41^ FOKMICIDJE. 



opaque, finely reticulate-punctate ; pubescence very sparse, reduced 

 to a few scattered erect hairs, chiefly on the apical abdominal 

 segments ; the whole insect covered with a very thin, tine, silky 

 pile, visible only in certain lights. Head short, very broad, almost 

 as broad posteriorly as in front ; clypeus with a well-marked medial 

 vertical carina and a distinct anteriorly produced rectangular lobe, 

 the anterior margin of which is transverse and dentate ; antennal 

 carinae widely separate. Thorax broad anteriorly, gradually com- 

 pressed and narrowed towards the metanotum, the sides vertical ; 

 the pronotum and mesonotum each broader than long, the former 

 arched anteriorly ; pro-meso- and meso-metanotal sutures distinct 

 and deeply impressed ; basal portion of metanotum nearly square, 

 the posterior lateral angles broadly turned upwards so as to form 

 stout triangular projections, and making the upper surface of the 

 metanotum concave from right to left ; apical portion of meta- 

 notum nearly vertical, slightly concave ; legs stout, tibiae with 

 extremely minute indistinct spines beneath. Node of pedicel 

 slightly biconvex, armed with four short acute spines nearly equi- 

 distant from one another, the median spines nearly vertical, 

 pointing a little backwards and slightly longer than the lateral, 

 which point obliquely outwards and backwards ; abdomen broadly 

 oval, depressed, the front portion of the basal segment sub- 

 margined. 



$ . Similar to the , but very much larger. Larger in pro- 

 portion than the 2 of any other Polyrhachis known to me. The 

 thorax is not laterally margined as in the ; pronotum short, 

 dentate on each side anteriorly ; mesonotum raised above the pro- 

 notum, convex ; metanotum depressed, the basal portion horizontal, 

 convex, posteriorly deeply emarginate, the posterior lateral angles 

 prominent but rounded ; node of the pedicel armed with four 

 equal teeth. 



Length, g 6'7 : $ 9 mm. 



Hab. Bengal (Itothney); Western India ( Wroityhton) ; Travan- 

 core (Ferguson); Ceylon (Yerbury). 



496. Polyrhachis rastrata, Emery, Ann. Mus. Civ. Gen. xxvii (1889), 

 p. 517, : Ford, Jour. Bomb. N. H. Soc. viii (1893), p. 19, . 



. Close to P. indica (recte clypeata), but distinguished by 

 the regular longitudinal striate sculpture. In the form of the 

 thorax, the armature of the same, the node of the pedicel and 

 the form of the clypeus P. rastrata is similar to P. indica ; but the 

 sculpture of the head and thorax is different, also the punctures 

 run into regular longitudinal striae, close and tine on the head, 

 sparser and deeper on the thorax.'' (Emery.) 



Length, $ 7'5 mm. 



Hab. Tenasserim (Fea). 



Unknown to me. Described by Professor Emery from a solitary 

 specimen. It is apparently very close both to P. clypeata, Mayr, 

 and P. halidayi, Emerv. 



