2 54 ENTOMOLOGISK TIDSKRIFT 1902. 



with the following words. »Andererseits finden sich auch Exem- 

 plare, deren Céphalothorax und Abdomen bis auf das letzte Seg- 

 ment beraucht ist (wohl als Varietät zu trennen)»". None of 

 the specimens now on hand showed namely the three longitudinal 

 stripes on the back of the trunk. The genus Titytis includes, 

 however, so many uniform and only with difficulty discernible 

 species that I wanted to make sure by asking the author of 

 this species about his opinion. I had the more reason to do 

 so, as I had no suitable material for comparison. Director Kr^- 

 PELiN most kindly answered at once: »Der Titytis entspricht in 

 jeder Hinsicht meinem T. trivittaUis wie Sie bereits vermuteten», 

 and he added that the dark colouration of the back was most 

 probably to be regarded as a juvenile characteristic. The 

 largest specimen collected by Baron Nordenskiöld has a total 

 length of about 55 mm , but it is dark coloured all over the 

 back with the exception of the last segment. Director Kr.«pe- 

 LiN says, however, in his letter that this one is »erheblich klei- 

 ner» than the striped specimens of the Hamburg Museum. Dr. 

 BoRELLi has found a specimens of his variety confliicns measuring 

 60 mm. in length. This one was also found in Bolivia. But 

 the same author has striped specimens from Paraguay and Argen- 

 tine only measuring 55 mm. in an adult stage. The length of 

 the species is in »Tierreich» (1. c.) indicated to be »bis 50 

 mm.». The small youngs in Baron Nordenskiöld's collection 

 have an identical colouration as the large ones although the legs 

 and tail are of a paler yellow. Comprising all these facts I 

 think I may be justified in expressing my opinion in the fol- 

 lowing way. In Bolivia is to be found a variety of Ti'yiis 

 trh'ittatiis Kr.ïpelin, named by Borelli confluens, which 

 even in the adult stage has retained a juvenile characteristic 

 viz. a dark colouration of the back with the exception of the 

 last segment. 



The striped type-specimens were from Paraguay. 



Tierreich: 8 Lief. Scorpiones p. 83. Berlin i! 



