and interrupted.! 
some outwardly furcate. Corium with short, interrupted, transverse, yellowv 
lines, forming on the 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, infuscated onr 
the base and edge, posteriorly with faint transverse lines; membrane suture y 
yellowish, narrow, ill defined. Membrane covered with hieroglyphic markings,,; 
outer margin black. Sternum, scajoulce, pleurce, and parwpleurce ochreous.L 
Legs pale yellow ; palce, S , short, roundly cultrate ; 2nd pair, apex of iiUm- 
and tarsi, and the cilia of the posterior tarsi, black. 
Ahdomen fuscous-black, indistinctly ochreous in the middle. Length 2i Hues. ' 
Allied to G. limit ata, Yxob. ' 
A single c? taken in September, 186G, in a small stream running ' 
into Loch Fad, Isle of Bute (Scott). 
CoEixA DUBIA, (Fieb.), n. sp. ^ 
Black with yellow markings. Fronotum, clavus, and corium finely 
rastrate; pronofum witli a distinct short keel, and 6—7 alternate, 
narrow, irregular, black and yellow lines ; clavus with straight lineg 
throughout ; corium with interrupted unparaUel lines ; marginal channel 
pale, black at base. 
3 . Head 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 hnes, separated 
by as many similar black ones, the former being interrupted in places by the 
confluence of the points of the latter, some of the black Unes being also 
abruptly shortened. Elytra-Clavus with narrow, oblique, 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 the 
inner margin; outer margin black. Sternmn black, scapulm, pleurce, and ' 
parapleural pale yellow, black inwardly. Legs yellow ; palce of tho <? rather 
broad, roundly cultrate; 2nd pair, tibim and tarsi, at the apices black; cilia 
of the posterior tarsi brown. 
4Momm black. Length 2i lines. 
Allied to C. limitata, Eieb. A single ^ taken in September, 1866, 
in a small stream running into Loch Pad, Isle of Bute {Scott). 
