128 HYMENOPTERA. 



eyes black and rather prominent. Thorax shining, deeply 

 strangulated in the middle, the metathorax with two short erect 

 acute spines. Abdomen ovate, very smooth and shining, with 

 the base truncated. 



Hab. Port Natal. 



53. MYRMICA LONGICEPS. B.M. 



Worker. Length 2 lines. Dark rufo-piceous : the legs elon- 

 gate and pale rufo-testaceous. Head oblong-ovate, the mandibles 

 large, produced forwards in a line with the sides of the head ; the 

 face striated on each side before the eyes, the clypeus and vertex 

 smooth and shining, the antennae and legs long, slender, and 

 pubescent. Thorax smooth and shining in front, deeply stran- 

 gulated in the middle, the metathorax with two bent acute spines. 

 The nodes of the peduncle and the abdomen, smooth, shining, 

 and thinly sprinkled with long pale erect hairs. 



Hab. Melbourne. 



54. MYRMICA ADELAIDE. B.M. 



Worker. Length 2J- lines. Head, thorax, and nodes of the 

 abdomen bright red ; abdomen black, legs dark rufo-piceous. 

 Head and thorax coarsely longitudinally striated, the striae 

 strongly punctured ; the teeth of the mandibles black, the club 

 of the antennae 3-jointed, the flagellum 10-jointed. The femora 

 incrassate in the middle, very slender at their base and apex, the 

 articulations of the legs and the tarsi pale rufo-testaceous ; the 

 metathorax not spined. Abdomen ovate, covered with a very 

 fine silky pile, and with a large ovate cream-coloured spot on 

 each side at the base. 



Hab. Adelaide. 



Of this very conspicuous and beautiful species I have only seen 

 the single specimen described : in the form of the thorax it differs 

 from the majority of species, being somewhat flattened above, 

 the margins raised and crenulated, the anterior margin rounded 

 in the middle and curving on each side, forming a lateral, sharp, 

 angular tooth ; the division between the meso- and metathorax 

 is very distinctly impressed. 



55. MYRMICA FORMOSA. 



Worker. Length 3 lines. Black : the mandibles, antennae, 

 thorax, legs, and first node of the petiole, blood-red, the man- 

 dibles palest, and the scape and apex of the flagellum above, more 

 or less fuscous. The head longitudinally striated, the prothorax 

 with very coarse striae diverging on each side from the centre ; the 



