40 



FOHMICIDAKÎIM JAPONICARUM SPKCIKS NOV.^. 

 VEL MINUS COdNIT.^ 



auctore Prof. Tokiilnro llo, Tokii» 

 S\ilofa,xn.il3r 3Vt"2'£l3V^IOIlSr.2E I ep. 



Strumigenys iaponica sp. nov. 



$ 2 1/2 mill. long. 



Mandibles less than 1,3 the length ot llie liead, triaiigular, the 

 shaft thickened at the middle, curved inward, and armed with 

 inany sharp teeth. Head large, subcordale, narcowed anteriorly, 

 suoiit-like, niLich thickened posteriorly; sides rather' sti'aight; 

 vertex very convex; posterior angles rounded, with a marginal 

 line ; posterior rnargin deeply concave. Clypeus large, convex, 

 nearly subcarinate, subrhombic, gradually tapering anteriorly. 

 Eyes small, situated laterally a little behind the middle of the head. 

 Antenn.ip slender, the scapes long but not reaching the posterior 

 corner of tlie iiead ; funicuius 1 1/2 longer than the scapes, fiini 

 ciilar joints 1-3 short, fourth joint longer than the second and third 

 joints taken together, terminal joints two times longer than the 

 fourth, and torming a r-atlier thin club. Frontal carina^ long; 

 antennal grooves latéral^ long, reaching the posterior angles of the 

 head. Thorax very thin, iiarrower than the posterior part of the 

 head, forming dorsal ridges ou both sides; pronotum longer and 

 broader than mesonotum, the anterior part being slender, curved, 

 and sliortly pedunculate, forming a neck, but the middle part being 

 rounded on both sides; in profile pronotum and mesonotum being 

 siightly convex, meso-epinotal constriction slightly impressed ; 

 epinotum high, the basai surface slightly ascending posteriorly, 

 with 2 spines at the posterior angles, the declivity being l'ather 

 abrupt and concave. p]pinotal spines shorter than the basai surface, 

 without membrane or spongy substance, straight, acute, directed 

 upward and a little backward. Pétiole longer than the epinotum, 

 the anterior half becoming a peduncle, while the posterior part 

 being formed into a node, which in profile being high and rounded, 

 and slightly convex at the posterior declivity. Postpetiole shorter 

 than the pétiole; node in profile being thickened dorsally. Gaster 

 longer than the pedicel but a little shorter and thicker than the 

 head, ovoid, very convex ventrally, acute at the extremity. Legs 

 moderately long, slender. 



