8 B. H. BUXTON 



fore the labyrinth runs forward as a single tubule from segment 

 IV to the outlet on segment III. 



Note on the distribution of the Uropygi. Gravely ('12) suggests 

 that Hypoctonus of Burma is hemmed in and is being gradually 

 displaced by the more highly specialized Thelyphonus sepiaris 

 of India on the one hand, and Thelyphonus linganus of the Malay 

 Peninsula on the other; the latter being closely allied to other 

 species found in the Malay Archipelago, where he supposes that 

 this branch of Thelyphonus originated. 



The Hypoctonus kraepelini found on Hangkawi Island is 

 rather small, with red legs; the species having been previously 

 unknown to M. Eugene Simon, to whom I gave some specimens. 

 There is one specimen in the Indian Museum at Calcutta, from 

 the northern (Siamese) region of the Malay Peninsula, found 

 and named by Annandale some years ago, but I do not know of 

 any other, nor is any other species of Hypoctonus known to occur 

 outside of Burma. 



In Perak and Kedah, British controlled States of the Malay 

 Peninsula, Thelyphonus linganus is very common; but I found 

 lonly one specimen of Hypoctonus kraepelini, in the jungle far 

 removed from any settlement, near the Siamese border. On 

 Langkawi Island, only a few miles from the Kedah coast, there 

 are no Thelyphonus, but everywhere in the primaeval jungle 

 one can collect numbers of Hypoctonus kraepehni, although 

 they do not occur where the jungle has been cleared. The 

 .'species seems to have been left undisturbed on the island, but on 

 the mainland it has become very scarce, owing to pressure by 

 Thelyphonus linganus. 



It may also be noted that Tartarides (Schizomus modestus) 

 are very common in Kedah and Perak on the mainland, but dur- 

 ing a month's stay in Langkawi I did not find a single specimen. 



GROUP II. III. SOLIFUGAE AND PALPIGRADES 



Solifiigae 



The coxal gland of the Solifugae was fully described in the 

 previous monograph, and a study of a considerable number of 

 additional specimens goes to confirm the results already ob- 



