382 FORMICIDJE. 



Length, $ 8-9 mm. 



Hub. Burma ; Tenasserim (Pea, Bingliam). 

 A variety with the lateral angles of the node flattened and pro- 

 duced has been separated as var. alatisquamis by Dr. Forel. 



450. Hemioptica aculeata, Mayr (Polyrhachis), Verh. zool.-bot. Ges. 

 Wien, xxviii (1878), p. 657, $ ; Forel (Polyrhachis), Jour. Bomb. 

 N. H. Soc. viii (1893), p. 17, $ . 



. Jet-black, shining, the mandibles finely longitudinally striate, 

 opaque, the extreme bases of the antennae and the femora and tibiae 

 of the legs blood-red ; head, thorax and abdomen covered with fairly 

 plentiful erect pale hairs, the front of the prothorax and sides of 

 the pro-, meso- and metathorax with a fine, very short, sericeous 

 recumbent pubescence. Head from the front nearly square, the 

 sides not very convex, the vertex broad and rounded, the truncation 

 of the eyes posteriorly oblique ; the clypeus convex, tectiform, 

 rounded anteriorly. Thorax strongly arched, narrowed posteriorly, 

 convex on the margined sides, the pro-, meso- and basal portion 

 of the metanotuin each broader than long ; pronotal spines long, 

 acute, directed almost straight forward, basal portion of meta- 

 notum bounded posteriorly by a faint transverse carina, apical 

 portion of metanotum very slightly concave ; legs comparatively 

 stout, tibiae smooth, not spinose. Node of pedicel biconvex, the 

 upper lateral angles surmounted by two acute spines, beneath the 

 base of which on the outside is a short blunt tooth ; abdomen 

 oval, slightly depressed, pointed at apex. 



<j> . Eesembles the , but the pronotal spines are shorter and 

 the pedicel spines are formed into laminate projections bituberculate 

 at apex. 



d 1 . Eyes not truncate. Node of pedicel rounded. 



Length, 6-7 ; $ 7 ; c? 5'5 mm. 



Hub. India, Kanara ( TFroM//faon),Travancore (Ferguson) ; Burma ; 

 Tenasserim (BinyJiam). 



Genus POLYRHACHIS. 



Formica, pt,, Fabr. Syst. Ent. 1775, p. 394. 



Polyrhachis, Swains. |- Shuck. Hist, fy Nat. Arranqt. of Ins., Lardner's 



Cyclop, (p. 172, no desc.) (1840) ; Smith, Jour' Linn. Soc. ii (1858), 



p. 58. 



Type, P. bihamata, Drury, from the Malay Peninsula. 



Range. Both hemispheres. 



$ . Resembles Camponotus ; but there is little or no difference 

 in the size and form of workers. Head more or less orbicular, 

 maxillary palpi 6-, labial palpi 4-jointed, the basal joint of the 

 maxillary palpi about half the length of the 2nd joint. Thorax 

 and node of the pedicel more or less armed with spines or teeth, 

 or with certain points distinctly angular, rarely wholly unarmed. 

 Abdomen short, the basal segment generally covering more than 

 half of the total length of the abdomen. 



