34 MR. F. SMITH ON SOME NEW SPECIES OF ANTS 
species would have been found to form a new genus, intermediate between 
Formica and Myrmica. Future observation and research will probably 
supply the materials for deciding this interesting question. 
Gen. Taprnoma, Foerst. 
TAPINOMA ERRATICA. T. nigro-fusca, nitida, glabra ; pedum articulis 
tarsisque pallidis; squama oblonga depressa. 
Formica erratica, Latr. Hist. Nat. Fourm. p. 182.—Tapinoma erratica, 
Smith, Brit. Fourm. p. 111. 1. 
The collection contained a single example of this species. Its coming 
from so distant a locality created a doubt of the possibility of its bemg 
identical with the species found in this country and throughout Europe ; 
but after the most attentive examination having been given to it, I acknow- 
ledge my inability to detect the slightest difference between them. 
Fam. MYRMICID A. 
Gen. Myrmuica, Latr. 
Myrmica sucunpaA. M. fusco-nigra, nitida; mandibulis antennis 
pedibusque articulis et tarsis rufo-pallescentibus. 
Worker. Length 13 line. Brownish black, very smooth and shining ; 
the mandibles, anterior portion of the head, the antenne, tarsi, and 
articulation of the legs pale testaceous; the eyes small and placed 
midway at the sides of the head. Thorax narrowed posteriorly, with 
the division between the meso- and metathorax strongly impressed 3 
the metathorax with two very minute spines ; the first node of the 
abdomen, when viewed sideways, is wedge-shaped, the second globose. 
Abdomen subovate, widest towards the apex. 
MyRMICA GRACILLIMA. M. rufo- pallida, levis, nitida; abdomine nitido 
nigro. 
Worker, Length 13 line. Pale rufous, smooth and shining; the head 
oblong, rather wider than the abdomen; the mandibles stout and 
armed with four black acute teeth on their inner margin; the eyes 
small, ovate, and placed in the middle at the sides of the head; club 
of the antenne 3-jointed; the antenne as long as the head and 
thorax. Thorax compressed, the division between the meso- and 
metathorax strongly impressed ; the metathorax unarmed. Abdomen 
ovate, black, smooth and shining; the nodes of the peduncle pale 
rufous, the first elevated above the second; when viewed sideways, 
wedgeshaped, with the apex blunt, the second globose. 
There is a certain similarity in the habit of this small ant that induces 
me to think it quite possible that it may be only a very diminutive form of 
the worker of Atta barbara. 
Myrmica punica. WM. rufo-pallida; capite longitudinaliter delica- 
tule striato; metathorace parvo, acuto, dentiformi. 
