Descriptions of two new species of Scorpions : by A. G. 

 Butler, F.L.S., F.Z.S., &c. 



Chactas literarius, n. sp. 



Colours: — Above pitchy, the vertex of cephalothorax, 

 mandibles, cheliceres and legs shining castaneous ; tail 

 dark castaneous, with a triangular black spot in the centre 

 of the iirst four segments, fifth segment black behind, 

 vesiculus with a central oval ochreous spot ; below, pectus 

 and coxae testaceous ; abdomen blackish at the sides, the 

 segments olivaceous in front, ochraceous behind ; tail dark 

 castaneous, the segments with a cuneiform black streak on 

 each side. 



Structure very similar to U. granosus, cheliceres rather 

 longer and slightly more slender, chelae finely and sparsely 

 punctured, a few coarse punctures here and there ; pincers 

 longitudinally irregularly striated, rugulose internally; 

 mandibles coarsely toothed ; first five segments of ab- 

 domen above with a central W-shaped depression ; caudal 

 segments rather short and broad, deeply and abruptly cleft 

 anteriorly above, and excavated posteriorly ; last segment 

 and under surface of vesiculus slightly hairy; other seg- 

 ments below more or less distinctly bipunctate anteriorly ; 

 body below tolerably smooth and shining, pectin es with 19 

 lamellae; abdominal segments with a well-marked longitii- 

 dinal depression on each side : length 36 mm. 



Soriano, Uruguay (Thos. Havers). 



Type B.M. A very pretty little species. 



Chactas Haversii, n. sp. 



Allied to the preceding, above pitchy, hind margins of 

 segments dull clay-coloured ; pincers of cheliceres and 

 mandibles castaneous ; body below dark olive-brown, a 

 lateral fold, the hind margins of the segments and pectines 



