HETEROGYNA — FORMICIDJE. 95 



5.— Antcnnse 9-jointed, scape long, first joint of funicle longer than the two 

 following united, apical joint large, fusiform ; head emarginate poste- 

 riorly ; clypeal and antennal fovese confluent ; clypeus very convex, 

 hood-like, partly hiding the mandihles; frontal carinse short; frontal 

 area triangular ; thorax small, short; metathorax hroader than long; 

 l)etiole of abdomen slender at tip and strongly inclined forward ; wings 

 9 without discoidal cell Bracliyinjrme.v Mayr. 



An ten use 12-joiiited 6. 



6. — Basal joints of the funicle, except the first, shorter than the others ; ocelli 

 indistinct or wanting in ^ ; frontal area superficially impressed, almost 

 twice broader than high 7. 



Basal joints of funicle as long or longer than the others (the last excepted) ; 



ocelli very distinct; frontal area sharply defined... 8. 



7. — Clypeal fovete not confluent with antennal fovea?; scale quadrangular or 

 cuneiform, oblique, directed upwards and forwards ; abdomen tapering 

 to a point, enlarged and strongly convex above at base, touching upper 

 posterior part of scale; ocelli wanting in J Prenolepis Mayr. 



Clypeal fovese confluent with antennal fovese ; scale vertical or nearly so, 

 (juadrangular and straight; abdomen not prolonged anteriorly; ocelli 



very small, indistinct or wanting in ^ liasius Fabr. 



8. — FroTital carinae diverging posteriorly, the external margin slightly convex ; 

 fourth joint of maxillary palpi slightly longer than the fifth ; scale large, 

 vertical ; wings 9 extending beyond apex of abdomen, with one large 

 discoidal cell, rarely wanting Formica Linn. 



Frontal carina nearly parallel, the external margin concave; fourth joint 

 of maxillary palpi almost twice as long as fifth ; petiole with a node or 

 thick scale ; wings 9 with the discoidal cell very small or wanting. 



Myrinecocystus Wesm. 

 9. — Metathorax cubical, the horizontal face nearly flat or slightly convex, the 

 vertical face concave, their point of union forming a crest terminated on 

 each side by a tooth ; clj'peus impressed on middle of anterior margin ; 

 scale thick, cuneiform, strongly inclined foi-wards; wings 9 with two 

 complete submarginal cells Dolichoderus Lund. 



Metathorax not cubical, convex, unarmed, the declivous face flat 10. 



10. —Clypeus with anterior margin entire ; ocelli distinct in both sexes; abdomen 

 not prolonged in front, the petiole with an oval, erect scale, rounded 

 above, where it is often emarginate in 9 ; wings 9 with two submar- 

 ginal cells Ijioniotopiiiii Mayr. 



Clypeus rather deeply notched on middle of anterior margin ; ocelli absent 

 in ^, distinct in 9 ! abdomen enlarged anteriorly, covering the petiole 

 by a prolongation of its basal part, petiole quadrangular, flat, without 

 apparent scale, terminated in front by a transverse thickened edge ; wings 

 9 with but one complete submarginal cell Tapiiioiiia Forst. 



Males. 



Clypeus not prolonged backwards between insertion of antenna' ; tibial s])urs 

 simple; wings with only one submarginal cell, witii or without discoidal 

 cell -2. 



Clypeus extending more or less between insertion of antenuie; tibial spurs pec- 

 tinate ...8. 



