APPENDIX F. ARACHNIDIANS. 241 



Upon a close examination of several specimens of this species obtained 

 from western Florida, we satisfied ourselves that it belongs to the sub- 

 genus Atreus instead of Buthus, in which it was placed by Thomas Say. 

 It so happens that the specific name of vittatus has since been given by 

 Guerin to another South American species of scorpions ; and if we pro- 

 pose here to replace Say's specific name, against the received law of 

 priority, we would remark that when full grown, the vittas entirely dis- 

 appear, and the color becomes uniform deep reddish brown, the legs and 

 under surface being lighter. In this species the tail is once and a half 

 the length of the body. The palpi are proportionally small, and in the 

 young exiguous. The chelse are slender, slightly curved, with an undu- 

 lation at their base, but without marked denticulations. The upper sur- 

 face is finely granular. There are from thirty to thirty-two lamina to 

 the abdominal combs. " Fuscous, with three fulvous vittae, sides black," 

 applies strictly to the immature state. 



Specimens of this species were sent from Pensacola, Florida, to the 

 Smithsonian Institution, by Dr. Jeffrey, U. S. N., and Dr. J. F. Ham- 

 mond, U. S. A. 



A species very closely allied, if not identical with Scorpio (Atreus) 

 sayi, is not uncommon in Texas, where several specimens were collected 

 by Lieut. D. N. Couch, U. S. A. 



IV. PSEUDOSCORFIONID^I. 

 Observations upon Galeodes subuxata of Thomas Sat. 



Two species of this genus are described by the same author in Major 

 Long's Expedition ; * one under the name of Galeodes pallipes, the 

 other under that of G. subulata, the only difference between them con- 

 sisting in the structure of the cheliceraj, which in G. pallipes are termi- 

 nated by arcuated claws, armed within with many robust teeth, whilst 

 in G. subulata the upper claw is nearly rectilinear, and the lower one 

 alone possessed with two robust teeth. 



Having but one individual of this genus at our command, we are not 

 prepared to decide upon the question of the validity of both species. 

 The specimen before us answers to Say's characters of G. subulata; and 

 being perfectly satisfied that it belongs to the latter species, we propose 

 to describe it a little more at length than was done by its discoverer. 



* Account of an expedition from Pittsburg to the Rocky Mountains, performed 

 in the years 1819 and '20. Vol. II, 1823, p. 3. 

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