ACRYDII. 



571 



while the adult is yellowish brown with dark patches and 

 spots. 



In AcrycUum the spine on the chest is very prominent, and 

 the mesial crest above is well marked, while the tip of the 

 male abdomen is not swollen. AcrycUum alutaceum Harris is 

 nearly two inches long, and expands over three inches. It is 

 brownish yellow, with a paler yellow stripe on the top of the 

 head and thorax. 



To the genus Tropidacris, separated from Acrydium by Mr. 

 Scudder, belongs certain gigantic grasshoppers nearly' four 

 inches in length and expanding some eight inches, with gaily 

 colored hind wings. T. cristata Linn, has pale, greenish blue 

 hind wings ; it is 

 reported from Asia 

 and Africa, and is 

 widely distributed 

 through tropical 

 South America. T. 

 dux Drury has brick 

 red hind wings and 

 expands nearly sev- 

 en inches ; its range 

 is from Texas to 

 Panama. 



(Edipoda is a large 

 and well known ge- ^'^" ■^'*^' 



nus, in which there is no spine between the fore legs, and the 

 front of the head is vertical and swollen. (Edipoda Carolina 

 Linn, is pale yellowish brown, the wings black with a broad yel- 

 low hind margin, and it expands over three and a half inches. 

 It is abundant e^■erywllere. (E. sulphurea Fain-, has deep yel- 

 low wings, with a broad dusky band beyond the middle, while 

 (E. corallina Harris has hind wings of a rich coral red. (E 

 xanthoptera Geruuir (Fig. 505) ranges from New England to 

 the Mississippi. It is reddish brown ; the protliorax has a high 

 rounded unbroken ridge ; the fore wings are tlecked with small 

 dusk}' spots ; the hind wings are yellow at the base, fuscous 

 beyond and clouded at the tip ; the hind shanks are dusky, 

 with a pale band below the knee. The wings of the male ex- 



