116 Mr. Smith's Essay on the Genera and 



the mandibles, and the antennae, rufo-testaceous ; the scape stout, 

 of nearly equal thickness the entire length, and bent at the base, 

 the curvature produced in front into a sharp angle; the bead and 

 thorax above, rugose-striate; the spines which arm the meta- 

 thorax long, stout, and acute at their apex; the nodes of the ab- 

 domen coarsely rugose ; the wings hyaline, faintly coloured towards 

 their base ; the nervures and base of the stigma rufo-testaceous. 

 Abdomen subovate, smooth and shining, dark fusco-ferruginous, 

 the base and apex pale ferruginous, thinly sprinkled over with 

 shining yellow hairs. 



Worker. — Length 1 g — 2 lines. The sculpture as in the female ; 

 the ocelli obsolete, the general colouring usually paler, particularly 

 the head and thorax ; the head perhaps scarcely so deeply striated ; 

 the scape is bent and angulated in the same manner as in the fe- 

 male ; the thorax is more compressed at the sides, being narrower 

 towards the metathorax than in the female; the nodes as in that 

 sex, the legs rather more slender; the abdomen proportionably 

 smaller. 



Male. — Deep nigro-fuscous ; the apical joints of the flagellum, 

 the tubercle at base of the scape, the mandibles, the apex of the 

 femora and the tarsi, pale rufo-testaceous ; the mandibles usu- 

 ally pale yellow ; the scape short and stout, about one-fifth 

 of the entire length of the antennae ; the antennae and legs thinly 

 sprinkled with pale glittering hairs; the wings smoky towards 

 their base. Abdomen smooth and shining, pale testaceous at the 

 apex, the nodes shining above, the anterior one has a shining 

 depression behind ; the metathorax is deeply notched and pro- 

 duced into an angulated process on each side, the scutellum and 

 sides of the metathorax striated; the entire insect sprinkled with 

 pale glittering hairs. 



This is a very abundant species : it is found in all parts of the 

 kingdom, and is frequently met with, occupying one side of the 

 same hillock in which Formica Jlava has formed its habitation ; it 

 is met with in great profusion in hilly districts, forming its subter- 

 ranean channels under stones; in the nest of this insect I met with 

 a specimen of Batrisus formicarius, in Yorkshire. 



Sp. 2. Myriiiica ruginodis. 



Fcem'tna. — Testaceo-ferruginea, sparse flavido-pilosa, capite supra, 

 abdominis dorso medio, scutello et macula ventrali plus minus- 

 ve fuscescentibus ; scapo ad basin arcuatim flexo ; capite, tho- 

 raceque longitudinaliter striatim-rugosis ; metathoracis spinis 



