548 bulletin: museum of comparative zoology. 



twice as long as broad. Pronotum large; mesonotura very distinctly 

 concave and saddle-shaped in profile, with an obtuse projection in front 

 resembling the pommel of a saddle and a feeble posterior thickening 

 formed mainly by the two projecting spiracles. Epinotum rather 

 broad, with strongly convex basal surface, rising behind the mesono- 

 tum and a little longer than the declivity into which it passes insen- 

 sibly. Petiole vertical, thick, much thicker than in F. nasuta, as thick 

 above as at the base, convex in front, flat behind, with obtuse, rounded 

 border, entire and rather transverse when seen from behind. Legs 

 very slender. 



Mandibles striatopunctate, rather shining. Body very shining; 

 gaster nearly smooth, other portions of the body very feebly sha- 

 greened, a little more strongly and densely on the front of the head. 



Front of clypeus with a row of long hairs ; remainder of body gla- 

 brous, except for one or two small hairs on the head and towards the 

 tip of the gaster. Mentum with ammochaetae. Tibiae with one, 

 metatarsi with two rows of bristles on their flexor surfaces. Pubes- 

 cence very short and very sparse on the appendages, almost nil on the 

 body. 



Black, scarcely tinged with brown. Mandibles, anterior border of 

 head, antennae, legs, palpi, and the very narrow posterior border of 

 each gastric segment brownish red; coxae and femora darker brown. 



Biskra, Algeria (A. Forel). 



This ant is remarkably like the species of Cataglyphis, especially 

 in the structure of the thorax, petiole, and maxillary palpi and in 

 possessing ammochaetae on the mentum. According to Forel, its 

 colonies are very small and inhabit Httle nests the entrances of which 

 do not open on craters but are very small round holes in the sand,, 

 difficult to discover unless one follows up workers that are returning to 

 the nest. 



Subgenus NEOFORMICA, subgen. nov. 



132. F. (N.) PALLIDEFULVA PALLIDEFULVA Latrcillc. 



F. pallidefulva Latreille, Hist. nat. fourm. 1802, p. 174, ^ ; Dalla Torre, Cata- 

 log. Hymen., 1893, 7, p. 203; Emery, Zool. jahrb. Syst., 1893, 7, p. 656, 

 taf. 22, fig. 16, S 9 &; Ibid., 1895, 8, p. 335; Wheeler, Bull. Amer. 

 mus. nat. hist., 1904, 20, p. 369. 



Worker. Length 4.5-6 mm. 



Body long and slender. Mandibles 8-toothed. Head, excluding 

 the mandibles, about ly times as long as broad, but little narrower 



