COLLECTED AT BACHIAK, KAISAA, ETC. 113 



quadrate, with the posterior angles rounded, deeply eraarginate behind : 

 a longitudinal channel runs from the emargination to the base of the 

 clypeus, and in it, exactly opposite the eyes, is a single ocellus ; the 

 head longitudinally striated anteriorly, not extending beyond the 

 ocellus ; the hinder portion of the vertex is transversely striated, in 

 front of which the head is delicately aciculate ; mandibles very stout, 

 black at their margins, and armed with two stout teeth at their apex. 

 Thorax transversely irregularly striated and rugose ; the scutellum 

 prominent ; the metathorax with two acute spines. Abdomen ovate ; 

 the apical half of the segments dark fusco-ferrugi^ous. 



Hab. Bachian. 



Workers 4 lines long, apparently of this species, differ from the larger 

 form in wanting the ocellus. 



Gen. SoLENOPSis, Westw. 



1. Solenopsis cephalotes, Smith, Proc. Linn. Soc. iii. 149 (workers, major 

 and minor). 



All the sexes of this species were taken by Mr. "Wallace from an under- 

 ground nest. The large workers have the head enormously developed, 

 and subquadrate ; their mandibles short, very stout, and curved, and 

 their inner edge is perfectly smooth, without teeth ; the small workers 

 have the head much smaller in proportion, being only a little wider 

 than the abdomen ; their mandibles have a row of acute teeth. The 

 female is of a pale ferruginous colour, with the head of the ordinary 

 size, the mandibles toothed, the wings colourless. Thorax oblong- 

 ovate J the abdomen oblong-ovate, with the apical half fuscous. The 

 club of the flagellum in this genus is composed of two joints; the 

 flagellum of the male tapering to a point. 



Hab. Bachian. 



This species, Mr. Wallace remarks, has a fiery sting. 



Subfam. CRYPTOCEEID^, Smith. 

 Gen. EcHiNOPLA, SmitJi. 



1. EcHiNOPLA PR^TEXTA. E. nigra; capite, thorace, et abdomiue 

 punctatis ; thorace oblongo, subquadrato ; pedunculo transverso ; 

 mandibulis, antennis, pedibusque ferrugineis. 



Worker. Length 21 lines. Black ; the head and abdomen shining, not 

 so strongly punctured as the thorax, which is subopake, and has a 

 short, pale downy pubescence ; the head is also slightly pubescent on 

 the vertex. The legs, antennae, and mandibles ferruginous, the latter 

 stout, and armed on their inner edge with acute teeth ; the antennae 

 longer than the thorax ; the scape two-thirds of the length of the fla- 

 gellum, which is very slightly thickened towards the apex, the tip 

 acute. The thorax oblong-quadrate, and as wide as the head ; the 

 divisions between the pro-, meso-, and metathorax not discernible 



