54 hymenoptera. 



191. Formica pallide-fulva. 



Formica pallide-fulva, Latr. Hist. Nat. Fourm. 174 § . 

 Hah. United States. 



192. Formica mellea. B.M. 

 Formica mellea, Say, Bost, Journ. Nat. Hist, i, 286. 1 3 ■ 

 Hob. Louisiana. 



193. Formica lauta. 



Formica lauta. Say, Bost. Journ. Nat. Hist. i. 286. 2 $ c? . 

 Hab. North America (Indiana). 



194. Formica imparis. 



Formica imparis, Say, Bost. Journ. Nat. Hist. i. 287. 3 $ c? . 

 Hab. North America (Indiana). 



195. Formica Integra. B.M. 



Formica integra, Nyl. Form. Fr. et d' Alger. 62 (note). 



Worker. Length 4.V lines. — Rufo - ferruginous : abdomen 

 black ; closely resembling the F. sanguinea, but th.e clypeus has 

 not the small central notch which characterizes that species. 

 Head large, much wider than the thorax, excavated behind ; the 

 cl\-peus subcarinated in the middle. Thorax naiTowed poste- 

 riorly ; the scale of the peduncle incrassate, its apex obtuse ; 

 head, thorax and abdomen thinly sprinkled with ferruginous 

 hairs. 



Hab. United States. 



The insect described is doubtless the large form of the worker, 

 and probably the same as that to which Dr. Nylander refers in 

 liis note : we have adopted the name which he proposed on that 

 supposition. In the collection of the Museum are specimens from 

 North America, agreeing in every respect with the F. sanguinea 

 of Europe, 



196. Formica esuriens. B.M. 



Worker major. Length 4 lines. — Head, thorax, legs, and scale 

 of the abdomen, ferruginous; abdomen nigro-fuscous. Head 

 very large, much wider than the thorax, deeply excavated be- 

 hind ; the clypeus with a central longitudinal carina, its anterior 

 margin with a broad shallow notch ; the mandibles of a darker 



