432 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
the late nymph or adult stage. Walden records it from Center- 
ville, East Haven, Hamden, Mt. Carmel, New Haven, Orange, 
and Southington, Ct. 
BicoLORED Locust; Short-winged Green Locust. 
Dichromorpha viridis (Scudder). 
Fig. 80; Plate 20, figs. 4, 5. 
Chloealtis viridis Scudder, Boston Journ. Nat. Hist., vol. 7, p. 455 (1862). — 
Smith, Kept. Ct. Bd. Agric. for 1872, p. 374 (1873).— Fernald, Orth. 
N. E., p. 36 (1888). 
Dichromorpha viridis Morse, Psyche, vol. 7, p. 383 (1896). — Walden, Bull. 
Geol. Nat. Hist. Surv. Ct., no. 16, p. 76 (1911). 
Vertex of head horizontal, shorter than broad, the margins 
sloping upward from a semicircular depression, the mid-carina 
absent. Pronotum with sides parallel, lateral 
and median carinae equally developed; front 
margin truncate, hind margin very slightly 
rounded or angulate. Tegmina widened on cos- 
tal margin opposite base of hind femora, taper- 
ing rapidly in both directions. Subgenital plate 
of male very short and bluntly conical. Ovi- 
positor valves moderately exserted, stout, short- 
pointed, smooth-edged. 
Color: in general, almost uniform grass-green 
or brown above; or, green above and with the 
sides of the head, pronotum, and lateral portion 
of closed tegmina varying from brown to fuscous. 
Beneath, pale grayish or yellowish green or 
brown. 
Measurements. 
Hind femora Antenna 
Fig. 80.— Bicolored 
Locust, Dichromor- 
pha viridis. Female. 
(After Lugger.) 
Body Tegmina Tegmina 
(long-winged) (usual) 
Male 15-16 14 6-9 9.5-10.5 6.5-8.5 
Female 23-27 19 8-10 14 -15 7-8 mm. 
This Locust is dimorphic both in wing-length 
and in color. The tegmina vary from forty to fifty per cent in 
length in short-winged examples, and are nearly or quite double 
that length in the long-winged form. Long-winged males are 
A 
