FORMICA. PSEUDOLASIUS. 337 



triangular, slightly biconvex, very broad and transverse above, the 

 lateral angles rounded ; abdomen depressed, broad, as broad as 

 long. 



Formica Sdiiguinca, ^ . a. Head ; b. Maxillary palpus. 



5 . Very similar to the ^ but larger, the head, thorax and 

 abdomen a lighter brighter yellow, tlie abdomen slightlv darker, 

 in greater contrast to the colour of the head and thorax. 



Lenr/th, ^ 6-7; 5 0-9'5 mm. 



Hab. Lahoul, frontier of Tibet (Sar/e). Northern Europe, Asia 

 and America. 



I have seen no c? of tliis species from India. 



Genus PSEUDOLASIUS. 



Formica, pt,, Smith, Jour. Linn. Soc. v (18G1), p. GS, 5 . 

 Pseudolaaius, Emery, A?m. Mtis. Cio. Oen. xxiv (1886), p. 244. 



Type, P. familiaris, Smith, originally described from the Celebes. 

 Range. Indo-Malayan region. 



^ maj. Mandibles powerful, subtriangular, armed with four 

 teeth, the innermost broad, bimucronate, the others acute ; clypeus 

 more than twice as broad as high, convex in the middle, depressed 

 at the sides, its anterior margin transverse ; frontal area not clearly 

 defined, clypeal and antennal hollows confluent ; antennal carinas 

 wide apart, rather short, parallel ; antenna? 12-jointed, somewhat 

 short, the scape stout, the fiageilum gradually thickened to the 

 apex ; eyes small, ocelli absent ; head massive, square, deeply 

 emarginate posteriorly. Thorax short, stout, not so broad as 

 the head, the pronotum rounded, convex ; viewed from above 

 the jnesonotum is circular, the metanotum obliquely truncate, the 

 basal portion much shorter than the oblique apical portion ; 

 thoracic sutures distinct ; legs moderately long and stout. Node 

 of the pedicel quadrangular, slightly emarginate above, posteriorly 

 fitting into a hollow in the abdomen ; abdomen short, broad and 

 convex, somewhat gibbous in front. 



^ min. Much smaller, very similar ; mandibles with the masti- 

 catory margin more oblique; clypeus convex, anteriorly transverse ; 

 clypeal and antennal hollows not so clearly confluent as in the 



VOL. II. Z 



