130 Mr. Smith's Essay on the Genera and 



it in my British list, but Dr. Nylander presented me with the 

 insect which is considered on the continent to be Latreille's J^. 

 tuberum: M. simillima differs in being much more deeply sculp- 

 tured on the head, thorax and nodes of the abdomen, but it agrees 

 in the essential and most characteristic specific distinction pointed 

 out by Latreille, " le corcelet est court, conique, tronqiie, comprime 

 insensiblement sur les cotes, aux le dos continu." For the sake 

 of uniformity of opinion, however, I adopt with pleasure the views 

 of Dr. Nylander, and other eminent Hymenopterists. 



Sp. 13. MyrmicaQ) Icevigata, sp. nov. 



Operaria. — Rufo-testacea, la;vis, tota nitidissima nuda; mandi- 

 bulis, antennis, pedum articulationibus tarsisque pallescentibus ; 

 nodo primo angusto ; metathoracis spinis minutissimis. 



Worker. — Rufo-testaceous ; the mandibles, antennae, joints of the 

 legs, and the tarsi, pale testaceous ; head highly polished, smooth 

 and shining ; antennae 12-jointed, the scape as long as the head, 

 the flagellum of about the same length : the scape most slender at 

 its base ; the three apical joints of the flagellum elongate, forming 

 an elongate club, the apex acute ; the three apical joints half the 

 length of the flagellum. Thorax : smooth and shining, forming a 

 sort of neck anteriorly, behind which it is dilated and rounded at 

 the sides ; above convex, smooth and shining ; beyond the dilata- 

 tion it is elongate, the sides being parallel, the apex of the meta- 

 thorax truncate and delicately reticulated, the spines very minute ; 

 the nodes smooth and shining, the first petiolated ; the second 

 widest and globose; abdomen ovate, smooth, and shining; the legs 

 elongate. 



I captured this insect some years ago at Battersea ; it differs so 

 materially in form from the rest of the genus, that it is placed here 

 with some hesitation and a suspicion that it may prove to be the 

 female of Stenamma, but having only the single specimen described, 

 I am unable to examine the parts of the mouth as satisfactorily as 

 I could wish and leave it to be determined by some pore fortun-te 

 student of this interesting group. 



Sp. 14. Myrmica domestica, 



Fcemina. — Pallide testacea, thoracis macula antica, scutello abdo- 

 mineque fusco-nigris, basi solum pallido ; clava flagelli triarticu- 

 lata, metathorace mutico. 



