112 Mr. Smith's Essay on the Genera and 



mandibles ferruginous ; ocelli not apparent ; eyes round, the facets 

 of a crystalline brilliancy. Thorax compressed, metathorax very 

 oblique, smooth and shining, the scale small, elongate, inclining 

 forwards, almost decumbent ; legs dark rufo-testaceous, the joints 

 and tarsi pale testaceous; abdomen sub-ovate, produced anteriorly, 

 overhanging and concealing the scale. 



Male. — Length 2 lines. Black, the antennse elongate, reaching 

 to the apical margin of the first segment of the abdomen, the 

 first joint of the flagellum scarcely thicker than the second, all 

 the joints of about equal length, the second and third a little 

 longer than the basal joint ; the ocelli prominent, of a glassy 

 brightness, the clypeus convex, the mandibles produced, very 

 stout, the inner margins straight and serrated, their apex 

 terminated by an acute stout incurved tooth. Thorax elongate, 

 rounded anteriorly, smooth and shining, the metathorax rounded 

 posteriorly, sub-opaque, and having a depression or fossulet in the 

 middle above ; legs dark rufo-testaceous, the joints and tarsi pale 

 testaceous ; wings fusco-hyaline, nervures and stigma fusco-tes- 

 taceous ; scale of the abdomen decumbent, incrassate, rounded at 

 its superior margin, not concealed as in the worker ; abdomen 

 elongate-ovate, margins of the segments narrowly and obscurely 

 testaceous. 



The insect which I have described as the male I think must be 

 correctly assimilated. The worker and male were both captured by 

 J. C. Dale, Esq., in 1816 ; the workers in Scotland, the male at 

 Bournemouth. This is a very interesting addition to our Fauna, 

 quite a new form, approaching somewhat to that of Ponera, through 

 which we pass to the division which have two nodes to the abdo- 

 men, constituting the family Formic'idce ; the habit of F. coUina also 

 approaches to that of our British representative of the group 

 PoncridiS — P. contractu — which is found usually under stones, in 

 which situation Mr. Dale informs me he met with the present 

 species. I have only seen two workers and one male, all captured 

 by and in the collection of Mr. Dale. 



Tainnoma poUta, n. s. 

 Operaria. — Rufo-testacea, antennis filiformibus ; laevis, tota niti- 



dissima, nuda ; antennis, mandibulis, pedum articulis et tarsis 



pallide testaceis. 



Worker. — ^Rufo-testaceous, smooth and shining ; head elongate, 

 the sides slightly curved or rounded, having a few scattered long 

 hairs, slightly emarginate behind ; the scape as long as the head, 



