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 i^rincipally 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. 2/. f. 19. 

 Oliv. Encycl. Meth. 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 



