366 Mr. W. C. Crawley on 



larlj crenate below ; hind margin of propod without setse 

 except tuft at base of the finger ; setse on anterior margin of 

 uniform size, not serrulate; finger strongly curved, with 

 minute setule. 



Uropods 1 and 2 with rami equal in length to the peduncle 

 and provided with lateral and apical spines, the peduncle of 

 the first uropod bearing a specially stout spine on the upper 

 side at the extremity. Tliird uropod of usual size, with 

 ramus much shorter than peduncle. 



Telson apparently cleft almost to tlie base, margins entire 

 and without setje. 



This species appears to come very close to H. rubra 

 (G. M. Thomson), but until the female is known it is difficult 

 to speak positively about its relationships. 



XLII. — Ants from British Guiana. 

 By W. C. Crawley, B.A. 



The following list consists of ants collected recently in 

 British Guiana by Mr. G. E. Bodkin, who made a number 

 of interesting observations which form a valuable addition 

 to our knowledge of the habits of many of the species. 

 Dr. Forel and Prof. Emery very kindly determined several 

 of the species with which I was unacquainted. 



I. Subfam. PoNEHiN^ (Lepeletier). 



Tribe ECTATOMMINI (Emery) . 



Ectatomma (s. str.) quadridens, F., ^ . 



" A common species about tiie cultivated coast-land areas. 

 The local nickname is ' Kop-Kop.' These ants are invariably 

 found in the cane-fields, where they perform excellent work 

 by carrying off" the larvee of the small Moth Borer {Diatrcea 

 saccharalis) and the Weevil Borer { Spheiiophorus heinipterus, 

 L.). They also destroy the egg-clusters of the small Moth 

 Borer which occur on the leaves of the sugar-cane, and a 

 number of other liarmful insects are killed by them. When 

 captured they emit a squeaking sound. They also frequent 

 the flowers of certain commonly occurring plants, and have 

 been observed to capture insects visiting these flowers to 

 obtain the nectar. Formicary unobserved. Insects as soon 

 as captured are carried off by the ants apparently to the 

 nest." 



Also in Botanic Gardens. 



