Vot. II, Pr. II] WHEELER—COCOS ISLAND ANTS 305 
Subfamily CAMPONOTINAZ 
5. Prenolepis vividula guatemalensis cocoénsis Forel. 
Prenolepis guatemalensis Forel var. cocoénsis Forel, Ann. 
Soc. Ent. Belg. 46, 1902, p. 178 8. 
This variety is very close to the var. itinerans Forel, the 
worker being “‘of the same form and stature, but the color isa 
little duller, the legs, especially the tibize are brownish, the sur- 
face is more opaque, and the hairs are a little longer and more 
abundant than in itimerans or the typical guatemalensis. The 
epinotum is also a little more elevated and more gibbous than in 
the type of itimerans, with deeper mesoeépinotal suture. The 
legs and hairs are dark-colored, strikingly contrasting with the 
yellowish body.” 
Thirteen workers taken by Dr. Williams agree with Forel’s 
description, except that the legs are concolorous with the body. 
Three females from the same colony are of the same color as 
the workers but distinctly paler than females of itinerans from 
the Galapagos Islands and have the head smaller, with much 
more rounded occipital corners and the hairs on the thorax 
shorter and less abundant. The specimens of cocoénsis were 
taken by Dr. ‘Williams in rotten logs. Forel’s name ‘cocoénsis’ 
should probably be amended to read “cocosensis”. 
6. Camponotus (Myrmobrachys) biolleyi Forel 
Camponotus biolleyi Forel, Ann. Soc. Ent. Belg. 46, 1902, p. 
WA 7) Sia: 
Camponotus (Myrmobrachys) biolleyi Forel, Rev. Suisse 
Zool 22, 1914. p.270: 
Forel’s description and four worker cotypes in my collection 
show that this species is very closely related to C. lindigi Mayr 
of Central and South America. Two minor workers taken by 
Dr. Williams agree perfectly with the cotypes. Biolley found 
the species nesting in dead branches and abundant on the ferns 
which form the undergrowth on Cocos Island. 
7. Camponotus (Myrmamblys) cocosensis, new species 
Worker major. Length 6.5—7 mm. 
Head large, subrectangular, about 1.2 times as long as 
broad, a little narrower in front than behind, with straight sides 
