NOTES ON MILLIPEDES. 33 



swollen foot and much pain : we were able to bathe the foot 

 almost immediately in a very strong solution of permanganate 

 of potash and the pain subsided in a quarter of an hour. 

 Colour. 



Yellow mottled with brown, the four pairs of breathing 

 orifices on the abdomen being very conspicuous as lemon yellow 

 spots. A small specimen (36 mm. in length) was coloured 

 pinkish underneath. 

 Young. 



I have not been able to make out at what times of year 

 these scorpions breed. On the 9th May in Bangkok I caught a 

 young one (10 mm. in length) by itself, and on the 3rd August 

 also in Bangkok found one (11 mm. in length) being carried 

 about on its mother's back. 

 Sexes. 



Mr. R. J. Pocock. in answer to enquiries, writes to me: 

 -In A. mncronatus the male has the tail stouter and the claws 

 longer with sinuate lingers, as compare;! with the female." 

 Size. 



Length from front of mandibles to tip of sting of 38 adult 

 Siamese specimens which I have examined: — 



average 4-H mm. smallest, 36 mm. 



largest, ')'"> mm. (roughly 2| inch.) 



Pectinal Teeth. 



Usually about 21 on each comb, occassionally there is one 

 more tooth on one side than on the other, and once I found a 

 specimen with two more teeth on one side than the other i. e. 

 10 and 21. 



The fewest I have counted were in a Bangkok specimen, 

 i. e. 18 and 18 : the most I have counted were in a Dong Phya 

 Phai specimen, i. e. 24 and 24. 



2. Archisometrus scatilus, C. K. 



This is is a small yellowish-brown scorpion with very long 

 attenuated claws and tail ; I caught one specimen under the 

 bark of a fallen tree in the Experimental Gardens, Penang Hill, 

 about 1900 feet elevation, and one in the verandah of "the 

 Crag." Penang Hill, 22G0 feet elevation, both in March 1898. 

 This species is also recorded from Tenasserin, Selangor, Singa- 

 pore, Sumatra and Java. 



