LASIUS. 341 



smaller, paler insect, and very much more densely pubescent ; the 

 pubescence longish, very distinct on the head and abdomen. Head 

 without the mandibles nearly square, not much broader posteriorly 

 than in front; mandibles subtriangular, the apical tooth long, 

 curved and acute; clypeus less distinctly carinate, and antennae 

 proportionately shorter than in L. himaldyanus. Thorax narrower 

 than in L. himalayanus, and the basal portion of the metanotum 

 rounded, not flat above. Xode of the pedicel and abdomen as in 

 the above species. 



Length^ 23 mm. 



Hob. N.W. Himalayas, 6000-9000 feet. 



It is just possible that this species is the V of L. crinitus, 

 Smith. 



391. Lasius alieno-flavus (Ford, MS.), n. sp. 



$ . Head, including the mandibles, reddish yellow ; antennae, 

 thorax, legs and abdomen paler dull yellow ; head, thorax and 

 abdomen covered with dense fine silky white pubescence, giving 

 the insect a slightly silvery look. Head quadrangular, slightly 

 longer than broad, the cheeks straight, occiput transverse ; man- 

 dibles subtriangular, the masticatory margin oblique, acutely 

 dentate, the apical tooth long and curved ; clypeus proportionately 

 large, convex, very distinctly carinate ; antennae short, the scape 

 not reaching beyond the top of the head, the joints 2-10 of the 

 tiagelluin as broad as long. Thorax somewhat narrow, basal 

 portion of the metanotum very short, rounded above. Node of 

 the pedicel broader proportionately than in L. Jiimalayanus ; 

 abdomen not so large or massive. 



$ . Much larger, dark brown, pruinose ; shape of head, man- 

 dibles and antennae as in the ; front of the head between the 

 antennae delicately longitudinally carinate as in the g 5 clypeus 

 broad, convex, not carinate, transverse anteriorly. Thorax and 

 abdomen large and remarkably massive ; node of the pedicel 

 broad, emarginate above. Wings wanting. 



Length, Q 2'5-3 ; $ 6-5 mm. 



Hob. Himalayas, above 8000 feet. 



Specimens in Mr. Wroughton's collection have been named as 

 above, I believe, by Dr. Forel, but I do not know of any published 

 description. 



392. Lasius fuliginosus, Latr. (Formica), Ess. Hist. Fourm. France, 



1798, p. 36, rf. 



$ . Dark chestnut-red to black, the mandibles, antennae and 

 legs yellowish brown. Head, thorax and abdomen very smooth 

 and shining, devoid of pubescence, but with very short and very 

 sparsely scattered erect hairs. Head subtriangular, very convex 

 in front, much broader posteriorly than in front, the occiput 

 slightly but distinctly emarginate ; mandibles short, powerful, 

 masticatory margin oblique, minutely dentate; clypeus higher 



