142 
Psyche 
[December 
miles due west of the Panama Canal, and about 670 miles southwest 
of the nearest part of the Mexican coast. Most of the island is 
barely 10 feet high, but it rises to about 70 feet at one point. The 
vegetation consists of grasses, shrubs, and wild tobacco and there are 
several coconut groves. 
The island is now uninhabited but it was occupied by a Mexican 
garrison from 1879-1917, and by about 100 phosphate miners from 
1906-1917. Both of these groups received regular supplies from 
Mexico. Clipperton was occupied by the United States Navy during 
the Second World War. 
The ants listed below were collected for the Museum of 
Comparative Zoology by A. M. Peterson and C. F. Harbinson 
during August 1958; the collection is almost certainly fully 
representative. 
Odontomachus insularis (Guerin) 
This species is widespread in Central America and the West 
Indies, and ranges north to Florida and Georgia. It also occurs on 
Cocos Island and the Tres Marias Islands in the Eastern Pacific. 
It is noteworthy that the Island of Clarion in the Revillagigedo group 
is occupied by a second species, O. clara Roger {—haematoda 
clarionensis Wheeler), which is widespread in Mexico and the West 
Indies. A third far ranging species, O. bciuri Emery (= haematoda 
div. auct.; nec haematoda L. ?), occurs on the Galapagos. All of 
these exclusively New World species are to be distinguished from 
the closely similar Indo-Australian O. simillimus Fr. Smith, 
(=haematoda div. auct.; nec haematoda L.), which ranges eastwards 
only to Tahiti. Three series collected. 
Tetramorium simillirnum (Fr. Smith) 
Like T. guineense this is a pantropical tramp species of African 
origin, widespread both in Central America and Polynesia. Its total 
range closely approximates that of guineense. Ten series collected. 
Triglyphothrix striatidens (Emery). 
A species of tropical Oriental origin, spread by commerce throughout 
the Pacific, and established in North Africa and Queensland, 
Australia. Seven series collected. 
Like Raoul, Clipperton has a depauperate ant fauna, consisting 
entirely of species which have probably been introduced by man. 
Saint Helena Island 
Saint Helena (S. lat., 15.57, W. long., 5.42) is a small volcanic 
island 47 sq. miles in area, lying in the south Atlantic about i,8oo 
