266 



rOliMICIDjE. 



Ranrje. Temperate regions of both hemispheres, and high eleva- 

 tions in the tropical or subtropical zones. 



5 . Head more or less oval, but always with a distinct posterior 

 margin ; mandibles broad, IIk- masticatory margin dentate; maxil- 

 lary palpi 6-, labial palpi 4-jointcd ; clypeus strongly convex in 

 tbe middle, posteriorly produced between the bases of the antennse, 

 obtusely angular and well-defined ; antennal carin^e short, wide 

 a]iart ; 'antenna; 12-jointed, the club of the flagellum moderately 

 distinct, formed by the apical 3, 4 or 5 joints ; frontal area tri- 

 angular, depressed. Thorax anteriorly rounded, convex, posteriorly 



Y\a, 81. Mijrmica ritgosa, ^ . n. Head ; b. Tibia with pectinate spur. 



more or less rounded from one side to the other ; pro-mesonotal 

 suture obsolete, meso-metauotal suture more or less distinct, the 

 thorax often slightly emarginate at that point; metauotum (in all 

 Indian species) armed at the posterior lateral angles with two long 

 curved acute spines ; legs moderately long and stout. Pedicel : 

 the 1st node petiolate anteriorly, in front more or less truncate 

 above, posteriorly rounded to the apex by a gradual curve; 

 2nd node globose or subglobose, transverse, sometimes as long 

 as broad or even longer ; abdomen oval. 



2 . Head, pedicel and legs as in the ^ . Metanotum generally 

 with two teeth or two obtuse tubercles. Wings with one cubital 

 cell half divided bv an incomplete nervure, and one discoidal 

 cell. 



S . The mandibles as in the ^ , dentate. Head smaller ; eyes 

 very large, ocelli prominent ; antennae 13-jointed, the scape and 

 the slightly thickened apical 5 joints of the flagellum, forming the 

 club, subequal ; thorax massive, the mesonotum raised above the 

 pronotum and slightly gibbous with converging grooves ; meta- 

 notum much longer than in the $ , \a ith the posterior lateral 

 angles of the slightly sloping basal portion rather prominent, 

 the apical portion obliquely truncate and slightly concave ; pedicel 

 much as in the ^ ; abdomen narrower and smaller than in the $ . 

 Wings as in the $ , but the division of the cubital cell more 

 developed, though still not quite complete. 



