62 
PSYLLA BAGNALLI (HARRISON): A NEW 
SPECIES OF PSYLLID: 
J. W. HESLOP HARRISON. B.Sc. 
Middlesbrough, 
IN the main the genus Psylla (Geoffroy) is very homogeneous 
but even in it are some small but well marked groups of closely 
allied species; these, however, are not sufficiently distinct 
from the main groups to be dignified with even subgeneric 
rank. Such a minor group is formed by the subject of the 
present paper, Psylla bagnalli (mihi) and the three species Ps. 
melanoneura (Forster), Ps. nigrita (Zetterstedt), and Ps. sub- 
ferruginea (Edwards). In addition to these, I possess a fifth 
species, provisionally named Ps. proxima, allied to Ps. melan- 

Male caude. 
Fig. I.—Ps. bagnalli. | Fig. I1I1.—Ps. melanoneura. 
», Il.—Ps. subferruginea. ,, 1V.—Ps. nigrita. 
oneuva, but differing from it in thoracic pattern and, more 
particularly, in the genal cones which, instead of being approxi- 
mated and darkish, diverge widely and have somewhat knobbed 
whitish tips. This I refrain from describing as up to the 
present I have only taken specimens of the femalesex. Judging 
from the food plants, the group is northern in origin for Ps. 
nigrita and possibly Ps. -melanoneura feed on Pinus; Ps. sub- 
ferruginea on birch, and Ps. bagnalli on rush. 
PSYLLA BAGNALLI (sp. n.). 
Length of body 1°8-2 m.m.; wing length, 2°25 m.m.; 
width of head °75--°8 m.m. General colour reddish orange. 
Vertex broad, twice as broad as long, pale in colour, tending 
to white centrally. Genal cones palish, almost white, yellow- 
ish at the base, pubescent, not divergent, rounded at the tip, 
about four-fifths as long as the vertex. Eyes, blackish in 
front, then sharply rust coloured and posteriorly white. Front 
-ocellus reddish orange. -Antennae.one and a half times as 
long as breadth of head, joints 1, 2 and 3 fuscous, 4, 5, and 6 
black at apex, fuscous at base, 7, 8, 9, and 10 black, 9 and 10 
Naturalist, 
