32 PERCY SLADEN TRUST EXPEDITION 
data of these specimens is as follows:—1. A specimen found on a sheep at Tomotoku, 
Gold Coast (H. Palmer). 2. One hundred and forty specimens captured by Dr S. A. 
Neave on the skin of a mole-rat (Lachyoryctes audax Thos.), at Emba, east of Mount 
Kenga. Some parasitic mites of the family Gamasidz were present in the same tube as 
these chelifers. 8. Pseudoscorpion found on Anas undulata, Seziwa Swamp, Chagwe, 
Uganda (S. A. Neave). 4. A specimen, Chelifer (Chernes*) sp., found on a mouse at 
Jung-ting-shan, China (Capt. H. E. M. Douglas). These details may perhaps throw some 
light on the distribution of Pseudoscorpions. Nos. 1—3 have been sent (together with 
many other unnamed specimens of this order) to Mr E. Ellingsen for determination. On 
receiving my list of them, Mr Ellingsen drew my attention to the fact that he had 
suggested* that Chthonius tetrachelatus Preyssler—a European Pseudoscorpion recorded 
by him as occurring in the Seychelles—might perhaps have been introduced into that 
locality by birds. It seems quite possible that false scorpions may be carried from one 
place to another by such means, but I think that it is more probable that this species has 
been introduced into the Seychelles through human agency, viz. by trade. In his paper 
on the Pseudoscorpions collected by the Danish Expedition to Siam, Mr C. J. With 
discusses their geographical distribution, and mentions that several species of these 
arachnids have been found at Copenhagen in rice on ships from India. Therefore this 
means of transportation must not be overlooked. 
It may, perhaps, be of interest to note that a species of Pseudoscorpion was collected 
by Dr v. Willemoes Suhm on the isolated islets known as St Paul’s Rocks, during the 
voyage of the “Challenger” (see Narrative of the Cruise, vol. 1. part 1, p. 205, 1885). 
Several years ago I sent his specimens to Mr C. J. With, who identified them as Chelofer 
garypordes Ell., a species discovered by Fea at Bolama, Portuguese Guinea. It seems to 
me quite possible that this chelifer has been carried to St Paul’s Rocks whilst attached to 
a bird ; otherwise it is extremely difficult to account for its occurrence there. Perhaps I 
ought to add that the three species of birds which are found at St Paul’s Rocks are widely 
distributed forms and occur also in Africa. 
SCORPIONES. 
1. Lychas brauert Krpln. 
Archisometrus brauwert Kraepelin, Mt. Mus. Hamburg, 13, p. 123 (1896) ; Kraepelin, 
Das Tierr., Scorp. &c. p. 46 (1899). 
Localities. Mahé (in high jungle) ; Silhouette; Praslin. Prof. Kraepelin’s specimens 
were captured on Praslin. 
2. Isometrus maculatus De Geer. 
Localities. Dennis Island and Bird Island, Seychelles. Astove. Specimens were 
also obtained at Aldabra (Takamaka, Ile Esprit, and Ile Michel). 
3. Chiromachus ochropus C. L. Koch. 
Ischnurus ochropus, C. L. Koch, Die Arachn. iv. p. 69 (1838). 
* Mitt. Zool. Mus. Berlin, iv. p. 402 (1910). 
