3l8 WILLIAM MORTON WHEELER 



The specimens from Easter Island are all workers. I have added the 

 description of the female from a series of females and workers taken by Mr. 

 E. M. Ehrhorn at Honolulu, Hawaii, the type locality. Forel described this 

 form as a variety, but it evidently deserves to rank as a subspecies. 



The typical C. nuda was originally described from Fiji, and has been 

 recently taken there by Dr. W. M. Mann. It is also recorded from India, Cey- 

 lon, Queensland and New Guinea. The subsp. niauritanica Forel occurs in 

 Tunis, Algiers, Cyprus and probably elsewhere along the eastern and southern 

 littoral of the Mediterranean. — Easter Island. 



3. Tetramoriuni guineense Fabr. $. — Probably of African origin, but 

 now spread throughout the tropics of both hemispheres and occasionally com- 

 mon in hot-houses in temperate regions. — Easter Island. 



4. Tetramoriuni simillinium F. Smith. §. — Like the preceding dis- 

 tributed in all parts of the tropics and occurring in hot-houses in Europe and 

 the United States. — Easter Island. 



5. Plagiolepis mactavishi Wheeler. ? ^. — The female (undescribed) 

 measures about 2,5 mm. and is more brownish yellow, more pubescent and 

 much less shining than the worker; the gaster above darker brown with the 

 bases and margins of the segments brownish yellow. Wings whitish with 

 pale yellow veins. Head subrectangular, nearly as broad as long, only very 

 slightly narrowed anteriorly, the posterior border straight, the eyes about half 

 as long as the sides, the antennal scapes extending a distance equal to their 

 greatest diameter beyond the posterior corners of the head. Thorax broader 

 than the head, elliptical, about i ^/2 times as long as broad, the large meso- 

 notum very flat, scarcely longer than broad; epinotum short, convex, without 

 distinct base and declivity. Wings long, finely pubescent. 



The workers agree perfectly with the types from Moorea, Society Islands 

 and specimens from Honolulu (Ehrhorn) and Takao, Formosa (Sauter) in my 

 collection. This form is evidently very close to and perhaps merely a variety of 

 P. alluaudi Emery, originally described from the Seychelles. — Easter Island. 



6. Prenolepis (Nylanderia) obscura Mayr. subsp. vaga Forel. §. — 

 A single specimen. The Type of the species was originally described from 

 Sydney, New South Wales, where it was taken by the »Novara» Expedition. 

 It is recorded also from Java and Hawaii. The subsp vaga and bismatrkensis 

 Forel were originally described from the Bismarck Archipelago, and the latter 

 has been recently taken by Dr. W. M. Mann in the Salomon Islands. A paler 

 form of the species occurs in New Guinea. — Juan Fernandez: Masatierra. 



7. Prenolepis (Nylanderia) bourbonica Forel subsp. skottsbergi subsp. 

 nov. 



Worker. Darker than any of the described forms of the species, the 

 body being black or very dark brown, the mandibles, antennal scapes and 

 legs brown, the tarsi, knees and trochanters yellow. The head is rectangular 

 and as broad in front as behind, as in the subsp. hawaiiensis Forel, but dis- 

 tinctly smaller. The surface of the body is distinctly more shining than in 

 the typical form or the subsp. bengalensis Forel, and the blunt hairs on the 

 head, thorax and gaster are deep black and longer and coarser than in the 



