LASius. 339 



Indian species more or less medially vertically carinate), its 

 anterior margin rounded, posterior margin distinct ; frontal area 

 not distinctly limited, about twice as broad as high ; antennal 

 cariute short, wide apart, parallel and vertical ; antenna) 12-jointed, 

 originating close to the hinder margin of the clypeus ; eyes of 

 moderate size ; ocelli present, but not distinct, very small. 

 Thorax : the pronotum rather short, strongly rounded, the meso- 

 notum broad, convex ; metanotum short, the basal level portion 

 about half the length of the obliquely sloping flat apical portion ; 

 the pro-mesonotal suture very distinct ; the thorax at the nieso- 

 metanotal suture deeply emarginate ; legs somewhat short and 

 stout, claws simple. Pedicel with a small quadrangular, more or 

 less laminate node ; abdomen massive, broadly oval, not produced 

 in front or overhanging the pedicel. 



5 . Head and pedicel as in the ^ ; ocelli larger and more 

 distinct. Thorax very massive, the pronotum short, vertical, not 

 forming part of the dorsum ; mesonotum very large, convex ; 

 scutellum broad, somewhat flat ; metanotum short, rounded 

 posteriorly ; abdomen large, oval. 



" cf . Mandibles broad, the masticatory margin acute, with 

 only one apical tooth, or the whole masticatory margin dentate. 

 Antennae 13-jointed, the flagellum flliform, the joints nearly equal 

 in length, the 1st joint thicker than the others. Antennal carinae 

 short, diverging posteriorly. Genitalia very small on the under 

 side of the abdomen, covered by the tectiform dorsum of the apical 

 abdominal segments. The exterior genital plates narrowing to- 

 wards the apex, twice as long as at the base, broad, and the 

 rounded apical plate crescentic. Ventral plate not emarginate." 

 i^Mayr.) 



Ken ^" '^'^ Species. 



xt,. Front of the head with a medial, longitudinal, 

 impressed line or furrow. 

 a' . Joints 2-10 of the flagellum of the 



antenni* longer than they are broad. ... L. himalmjanm, p. 340 

 h' . .Joints 2-10 of the flagellum of the an- 

 tennae as broad as they are long, or [p. :J40. 



broader .^ L. alimo-hrunnem, 



b. Front of the head with a medial, longitudinal 



delicate carina i. aUeito-flamts, p. 3-11. 



•c. Front of the head without any medial longi- 

 tudinal furrow or carina. 

 «'. Of comparatively large size. Length 

 4-5'5 mm. Dark castaneous brown to 



jet-black L. fiilit/i/iosifti, p. 34 1 . 



I/. Smaller. Length 2'6-'-i'-'> mm. Light 



reddish brown " . . L. alumiis, p. 342. 



388. Lasius Crinitus, iSmith (Formica), C'«;!. vi(l8r>8),p. L3, 2; Fore 

 Jour. Bomb. N. H. Soc. viii (1S94), p. 405, 2- 



2 ■ Ochraceous clay-colour all ovei*, finely and closely reticulate- 



z2 



