138 FLemiptera-Heteroptera. 
is dilated, wide, and foliaceous; legs small and thin; 
beneath, all the segments of the thorax have a narrow 
central channel, the abdominal segments all more or less 
shortened and emarginate in the middle of the posterior 
margin; the fifth strongly emarginate, raised in the centre, 
sixth with its centre apparently hidden under the fifth in 
the ?; three genital segments visible in the 2, one in 
the g. 
There are a great number of European species in this 
genus. Puton gives as many as fifty-four as palearctic in 
his Catalogue, but we have only four recorded from this 
country. 
(6) 1. Not entirely black. 
(3) 2. Second joint of the antennsw longer than the 
third and fourth together —. : CORTICALIS. 
(2) 8. Second joint of the antenne not nearly so 
long as the third and fourth together. 
(5) 4. Lateral margins of the pronotum broadly 
white in front. : : : . ; . DEPRESSUS. 
(4) 5. Lateral margins of the pronotum dark 
throughout : . : : ; F . Lawsont. 
(1) 6. Entirely black . : : : ; ; . ATTERIMUS. 
A. corticalis, Zinn.—Brown, finely and granulately 
rugose; central lobe of the face very long; antenniferous 
tubercles long and acute ; antenne with the second joint 
longer than the third and fourth together, third pale at 
the apex, fourth silver-haired at the apex; pronotum with 
the anterior angles not produced, lateral margins jagged, 
narrowly reflexed, and diverging rapidly in front, largely 
rounded, reflexed, and dilated posteriorly, base deeply 
sinuate across the scutellum, dise with four longitudinal 
ridges and a longitudinal tubercle near each posterior 
angle ; scutcllum with its margins raised; elytra pale and 
dilated at the base, then narrowed, so as to show the apex 
of the first abdominal segment, their nerves strongly raised ; 
the posterior margin of the corium with a rectangular 
notch just below the scutellum; membrane smoky brown; 
