hymenoptera. 41 



137. Formica procidua. 



Formica procidua, Ericks. Wiegm. Arch. (1842) v. 230, 25!). 

 Hub. Tasmania. 



138. Formica consobrina. B.M. 



Formica consobrina, Erichs. Wiegm. Arch. (1842) v. 258, 228 ^ . 



Hub. Tasmania. 



Erichson described the female only of this species ; the worker 

 diflers considerably in form and slightly in colour. The head 

 and the abdomen, except the basal segment, black, otherwise 

 pale ferruginous; the flagellum is also ferruginous; the head 

 large, wider than the thorax, the latter roimded in front and much 

 compressed posteriorly. 



Species of South America and the IVest Indian Islands. 

 Subdivision 2. 



Wings with one marginal and two sulnnarginal cells, the dis- 

 coidal cells obsolete. The scale of the peduncle usually incras- 

 sate, generally much more so than in the first subdivision, some- 

 times subquadrate, sometimes subuodose ; ocelli usually wantine. 

 (Sp. 139-176.) 



No species belonging to the first subdivision have been received 

 from South America. 



139. Formica 6-guttata. B.M. 



Formica sexguttata, Fabr. Ent. Sijst. ii. 354 5 ; Syst. Piez. 

 401.21. 



Hah. Brazil (Santarem); Island of St. Cruz. 



The insect which appears to be the F. i)-gtitfuta, was captured 

 by Mr. H. W. Bates at Santarem in Brazil; we have seen others 

 from ilifferent parts of South America ; on comparing specimens 

 of both fcmalt's and workers, we are unable to jioint out any spe- 

 cific distinctions between this species and the F. niaculata of 

 Fabricius, the latter being from Africa, and of whicli there is a 

 series of specimens in the Collection of the British ]\Iuseura. 



140. Formica nana. 



Worker. Length 2i lines. — Black : the mandibles and an- 

 tennae ferruginous, the abdomen covered with golden pu1)escence. 

 Head : the anterior margin of the clypeus and the sides of the 

 head anteriorly, ferruginous ; the clypeus with a central longi- 

 tudinal carina, the head thinly covered with golden pubescence. 



