156 [Temiptera-Heteroptera. 
coloured more like Cost. Dorsal and submarginal lines of 
the pronotum pale throughout; elytra, when present, of a 
rufescent brown; connexivum rather more narrowly pale; 
femora shorter than in thoracica, the basal joint of the pos- 
terior tarsi not nearly twice as long as the second; abdomen 
beneath with a fine central channel, and also with the 
silvery pubescence on each side arranged somewhat in 
longitudinal lines ; sixth ventral segment in the ¢ simply 
emarginate. 
L. 10-11 mm. 
Rare, and apparently a northern species; Loch Galby, 
Power ; Pitlochry, Norman ; Forres, Reuter. 
G. gibbifera, Schwm.—Black, in shape much like G. 
Oostx, having the mesopleurz very wide across the region 
of the intermediate cox; pronotum with a small yellow 
streak indicating the anterior extremity of the dorsal line, 
and a submarginal yellow streak on the posterior lobe only ; 
connexivum broadly yellow; legs brownish yellow, paler 
beneath; anterior femora black above, underside clothed 
with silvery hairs, a spot on each of the sheaths of the 
cox, and a central line extending from the metasternum 
to the apex of the body yellow ; metasternum with a yellow 
tubercle in the centre ; central line of the abdomen cari- 
nated; first joint of the posterior tarsi very long, twice as 
long as the second. 
L. 12 mm. 
Common, and generally distributed in the South of 
England, but not recorded, so far as I know, from Scotland 
or Ireland. 
G. lacustris, Linn.—Black, narrower than the pre- 
ceding. Pronotum with the submarginal yellow band con- 
tinued on to the anterior lobe; central carina strong, 
especially posteriorly ; legs pale, the anterior femora with 
two black lines; connexivum pale; abdomen beneath 
silvery, its centre more or less widely pale in the 2; pos- 
terior tibia and tarsi together almost as long as the femora ; 
