512 TEEMITIDES. 



Var. y. Head narrower than in var. a, spines of the thorax 

 shorter. 



a. British Guiana. Presented by Sir. R. Schomburgk. 



Var. 8. Smaller : head much narrower, with shorter and black 

 mandibles : spines of the thorax short. 



a, b. Demerara. Presented by Mr. Bowerbank. 



Var.? Head much smaller, with a yellow dot on the disk: 

 mandibles small, concealed beneath the clypeus : antennae as long 

 as two-thirds of the body. 



a. Para. Presented by Reginald Graham, Esq. 



Var. ? Like the last, but smaller : head narrower : spines of the 

 thorax rudimentary. 



a. Rio Janeiro. Presented by J. P. G. Smith, Esq. 



Var. ? Tawny, pubescent : head narrower in front, twice the 

 length and breadth of the thorax : eyes and ocelli none: mandibles 

 black, long, curved, acute, not dentated: palpi long, testaceous: 

 antennae more than half the length of the body, 20-jointed ; tips of 

 the joints whitish ; joints from the second to the fifth short; the 

 rest rather long: spines of the thorax short, obtuse : abdomen sub- 

 fusiform, broader than the thorax and nearly twice its length. 



a. Rio Janeiro. Presented by J. P. G. Smith, Esq. 



Var.? Immature. Testaceous, soft : head short-elliptical, pice- 

 ous on the disk, full twice the breadth of the thorax: antenna? 

 shorter than the head : thorax without spines : fore border of the 

 prothorax with two lobes : abdomen linear, longer than the thorax. 

 Length of the body 2 lines. 



a d. Para. Presented by J. P. G. Smith, Esq. 



T.dirusP Worker? Tawny, sublinear, pubescent, shining, 

 rather flat: head nearly elliptical, broader and shorter than the 

 thorax : ocelli two, one on each side, near the base of the antenna, 

 far from the eye : mandibles mostly black, each armed with two 

 strong teeth : antennae shorter than the head : prothorax, mesotho- 

 rax and metathorax nearly equal in size and shape: abdomen a 



