310 FOBMICIDjE. 



Genus (ECOPHYLLA. 



Formica, pt, Fabr. Syst. Ent. 1775, p. 392, . 

 (Ecophylla, Smith, Jour. Linn. Soc. v (1861), p. 101, ?. 



Type, (E. virescens, Fabr., from Australia. 



Range. Palasarctic, 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 high as broad below, its 

 anterior margin strongly arched ; frontal area small, triangular : 

 antennal carinae 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 smaragdina, a - H ead from front. 



mesonotum constricted, narrow, viewed sideways saddle-shaped as 

 in Myrmecocystus ; metanotum rounded above, gibbous ; thoracic 

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

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



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

 verse posteriorly ; the thorax proportionately shorter and more 

 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 

 ample, with a marginal and one cubital cell. Pedicel relatively 

 shorter, with a broad subquadrate node very thick at base and 

 thin along the upper margin, which is broadly emarginate 

 abdomen oval, very broad and massive. 



cJ . Head relatively very small ; the mandibles narrow, porrect, 

 very hairy, and with an indistinct dentate masticatory margin : 



