HYMENOPTERA. 79 



This species very closely resembles the 0. hamatodes, but in- 

 dependent of its smaller size, the head is of a different form ; 

 still it may possibly be a small form of that species, if such 

 exist in the colonies of the insects of this genus, a circumstance 

 which does not appear to have been observed. 



7. ODONTOMACHUS? GHILIANII. 



Odontomachus Ghiliariii, Spin. Mem.Accad.Torino, xiii. 71 (1853). 

 Hab. Brazil (Para). 



This is probably a species of Formica, notwithstanding its 

 general resemblance to a species of Odontomachus ; the abdomen 

 and scale of the peduncle are described as being the same as in 

 Formica-, arid no mention being made of the sting, which in 

 Odontomachus is always more or less exserted, renders it highly 

 probable that this is only one of the more remarkable and slender 

 forms of a species of true Formica. 



Species of Cuba. 



8. ODONTOMACHUS INSULARIS. 



Odontomachus insularis, Guer. Icon. Reg. Anim. iii. 423 c? $ . 

 Hab. Cuba. 



.Species of Singapore, Ceylon, Ceram, and the Philippine 

 Islands. (Sp. 9-13.) 



9. ODONTOMACHUS RIXOSUS. B.M. 

 Worker. Length 4-J- lines. Head, antennae and mandibles 



reddish-brown; the sulcations on the face obliquely striated 

 behind, and smooth and shining towards the mouth ; the eleva- 

 tion between the sulcations longitudinally striated, the hinder 

 portion of the head smooth and shining, the central longitudinal 

 impression not very profound. The thorax transversely striated, 

 the prothorax circularly and delicately so, of an obscure reddish- 

 brown; the coxae and femora pale testaceous; the tibiae and 

 tarsi pale ferruginous. Abdomen reddish-brown, very smooth 

 and shining, the base and apex paler ; the node conical, termi- 

 nating above in an acute point, and produced at the base beneath 

 into an obtuse tooth. 

 Hab. Singapore. 



10. ODONTOMACHUS RUGOSUS. 



Worker. Length 3 lines. Rufo-fuscous : the head, thorax, 

 and nodes of the peduncle coarsely, deeply and longitudinally 



