98 William Morton Wheeler 



Erect hairs very few and widely scattered on the body, short 

 and more numerous on the gaster; tibiae and tarsi with a row of 

 slanting bristles on their flexor surfaces. Gaster, scapes and legs covered 

 with short, dilute pubescence. 



Color ferruginous red. 



Described from ten specimens. Three of these, K 4305 (type), 

 and K 5590, are in the Klebs Coll. K 4305 is very transparent amber 

 but is in such a position that parts of the head cannot be seen. The 

 block K 5590 contains two workers which are curled up and much 

 obscured by white films. One of them, however, shows the dorsal 

 surface of the head very clearly. The 7 remaining specimens are in 

 the Geolog. Inst. Koenigsberg Coll. (XXB 264, B 19509, B 19413. 

 XXB 4358, B 19036 and two without numbers). Several of these 

 are either in unfavorable positions or more or less clouded but they 

 can be nevertheless definitely assigned to this species. 



I have deemed it necessary to establish a new genus for this 

 ant, because the shape of the head and thorax, and the absence of 

 spurs on the middle and hind tibiae remove it from any of the des- 

 cribed Dolichoderine genera. The absence of these spurs and the 

 abbreviation of the palpi show that it is a highly specialized form 

 which became extinct without leaving any descendants to come down 

 to recent times. 



Tribe Pityomyrmecini, trib. nov. 

 Genus JPityomyrmex, gen. nov. 

 Worker. Body slender, with very long legs and antennae. 

 Head about as long as broad, nearly as broad in front as behind, 

 with straight sides and rounded convex posterior border. Clypeus 

 large, with broadly rounded, entire anterior border. Eyes rather large 

 and convex, apparently behind the middle of the sides of the head. 

 Ocelli absent. Mandibles inserted far apart at the anterior corners of 

 the head, triangular but very long and slender, their blades fully 

 4 times as long as broad. The external and apical borders are rather 

 straight except at the tip, where both are slightly curved, the apical, 

 which is separated from the basal border by a sharp angle, is furnished 

 with numerous subequal denticles. Maxillary palpi long, 6-jointed. 

 Antennae probably 12-jointed, the funiculus but slightly enlarged at 

 the tip, consisting of joints much longer than broad and without 

 a differentiated club. Thorax long and narrow, somewhat resembling 

 that of Paraneuretus ; the pro-, meso- and epinotum seen from above 

 subequal, the pro- and epinotum both convex, especially the latter, 



