wheeler: ants of the genus formica. 451 



Male. Length 7.7 mm. 



(After Forel). Differs from all the known species, except F. san- 

 guinea in its mandibles armed with 5-6 teeth, which are even more 

 distinct than in the male sanguinca. The basal half of the mandibles 

 is, moreover, very narrow, but the terminal half is enlarged. Clypeus 

 carinate, with perfectly entire anterior border, thus distinguishing 

 the species from saiiguinea. Head very short, more than H times as 

 broad as long, with very large eyes, occupying f of its sides. Petiole 

 with its superior border notched in the middle. In other respects 

 like F. sanguinea. The same is true of the thorax. Wings shorter 

 than in F. sanguinea, not surpassing the gaster and hyaline through- 

 out, with brownish veins and stigma. Color, sculpture, and pilosity 

 in other particulars as in F. sanguinea but the legs are brown, the pilos- 

 ity is sparser (almost absent except on the lower surface of the gaster), 

 and the sculpture and pubescence are a little finer. 



Oasis Satsch-zou in the desert of Gobi (Roborovsky and Kozlov). 



The affinities of this species, which is known from only a single 

 male specimen, are not at all clear. Forel evidently believed it to be 

 related to F. sanguinea, whereas Emery places it near uralcnsis. Its 

 exact position cannot be determined till the worker and female have 

 been discovered. 



43. F. foreliana, sp. nov. 



Worker. Length 4-6 mm. 



Mandibles 8-toothed. Head, excluding the mandibles, a little 

 longer than broad, a little narrower in front than behind, with straight 

 posterior and feebly convex lateral borders. Clypeus strongly 

 carinate throughout its length, with broadly rounded, projecting 

 anterior border. Frontal carinae very slightly diverging behind, 

 nearly parallel. Antennae long and slender, joints 2-4 of the funi- 

 culus longer and more slender than joints 8-10. Maxillary palpi 

 very long, decidedly longer than in any of the preceding species of the 

 rufa group. Thorax rather long, the pro- and mesonotum not very 

 convex, the mesoepinotal constriction rather shallow, the epinotum 

 with subequal base and declivity, both straight in profile and meeting 

 at a pronounced angle. Petiole rather narrow, cuneate in profile, 

 with feebly convex anterior and more flattened posterior surface, blunt 

 lateral and rather sharp, rounded, superior margin which is either 

 entire or very feebly notched in the middle. Legs moderately long 

 and slender. 



Body including frontal area opaque, very finely shagreened; man- 

 dibles somewhat coarsely striatopunctate. 



Hairs golden yellow, long, slender, erect, sparse; present only on 



