534 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Color pattern resembling that of A. ornaium. A variation 
which sometimes appears in this species consists of a pair of 
oblique white dashes on the shoulders. 
Measurements. 
Total Pronotum Hind femora 
Male 8.5-12 8 -11.5 5 -5.5 
Female 10 -13 9.5-12 5.5-6 mm. 
This is a shorter and stouter form of the southern Acrydium 
arenosum (which does not occur in New England so far as known). 
Short-winged examples of this form are quite likely to be mistaken 
for the so-called triangularis form of the Ornate Pygmy Locust, 
and the two species quite generally occur together, or at least 
frequent the same sort of environment, — damp spots on fields 
of sandy loani; roadsides through springy land, and wet, sandy 
humus generally. 
I have seen numerous specimens taken in different parts of New 
England, ranging from Cherryfield, Me., and Newport, Vt., in 
the north, to New Haven, Ct., and Nantucket Island. Extra- 
limitally it is found in most of the eastern half of the country. 
Hooded Pygmy Locust. 
Paratettix cucullatus (Burmeister). 
Fig. 98; Plate 24, figs. 15, 16. 
Tetrix cucullata Burmeister, Handb. d. Ent., vol. 2, p. 658 (1838). 
Tettix cucullata Scudder, Boston Journ. Nat. Hist., vol. 7, p. 475 (1862). — 
Smith, Rept. Ct. Bd. Agric. for 1872, p. 382 (1873).— Fernald, Orth. 
N. E., p. 47 (1888). 
Paratettix cucullatus Morse, Psyche, vol. 7, p. 163 (1894). — Walden, Bull. 
Geol. Nat. Hist. Surv. Ct., no. 16, p. 69 (1911). 
Easily distinguished from our other Pygmy Locusts by the 
form of the vertex: this is barely wider than an eye, scarcely 
projects beyond their front margin, and is slightly concave, with 
a small mid-carina. In profile the frontal costa is strongly 
protuberant opposite the base of the antennae. Eyes large and 
prominent. Pronotum broad at shoulders, depressed rather 
than compressed, almost invariably caudate, the front margin 
truncate, covering the head to the eyes (whence the name 
