Psylliodes. ] PHYTOPHAGA, 389 
is, therefore, most important that all rubbish should be removed and 
destroyed ; the quicker the bines grow, the less the injury that will be 
caused (as is the case with turnip crops when attacked by the turnip- 
fly), and therefore the addition of a little rich manure to the ground is 
very beneficial, as suggested by Miss Ormerod (Manual of Injurious 
Insects, p. 105); P. attenuata is, apparently, almost confined to the hop, 
and is therefore a very local species ; but the very abundant and more 
or less omnivorous species, Plectroscelis concinna, also in some seasons 
does great damage to the hop crop as before noticed. 
The British species may be divided as follows:— 
I. Posterior tibiz longer and more slender, almost straight 
on their under-side; posterior femora moderately 
broad. 
i. Forehead with two distinct and deep furrows be- 
tween eyes, which cross one another and form an X. P. arrenvata, Koch, 
ii. Forehead with the furrows between the eyes absent 
or more or less obsolete. 
1, Under-side black or mostly black. 
A. Sculpture of elytra stronger, 
a. Length 33-4 mm. 
a*, Antenne longer and thinner ; colour vari- 
able, but upper surface usually bronze or 
bluish-green, except front of head which is 
TEQGISUG (ee os  eetine at erst? (ve, CHRYSOCHPHATA. Uli: 
‘b*, Antenne shorter and stouter; head and 
thorax always reddish-yellow, elytra blue. P. cYANOPTERA, III, 
b. Length 2-23 mm.; head black, thorax and 
elytra, except suture, testaceous. . . . . P. AFFINIS, Payk. 
B. Sculpture of elytra finer. 
a. Head and thorax brassy-green, elytra reddish- 
brownisasizedarger Sma bodies oer ates Scene 
b. Upper surface entirely bronze or blackish- 
bronze. 
a*, Punctuation of thorax distinct and rather 
Gee sates eter a ee ee es 
P. LURIDIPENNIS, Kuts. 
. CUPRHA, Koch. 
(cupronitens, Férst.) 
. INSTABILIS, Foudr. 
- NAPI, Koch. 
- MAROIDA, III, 
b*. Punctuation of thorax very fine. . , 
c. Upper surface blue or greenish-blue . , 
2. Upper and under surface testaceous . . . . . 
II. Posterior tibize short, considerably arched on their 
under-side ; posterior femora very broad. 
i. Legs pitchy-black, posterior femora dark blue or violet P. puLcAMAR, Koch. 
_ li. Legs in part reddish or testaceous. 
1, Punctuation of thorax double, consisting of larger 
and smaller punctures; size larger. 
A. Upper surface blue; rows of punctures on 
elytrarineraga s ule sets sauswle. ci Sek ne 
B. Upper surface bronze ; rows of punctures on 
ely Gna, Gee pe twemest tment suns =asen meee arse 
2. Punctuation of thorax simple ; size smaller. 
A. Upper surface entirely reddish-testaceous . . 
B. Upper surface dark bronze. . .... . 
Mit 
. CHALCOMERA, IIL, 
. HYOSCYAMI, L. 
. LUTEOLA, Mill. 
- PICcINA, Marsh. 
geline] Svlacl Ise] 
P. attenuata, Koch. Elongate ovate, moderately convex, neous 
