58 HYMENOPTERA. 



Polyergus rufescens, Mayr. Form. Austr. 112. 1; Ungar. Ameis. 



p. 15. 1. 



Nyl. Form. Fr. et d'Alger. 74. 1. 

 Hab. France; Switzerland; Germany; Austria. 



This is the species whose interesting habits are detailed by 

 Huber, and which is so well known as the Slave-making Ant. 

 Like the F. sanguinea, it plunders the nests of various species, 

 its communities being principally formed of the captives which 

 it enslaves. It has not yet been found in this country, and 

 appears to be rare even in the north of France ; but in the south 

 and also in Switzerland it does not appear to be uncommon. 



Genus 5. POLYRHACHIS. 

 Formica, pt., Fabr. Syst. Ent. 394 (1775). 



Maxillary palpi 6-jointed, elongate ; labial palpi 4-jointed ; 

 mandibles stout, their inner edge denticulate. Ocelli obsolete in 

 the workers. Thorax more or less armed with spines or hooks; 

 scale of the peduncle incrassate, usually spinose, having two, 

 three, or four spines. Wings with one marginal and two sub- 

 marginal cells, the discoidal cells obsolete. Abdomen sub- 

 globose. 



We are indebted to Mr. T. C. Jerdon for the first account of 

 the habits of this genus of Ants ; speaking of the F. nidificans, 

 he says : " This Ant makes a small nest about half an inch, or 

 rather more, in diameter, of some papyraceous material, which 

 it fixes on a leaf. I have opened two, each of which contained 

 one female and eight or ten workers. It is very rare, and I have 

 only seen it in Malabar." Since the publication of these remarks, 

 a nest of one of the species has been received from Malacca ; it 

 was discovered by Mr. Wallace, and exactly agrees with Mr. 

 Jerdon's description. PI. IV. figs. 10, 11. 



Species of India, the Eastern Archipelago, China, and Philippine 

 Islands. Sp. 1-44. 



1. POLYRHACHIS BIHAMATA. PI. IV. fig. 19. B.M. 



Formica bihamata, Drury, Ins. ii. pi. 38. f. 7, 8 . 



Fabr. Syst. Ent. 394. 21-, Ent. Syst. ii.361.49 ; Syst.Piez. 



411. 66. 



Sulz. Gesch. Ins. t. 27. f. 19. 

 Oliv. Encycl. MeU. vi. 499. 

 Latr. Hist. Nat. Fourm. 127. 



Polyrhachis bihamatus, Smith, Proc. Linn. Soc. ii. 59. 

 Hab. India; Sumatra; Borneo. 

 The specimens received from Borneo are much smaller and of 



