140 Mr. E. Saunders’ Synopsis of 
I. Apical joint of antenne shorter than 2nd. 
J. Entire insect covered with projecting hairs.. Pionosomuas. 
JJ. Not covered with projecting hairs. 
K. Thorax in front very shining and polished ... Lamproplaw. 
KK. Thorax in front not shining and polished .. Drymus. 
II. Apical joint of antenne as long or longer 
than 2nd .. ee a .. Rhyparochromus. 
HH. Thorax not constricted s catatanty: 
a. Species not flattened or shining .. -» Peritrechus. 
b. Species flattened, smooth and shining .. Plinthisus. 
FF. Lateral carine not visible from above. 
G. Anterior margin of thorax raised .. .. Lasiosomus. 
GG. Anterior margin of thorax not raised. 
H. Surface not pubescent .. oe oe «+ Acompus. 
HH. Surface pubescent oe oe ac .. Stygnocoris. 
CC. Membrane with basal cells .. or -» Phygadicus. 
II. Basal joint of hind tarsi shorter than 2nd and 3rd 
together. 
A. Sides of thorax not thin and knife-like. 
B. Base of thorax emarginate .. oe «+ Ischnodemus. 
BB. Base of thorax not emarginate. 
C. Head without processes between the antennz 
andeyes .«- are be . Ischnorhynchus. 
CC. Head with processes between the antenne anid 
eyes .. .e +e «» Cymus. 
AA, Sides of thorax with a Lae: like edge ss Chitacrs: 
GASTRODES. 
T. Lateral margin pale and knife-like only posteriorly.. ferrugineus. 
II. Lateral margin pale and knife-like npoueno its 
length .. ee an -- abietis. 
1. ferrugineus, Linn. Fig. Donat: & Scott, Brit. Hem. 
pl. vi. fig. 4. 
Much depressed and dilated; dull brownish-red, head 
and front of thorax black, the latter lar gely and irregularly 
punctured, much wider behind than in front. Elytra 
widest about the middle, punctured in irregular lines. 
Legs red. Anterior thighs darker, thickened and den- 
ticulate on their front margin, w ith one larger spine in 
the middle. Antennz red-brown; 2nd joint rather paler 
than the rest. 
Length 3} lines. 
Not uncommon on fir trees. 
2. abietis, Linn. Fig. Panz. Faun. Germ. 92, 22. 
Very like the preceding, but differs in being paler and 
rather narrower ;* the front part of the thorax is highly 
