Generic Distinction between Scorpio and Palamngeus. 75 



February, and October in Central Africa, according to our 

 dated specimens. T. regina does, however, occur in the dry 

 season. 



26. Papilio demoleus. 

 Papilio demoleus, Linnaeus, Mus. Lud. Ulr. p. 214 (1764). 



S, Henga, W. of Lake Nyasa, Jan. 26th, ]895. 



" Large yellow and black velvet Swallow-tail " {R. C). 



27. Papilio leonidas. 



Papilio leonidas, Fabricius, Ent. Syst. iii. 1, p. 35 (1793). 



? , Foot of Jakwa Mountain, Henga to Nkamanga, 

 Jan. 23rd, 1895. 



"Turquoise and Black " [E. C). 



28. Papilio pseudonireus. 

 Papilio pseudonireus, Felder, Reise der Nov. Lep. i. p. 94 (1865). 

 2 (J, Kantorongondo Mountain, 5900 and 6975 feet, 

 Nyika, April 15th and 16th; ?, Cheni-Cheni Mountain, 

 6100 feet, Nyika, April 17th, 1895. 



" Blue and black Swallow-tail" [R. C). 



X. — On a new Generic Distinction between the Scorpions 

 of the Genera Scorpio and Palamngeus. By R. L PococK. 



In the Ann. & Mag. Nat. Hist, for 1876, vol. xvii. pp. 12-13 

 Dr. Thorell split the large black scorpions of tropical Africa 

 and Asia into two sections, proposing for the African and 

 Indian species the term Pandinus, characterized by the thin- 

 ness of the inner border of the hand, and for some species 

 inhabiting Indo-Malaya, characterized by the thicker and 

 more rounded appearance of this border, the term Palamncem, 

 Since, however, africanus of Linnaeus is the type of Pandinus 

 and also the type of Scorpio, most of Thorell's successors 

 have, on the grounds of priority, adopted the latter title in 

 preference to the former ; while Palamnceus, of which the 

 type is Petersii, Thor. (probably identical with spinifer, 

 Hempr. & Ehrb., and possibly with longimamis, Herbst), 

 has been allowed to remain as symbolizing a more or less 

 accuiately definable form. The character, however, upon 

 which Palamnceus was based cannot be said to be of very 



