Psylla bagnalli (Harrison): a new species of Psyllid. 63 
forming a slight club. Mouth parts blackish. Pronotum 
outlined in black anteriorly, pale (almost white) behind with a 
fine black line terminally; praescutum reddish orange ; 
scutum the same, thoracic pattern much the same pattern as 
in Ps. melanoneura but very indistinct. 
Wings smoky fuscous, clearer in the two basal cells and 
near the veins. Pterostigma pale, appears white in some 
lights ; veins brownish black. 
Legs rather stout, palish, claws blackish; spur at base 
of tibiae obsolete but two or three black bluntish spines at 
apex ; claws blackish. Abdomen paler, in some cases even 
greenish. 
GENITALIA—MALE.—Anal valve longish but quite typical, 
finely hairy as are also the forceps which are rather small, 
sinuate or thumb-like in outline ; forceps one half the length 
of valves. 
FEMALE.—Genital segment very long, as long as the rest 
of the abdomen. Dorsal valve long, slender pointed, longer 
than the ventral valve. 
Hapitat.—Taken by Mr. R. S. Bagnall, after whom I 
have named it, on rushes on Blanchland Common, Northumber- 
‘land. 
The nearest ally of the present species is Ps. swbferruginea, 
but it is readily distinguished from that form by its size, for it 
is only about two thirds of the size of P. subferruginea. 
Structurally, the two are edsily separated in the male sex by 
the genitalia. The genitalia of Ps. bagnalli bear much the 
same relation to those of Ps. ferruginea as do those of Ps. sub- 
melanoneura to those of P. nigrita. 
The males of the four allied forms can be easily recognised 
by the following table, and when once the males are known the 
females are just as readily separated on general characters :— 
(1) General colouration of insect,reddish brown or orange ; 
forceps one half the length of the anal valve (2) 
Insect dark in tone ; forceps two-thirds or more the length 
of the anal valve (3). 
(2) Insect smaller; outer edge of forceps sinuate, Ps. 
bagnalli (mih1). 
Insect larger ; outer edge of forceps concave, Ps. subferru- 
ginea (Edw.). 
3. Outer edge of forceps distinctly sinuate, Ps. melanoneura 
(Forst). 
Outer edge of forceps basally sate uneh) concave toward 
_ the tip, Ps. nigrita (Zett.). 

Ree Tae tO e 
Mr: C. B. Moffat writes.on ‘.The Crossbill and its Diet’ in The Insh 
Naturalist for January. 
“W916 Feb. 1. 
