530 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
others preferring soils perpetually moist or even the shores of 
lakes and streams. It is not difficult to secure by sweeping, and 
when plentiful may be picked up readily by hand as it hops 
erratically about, a foot or two at a leap, tumbling headlong as it 
falls to the ground. 
Adults are most plentiful in April, May, and October, but may 
be found in any month of the year. It undoubtedly passes the 
winter in this condition and probably also sometimes in the later 
nymph stages. It has been taken in every New England State 
from Ft. Fairfield, Me., to southern Connecticut. Extra- 
limitally the species covers the entire eastern half of the country 
and develops several geographic races. The caudate or large- 
winged form apparently occurs throughout its range, but is rare, 
probably not over five percent of individuals exhibiting this less 
specialized condition of the wings. 
Angulate Pygmy Locust. 
Acrydium granulatum granulattun Kirby. 
Fig. 96; Plate 24, figs. 13, 14. 
Acrydium granulatum Kirby, Fauna Bor.-Amer., Ins., p. 251 (1837). 
Tettix granulata Scudder, Boston Journ. Nat. Hist., vol. 7, p. 474 (1862). — 
Smith, Proc. Portland Soc. Nat. Hist., vol. 1, p. 151 (1868); Rept. Ct. 
Bd. Agric. for 1872, p. 382 (1873). 
Tettix granulatus Fernald, Orth. N. E., p. 46 (1888).— Morse, Psyche, vol. 
7, p. 154 (1894).— Walden, Bull. Geol. Nat. Hist. Surv. Ct., no. 16, p. 
68 (1911). 
This species is usually recognized without difficulty by its 
slender form and angulate vertex, which projects well in front of 
the eyes, sometimes with the apex very slightly rounded, or 
rarely with the mid-carina indicated. In profile the face is 
strongly retreating, the facial costa sinuate opposite the eyes 
and only moderately protuberant opposite the antennae. The 
pronotum is almost invariably caudate; the disk but little 
sloping, the lateral carinae parallel in front, the front margin 
truncate, or very slightly extended, sub-angulate. All the 
femora are slender. 
Color: sides and beneath uniform dark brown; above dark or 
light brown, uniform or sometimes speckled with dusky dots and 
often with two or more irregular velvety black marks on the 
