60 HYMENOPTERA. 



into their nests, and are also borne off by them when their 

 nest is disturbed ; this, I think, conclusively determines their 

 being advantageous inmates in some way or other, and pro- 

 bably all of them in the same way as Claviger has been ob- 

 served to be by P. W. J. Miiller, who, in ^' Germar's 

 Magazin der Entomologie," states that he observed the ants 

 imbibing a secretion emitted by Claviger from orifices 

 situated at the sides of the abdomen where the little tufts of 

 hair are observable ; the ants, Miiller informs us, nourish 

 the Claviger with honey extracted from flowers, I have 

 repeatedly found Claviger testaceus in nests of Formica 

 Jlava, most abundantly so in the month of April, at which 

 time I have also noticed in the same nests quantities of ob- 

 long black eggs. After several failures, I at length suc- 

 ceeded in breeding from these a species of A^jhis, with 

 mottled wings ; the specific name I was unable to ascertain. 

 I succeeded in rearing this Aphis by covering the bottom of 

 a small tin box with mould pressed down, upon which I 

 placed the eggs and covered them with damp moss; by 

 placing this in the sun for warmth, taking care never to 

 allow it to become dry, I succeeded in rearing the Aphis. 



The species of 31yrmica, new to the British list, which 

 I have now to add to our Fauna, is M. Kollari, the Tetra- 

 Tnorium Kollari of Mayr. Dr. Roger, in his Catalogue of 

 Genera and Species of Ants, published in the " Berlin. Ent. 

 Zeitschrift'' (1863), reduces Dr. Mayr's species to a sy- 

 nonym of the Formica guineensis of Fabricius, of course an 

 African insect ; at the same time he also reduces a species 

 which I described, from Panama, under the name Myrmica 

 reticulata. I know nothing of Fabricius's insect, but think 

 it highly improbable that a species common in Austria 

 should be the same as that from Guinea ; but I am quite 

 satisfied that the Panama species is distinct, although very 



