HYMENOPTERA. 1 2/ 



50. MYRMICA CARBONARIA. B.M. 



Worker. Length 1 line. Coal-black, smooth and shining : 

 the antennae and legs dark rufo-fuscous, scarcely black ; the basal 

 joints of the flagellum, the articulations of the legs and the tarsi, 

 pale rufo-testaceous, the claw-joint of the tarsi darkest. Thorax 

 about the same length as the head, with a deep strangulation 

 between the meso- and metathorax, the latter truncate behind, 

 not spined. Abdomen ovate, truncate at the base, pointed at 

 the apex, the nodes elevated and rounded above. 



Female. Length 2 lines. Of the same colour as the worker, 

 differing only in the sexual characteristics of length of thorax 

 and abdomen. 



Male. Length 2 lines. Head and thorax opake black, the 

 legs and abdomen shining ; the clypeus, scutellum, and verge of 

 the truncation of the metathorax, shining ; wings colourless and 

 iridescent, the costal nervure and stigma testaceous; abdomen 

 oblong-ovate ; the nodes of the petiole transverse, their upper 

 margin subemarginate. 



Hab, Madeira. (Coll. T. V. Wollaston, Esq.) 



51. MYRMICA SUBOPACA. B.M. 



Worker. Length 1J line. Head, thorax, legs, and nodes of 

 the petiole, dull rufo-testaceous ; abdomen shining black, varying 

 in depth of colour, small workers being sometimes pale red with 

 the thorax black. The articulations of the legs and the tarsi 

 pale rufo-testaceous, the head before the insertion of the antennae 

 and mandibles pale ferruginous ; the metathorax with a longitu- 

 dinal groove, not spined ; the head and thorax smooth ; the 

 nodes of the petiole elevated, blunt above ; abdomen ovate, trun- 

 cate at the base, pointed at the apex. 



Female. Length 2^ lines. Opake fusco-ferruginous ; abdo- 

 men black, with the base reddish, the articulations of the legs 

 and the tarsi pale rufo-testaceous ; the thorax in the middle in 

 front, and the scutellum, of a brighter red ; the metathorax with 

 a deep excavation ; abdomen oblong-ovate, thinly sprinkled with 

 short pale glittering hairs. 

 Hab. Madeira. (Coll. T. V. Wollaston, Esq.) Cape. 



52. MYRMICA IRRITANS. B.M. 



Worker. Length 1 line. Pale rufo-testaceous : the head, 

 excepting its mandibles and antennae, the abdomen, excepting 

 its base, being more or less rufo-fuscous ; the femora and tibiae 

 in the middle are also darker than the other parts of the legs. 

 Head wider than the thorax or abdomen, very smooth and shining ; 



