458 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Clouded Locust; Dusky Locust; Dingy Locust. 
Encoptolophus sordidus (Burmeister). 
Fig. 83; Plate 21, fig. 6. 
Oedipoda sordida Burmeister, Handb. d. Ent., vol. 2, p. 643 (1838). — 
ScxjDDER, Boston Journ. Nat. Hist., vol. 7, p. 473 (1862). — Smith, Proc. 
Portland Soc. Nat. Hist., vol. 1, p. 151 (1868); Rept. Ct. Bd. Agric. for 
1872, p. 373 (1873). 
Locusta nebulosa Harris, Treatise, 3d ed., p. 181 (1862). 
Encoptolophus sordidus Fernald, Orth. N. E., p. 41 (1888). — Morse, 
Psyche, vol. 7, p. 66 (1897).— Walden, Bull. Geol. Nat. Hist. Surv. 
Ct., no. 16, p. 92 (1911). 
Body compressed. Head large, round, and full; scutellum of 
vertex broad, triangular; facial costa narrowed at vertex, sulcate 
throughout in male, above ocellus in female. Pronotum with 
disk rather flat, mid-carina sharp but not very high, cut by princi- 
pal sulcus but little in front of middle; lateral carinae continuous; 
front margin convex, hind margin obtuse-angulate, apex rounded; 
lateral lobes but little deeper than wide, the lower margin strongly 
sinuous. Tegmina short, but little exceeding the hind knees, 
about one and one-third times as long as the hind femora; inter- 
calary vein straight, nearer ulnar than radial throughout its 
course. 
Color: dull brown or gray, heavily marked with blackish, often 
with a pallid X-mark on the pronotum. Tegmina strongly fasci- 
ate with fuscous. A velvety black triangular spot on upper side of 
hind femora on the second of a series of four transverse bands, the 
two basal of which are united more or less completely on the inner 
and under side. Hind tibiae dark brown or blackish, often more 
or less bluish, with strong black spines and a pale annulus below 
the knees. Wings transparent, clouded with yellowish at base 
and dusky on apical half, deepening toward tip. 
Measurements. 
Total Body Tegmina Hind femora Antenna 
Male 21-28.5 19-21.5 16 -19.5 11-12 8-9 
Female 28-32.5 24-35 20.5-34 14-15.5 S-9 mm. 
This Locust is readily recognized from its superficial appear- 
ance, no other of our species resembling it in coloration or pattern. 
The variety of colors which it wears is very limited, the ground 
