310 FORMIOID^. 



Genus (ECOPHYLLA. 



Formica, pt, Fabr. Syst. Eiif.. 1775, p. 392, ^ . 

 (Ecophylla, Smith, Jour. Linn. Soc. v (18(51), p. 101, ^ $. 



Type, CE. virescens, Fabr., from Australia. 



Baiujc. PalcTarctic, Ethiopian, Indo-Malayan, and Australian 

 regions. 



^ . Head of ^ maj. and of ^ min. relatively of the same size, 

 roundly quadrangular without the mandibles, posteriorly trans- 

 verse, not emarginate, and slightly broader than in front ; 

 .nandibles long, with the masticatory margin very broad in pro- 

 portion to length, dentate, the apical tooth acute and curved ; 

 palpi very short, maxillary with 5, labial with 4 joints ; clypeus 

 strongly convex, about two-thirds as higli as broad below, its 

 anterior margin strongly arched ; frontal area small, triangular ; 

 antennal carinse short, comparatively wide apart, parallel ; antennae 

 12-jointed, filiform, their origin remote from the posterior margin 

 of the clypeus ; eyes large, prominent ; ocelli absent. Thorax 

 elongate ; pronotum convex, anteriorly narrowed into a collar ; 



Fig. 93.~ (Ecophylla S7naraadi)ia, ^. a. Head frnm front. 



mesonotum constricted, narrow, viewed sideways saddle-shaped as 

 in Myrmecocystys ; metanotum rounded above, gibbous ; thoracic 

 sutures distinct ; legs long and slender. Pedicel elongate, incras- 

 sate in the middle, scarcely nodiform ; abdomen short, oval. 



5 . Resembles the ^ , but the head is very broad and trans- 

 verse posteriorly ; the thorax proportionately shorter and uiore 

 massive, the pronotum vertical and overhung by the remarkably 

 broad and gibbous mesonotum ; scutellum also broad and gibbous, 

 compressed ; postscutellum and median segment roundly sloped 

 posteriorly ; legs shorter aud relatively stouter ; wings broad and 

 am])le, with a marginal and one cubital cell. Pedicel relatively 

 shorter, \\'\t\\ a broad subquadrate node very thick at base and 

 thin along the upper margin, which is broadly emarginate 

 abdomen oval, very broad and massive. 



(S . Head relatively very small ; the mandibles narrow, porrect, 

 very hairy, and with an indistinct dentate mnsticatory margin : 



