242 [April, 
} 
I.—Crown short, along the posterior margin almost four times wider 
than the breadth across the centre. 
Ferruginous-brown. Elytra: corium with two large, somewhat 
triangular, white patches, next the anterior margin, placed 
one near and one beyond the middle; at the apex of the 
clavus, a short, transverse, white streak. 
var. 1. White, or greenish-white ; scutellum, except the apex, 
black. Elytra: corium, the anterior margin before the 
middle with a somewhat square dark brown patch, and a 
broad, oblique, dark brown band, extending from beyond the 
middle to the apex of the clypeus. 
var. 2. Dark brown. Elytra: corium, anterior longitudinal half, 
white, or yellowish-white. 
var. 3. Black. Head, and anterior half of the pronotum, yellowish- 
white. Elytra: corium with a faint yellowish spot towards 
the apex of the anterior margin.............-.1. spumarius,* L. 
Pale cinnamon-brown, or fawn colour. Elytra: corium with two 
large white patches of irregular shape next the anterior 
margin, placed one before and one beyond the middle... 
2. campestris, Fall. 
Yellowish-brown to dark brown, with a faint bronzy hue. Elytra: 
corium with a white streak along the anterior margin, extend- 
ing from the base to past the middle, beyond which is a large 
white patch. ........ c:eccseseserses eB. ewclamations, Thunb. 
II.—Crown somewhat elongate; along the posterior margin scarcely 
three times wider than the breadth across the centre. 
Pale yellow. Elytra: corium with a black streak along the Ist 
nerve; remaining nerves pale brown ..... ......4. lineatus, L. 
The members of this genus appear strictly to be attached to 
grasses and other low plants, and never to occur upon trees or shrubs, — 
except by accident. 
P. spumarius is certainly the commonest of all our species of 
Homoptera, and is met with throughout the whole summer everywhere | 
and by everybody. | 
P. exclamationis is the smallest of the four species; and, although | 
not common, it is widely distributed. Leicestershire (Marshall) ; | 
Qlanville’s Wootton (Dale); Mickleham, Sanderstead Downs, Rich-_ 
mond Park, Seaford Downs, &c. (Douglas and self). Time of appear- | 
ance, July and'August. Length, 13 lines. 
* There are other varieties, but the above examples are sufficient here. 
