and Species of Scorpions. 3 1 o 



Pectines furnished with 15-16 teeth ; the basal intermediate 

 lamella not produced. 



Measurements in millimetres. — Total length 40'5, length of 

 carapace 4*8, of tail 23 ; width of second and fifth caudal 

 segments 2*3, of vesicle 1'5. 



Two female specimens from British Guiana collected by 

 Mr. J, J. Quelch, to whom I have great pleasure in dedi- 

 cating the species. 



This species differs from T. colamhianus in being paler in 

 colour, especially beneath, but chieflly in having the spine 

 on the vesicle of the tail very large and triangular. 



The British Museum has also a dried specimen of a scorpion 

 which I believe to be the male of T. Quelchii, from Para. In 

 this specimen the tail is long and slender, being nearly six 

 times the length of the carapace. The whole animal measures 

 about 34 miliim. 



Tityus pusillus, sp. n. 



$ . Nearly related to the preceding, but more distinctly 

 spotted with black ; the maxillary lobes, however, are not 

 fuscous, and the fifth caudal segment and the vesicle of the 

 tail are of the same tint as the rest of the tail and not con- 

 spicuously infuscate as in T. Quelchii and T. columhianus. 



Trunk carinate and granular above as in the preceding 

 species ; the lower surface perhaps rather more coarsely and 

 closely granular. 



Tail a trifle more than five times the length of the carapace, 

 slender, nearly parallel-sided, the fifth segment being only 

 very slightly wider than the second ; the vesicle a little more 

 globular than in T. Quelchii, with proportionately larger 

 tooth, but with much less distinctly defined granules ; the 

 fifth caudal segment also less distinctly granular, and the 

 terminal tooth of the superior caudal keels is only a little 

 larger than the rest upon the third and fourth segments. 



Tal]>i and legs as in T. Quelchii, but with 14-15 rows of 

 teeth along the middle series of the digit. 



Pectines with 16-17 teeth, the basal intermediate lamella 

 slightly produced. 



Measurements in millimetres. — Total length 32, length of 

 carapace 4, of tail 20+ ; width of fifth caudal segment 16, of 

 vesicle 1"3. 



(J. A little smaller and slenderer than female, with tail 

 slightly longer, being a little more than five and a half times 

 the length of the carapace. Pectines much larger, with 17-18 

 teeth. 



Two specimens in alcohol, collected by i\[r. G. A. Ramage 

 at Iguarassu. 



