NOTES ON HYMENOPTERA. 129 



and I have taken it in Kentish Town ; the worker had 

 not been discovered in England until September last, when 

 Mr. Sharp found a nest at Micklehara. An exquisite figure 

 of the male will be found in the sixth volume of Curtis's 

 British Entomology, and one of the female illustrates a paper 

 by the same author, in the twenty-first volume of the Lin- 

 nean Transactions ; the following is a careful description of 

 the worker : — 



Length 1:|. Black; the mandibles, clypeus, sides of the 

 face before the eyes, the antennae, the truncation of the me- 

 tathorax, the peduncle beneath, the apex of the abdomen 

 and the legs, reddish-yellow ; the body thinly sprinkled over 

 with erect bristly pale hairs ; the abdomen very smooth and 

 shining. The mandibles toothed on their inner edge, and 

 striated at their base ; the clypeus with its anterior margin 

 deeply emarginate, forming a tooth at each angle of the 

 emargination ; the antenna elbowed at their base ; the head 

 is longitudinally wrinkled above, or rugose. The scape 

 nearly as long as the head ; the fiagellum clavate ; the club 

 consisting of three joints, the apical joint longer than the 

 two preceding, and acuminate at the apex, it is also much 

 thickened in the middle. The thorax irregularly, longitu- 

 dinally and deeply wrinkled, or striated; the metathorax 

 armed with two short, stout and acute horizontal spines ; the 

 truncation of the metathorax is smooth and somewhat con- 

 cave ; the peduncle coarsely rugose. The abdomen is widest 

 beyond the middle. 



The worker of 3Iyrmicina m^ost closely resembles that of 

 Tetramurium aespitum; the resemblance is only general, 

 because in no minutise do they agree, but it might be over- 

 looked by any person not intimately conversant with the 

 specific diff'erences of the two insects. 



1866. k 



