Scorpions and Centipedes from Madras. 239 



or 116 millimetres. If, then, it be compared with specimen 

 G in the list, which is 115| millim. in total length, it will be 

 found that the other figures agree remarkably well, the only 

 exception being that the length of the tail in asper is far too 

 little, being 60 as opposed to 63. But if we take the 

 measurement as given by Dr. Thorell of each caudal seg- 

 ment separately, we find that the total amounts to 6 If. Thus 

 only a slight difference is left, and this needs no accounting 

 for if it be remembered that 63 represents the length of the 

 segments plus the arthrodial membrane, whereas 61f is the 

 length minus this membrane. The type of asper, then, 

 appears to be a young male of Swammerdami. 



Dr. Karsch describes his species as follows : — - u Pandinus 

 Kochii (Peters, MS.), quam formam a Pandino Swammer- 

 dami (E. S.) differre nullo niodo possum quam magnitudine 

 minore, ca. 105, in Swammerdami 158 mm. ; sed Thorell 

 cephalothoracem hujus speciei caudae segmentis l° + 2° con- 

 junctim nuilto breviorem descripsit, qui in nostra forma in 

 duobus exemplis siccatis ex Java segmenta l m + 2 m caudae 

 anteriora longitudine omnino eequat et ad P. asprum, Thor., 

 speciem minorem long. ca. 97 mm. cadere non potest, quum 

 Thorell ejus cephalothoracem segmentis caudge l° + 2° conj. 

 parum breviorem describeret et species nostra P. Swammer- 

 dami nee P. aspri seulpturam ostendat," 



It is clear from what is written above that at the time Dr. 

 Karsch had not seen a specimen of S. Swammerdami; con- 

 sequently the statement about the sculpture of his species 

 must be treated with caution. For the rest, the difference in 

 the length of the first two caudal segments observed between 

 Swammerdami, asper, and Kochii is, as we have shown, a 

 character dependent upon age and sex. For instance, in 

 specimen N in our table — a young female — the cephalothorax 

 equals in length the first two caudal segments. 1 believe 

 therefore that the types of Kochii are young females of 

 Swammerdami. It must be admitted, however, that an 

 element of doubt on this point exists on the strength of Java 

 being assigned as the locality for the species. 



JVlons. F. Simon separates tuoidipes from Swammerdami 

 for the following reasons : — the size is smaller, the legs are 

 bright yellow, the hand is much smoother and a little wider 

 than long (in Swammerdami it is exactly as wide as lon^), 

 the fifth caudal segment is the same length as the cephalo- 

 thorax (a little longer in Swammerdami), of the same width 

 as the vesicle, and strongly channelled above in its upper 

 half (a little narrower than the vesicle and scarcely chan- 

 nelled in Swammerdami). But each of these as a specific 



