surprise in the neighbourhood where they were 

 discovered. A mile or two southward of Phila- 

 delphia, and near the river Delaware, an old 

 cherry-tree was blown down by a violent cur- 

 rent of wind, and my informant saw the remains 

 of numerous individuals, in and about a cavity 

 of the tree, laid open by the shock of its fall. 

 That there might be no mistake as to the spe- 

 cies, he exhibited the thorax of a male he had 

 chosen from the mutilated fragments. 



I think it highly probable the tityus is more 

 especially a native of the southern states, as my 

 friend, Mr. J. Gilliams, presented me with seve- 

 ral specimens in high perfection, collected by 

 himself in Maryland; and from these, the draw- 

 ings for the annexed plate were made. 



The length of the male, exclusive of the 

 horns, is two inches, and the greatest breadth 

 one inch. In colour it resembles the S. Her- 

 cules^ being glaucous with brown spots, or brovm 

 with glaucous spots. These spots vary consider- 

 ably in size, figure, position and number, being 

 sometimes confluent, and exhibiting a clouded 

 appearance. The elytra of one specimen in my 

 collection are entirely chesnut-brown, immacu- 

 late, and the larger thoracic horn frequently 

 occurs simple, or undivided at tip, as exhibited 



PLATE IV. 



