British Hemiptera-Heteroptera. 301 
cuneus pale. Thighs black; tibie pale, with their ex- 
treme apex and sometimes the base more or less brown. 
Antenne: first and second joints black, first short and 
thick, second long, much thickened and densely hairy, 
third and fourth filiform, together slightly longer than 
the second, pale, especially the base of the third. 
Length 13—13 line. 
Occasional by beating, &c. 
PSALLUS. 
I. First and second joints of antenne black, or partly so. 
a. g Antenne entirely dark; 9 second 
joint dark at the base and apex 
b. ¢ Third and fourth joints of antenna 
pale; 2 second joint pale, apex black ambiguus. 
II. Antenne entirely pale. 
A. Posterior thighs not spotted. 
A*, Cuneus entirely dark 3 sie +» obscurellus. 
A*A*, Cuneus pale at the base. 
B. Species brown or red. 
C. Thighs dark brown or black sie «+ variabilis. 
CC. Thighs bright red. 
a. Smaller and broader, reddish; thighs 
betuleti. 
short; pubescence golden .. -. simillimus. 
b. Larger and narrower, brown; thighs 
long; pubescence white .. oe quercus. 
BB. Species entirely pale flavous ae .. Hieber. 
AA. Posterior thighs spotted, sometimes entirely 
dark, but eyen then darker spots are 
visible. 
B. Densely covered with long, thick, silvery- 
white deciduous hairs... e -. Ltotermundi. 
BB. Not covered with silvery hairs. 
C. Cuneus entirely white. 
a. Posterior thighs dark .. ee .. salicellus. 
b. Posterior thighs not dark... +. sunguineus. 
CC. Cuneus not entirely white. 
D. Colour obscure brown oe ** -» lepidus. 
DD. Colour not obscure brown. 
KE. Thighs spotted more or less all over. 
a. Cuneus widely pale at the tie nar- 
rowly at the apex .. ++ TOSCUS. 
b. Cuneus narrowly pale at the ace! not 
pale at the apex os Se .. alnicola. 
EE. Thighs spotted only at the apex. 
a, Apical joint of antennz about half as 
long as the third. .. ar o. UUriANS. 
b. Apical joint of antennz considerably 
more than half as long as the third.. Xirschbaumi. 
