382 Dr. A. Forel, Formicides 
(59a). Sandy bed of Dry River (windward) ; near sea; 
open land. Jan. 2nd. A single worker, found under a 
stone. 
Genre Cryptocerus, Smith. 
Cryptocerus discocephalus v. araneolus, Smith. (No. 20a). 
% minor. 
(20a). A single specimen, obtained in the dry forest 
near Wallilobo (leeward). July. It was beaten from 
foliage at 1000 ft. altitude. 
Genre TretTRAMoRIumM, Mayr. 
1. Tetramorium guineense, Fabr. (No. 2laa21c). 8. 
Espéce cosmopolite des tropiques. 
(21). Not common; found in open places; hill-sides 
below 1000 ft. The formicarium is made at the roots of 
grass, generally at the side of and partly under a stone ; 
it is extensive, and may contain several thousand ants. 
The galleries are half an inch wide, smooth, and extend 
for five or six inches below the surface, with small 
chambers, in which the larve may be found. I have 
only found one form of worker. The ants are rather 
active, but not very pugnacious, even when the whole 
nest is dug up. 
(21a). Fitz-Hugh Valley (leeward), 500 ft. ; open dry 
hill-side. Formicarium at roots of grass, and partly 
under a stone. The colony contained two or three 
thousand individuals. Several females were found in 
the lower chambers. Nov. 4th. 
(216). Petit Bordelle Valley (leeward), 1000 ft. The 
formicarium was a large one, with several thousand 
individuals. I could find no females, though I dug six 
inches below the surface. Formicarium like that de- 
scribed above, at roots of grass, and partly under a stone. 
Nov. 8rd. 
(21¢). Cumberland Valley (leeward). Oct. 10th. Under 
a stone, open hill-side. No formicarium observed. 
2. Tetramorium simillimum, Nyl. (No. 34a et 34D). 
% 2. Cosmopolite dans les tropiques. 
