lönnberg: scorpions coll. in n. w. argentine and BOLIVIA. 255 



Farn. Bothriuridae. 



Brachiosteniiis Wcijoibcrghi (Thor.) forma interuicdia n. 



Two specimens from Ojo de aqua in the province de Salta, 

 Northwestern Argentine, are interesting because they seem to be 

 intermediate between B. Weijoiberghi and B. Ehrenbergi such 

 as these are defined by Kr.epelin (Tierreich I. c). They resemble 

 namely the latter species therein that a granulated median keel 

 can be distinguished on the lower surface of the fifth caudal 

 segment, and the proximal granules of the lateral series on the 

 movable finger have a tendency to move in among the main 

 series. On the other hand, however, there are only three tricho 

 bothria on the lower surface of the tibia and 5 — -6 such ones on 

 the lower side of the hand as in B. Weijenbcrghi. The first 

 caudal segment is as broad as long, the second conspicuously 

 longer than broad. From this it becomes probable that future 

 investigations shall show that the western B. Ehreitbergi is con- 

 nected with the eastern, B. WcijciibcrgJii by a series of inter- 

 mediate forms and these specimens having been collected rather 

 far west constitute some of the intergraduating links. 



BotJiriurus Dorbig^iyi (Guér.). 



This species is represented by several specimens from dif- 

 ferent localities viz. 2 sp. from Tatarenda, Bolivian Chaco, i 

 young sp. from Crevaux at Pilcomayo, Bolivian Chaco, i young 

 sp. from Arroyo del medio. Prov. de Jujuy, Northwestern Argen- 

 tine, I sp. from Aqua Bianca in the same province and 2 large 

 specimens from S:ta Clara in the same province. The two last 

 ones are remarkable for their great size as they have attained a 

 length of 106 mm. This is not less than 20 mm. more than 

 the maximum length recorded by Kr.epelin (1. c). Borelli 

 did not obtain any larger than 75 mm. 



