146 ORDER ORTHOPTERA. 



Locust A oorallina. 

 Color lii^Iit brown, sometimes dark. The wing-covers are marked towards tlicir tips with 

 a triangular yellowish spot, and two or three others on the same line more or less 

 obscure. Anterior border of the wings brown and variegated : the base is vermilion, 

 and widely bordered with brown or dusky and nebulous ; the inner portion of the 

 border darker than the outer, and the apex is still darker or more dusky. 

 Appears early in the spring : is rather smaller than the preceding, and more active. 



LOCUSTA SULPHUREA. 



Color brown, rather uniform in this respect, the wing-covers rather lighter at the apex ; 



h&ae of the wings sulphur-yellow, varying in brightness in different individuals ; 



mai^in broadly bordered with dusky, which extends in a sharp triangular patch upon 



the three ncrvures towai-ds the base ; wing translucent, darker at the apex : abdomen 



yellowish. 

 This is subeqnal to the corallina, appears rather later in the season, and frequents dry 

 places. 



LocusTA NKBULOSA? (Harris). ( Plate ix, fig. 7.) 



Color brown : thorax ridged, or furnished with a keel-like elevation, and divided in the 

 middle by a transverse fissure ; wings transparent, with a duskiness of the anterior 

 margin ; thighs banded transversely with yellowish and brown ; tibiee brown. 

 This species, though very common in Western Massachusetts, is described in part from 

 the figure, the original specimen being lost. So far as I can determine under the circum- 

 stances, it is the nebulosa of Harris, and yet he does not speak of the banded markings of 

 the thighs : in other respects, it agrees with his description of that species. 



Gfnus ACRYDIUM. 



Tliis genus diflers from Loccsta, in having a spine beneath, between the forelegs : the 

 ridge upon the top of the thorax is wanting or obsolete ; and the antennae are generally 

 longer, in consequence of the joints being more elongated, consisting of 24 or 25 joints. 



ACEYDIUM FEMORRUBRUM. ( Plate ix, fig. 4.) 



Color olive-bro\vn above, yellowish green beneath : autenuje pale yellow or olive, darker 

 at the tips ; face green or yellowish green ; thorax marked with two yellowish lines 

 extending between and along two outer angles, olive-brown upon the top ; also an- 

 other triangular area extending backward from each eye, the base resting upon it. 

 Wing-covers olive-brown, lighter upon the angles. Lower end of the femur sui-rounded 

 by a black belt, and the upper end of the tibia marked in the same way. Yellow 

 predominates upon the thighs beneath and inside ; top brown and reddish brown ; 

 tibia? and tarsi bright red, terminated by four spines : beneath yellowish. 



