815 



slightly compressed epinotum descends with a rounded slope, 

 lacking a distinct base and declivity. Petiole small and nar- 

 row, in profile cuneate, with convex ventral and anterior and 

 flat posterior surface; apical border rather sharp, bluntly 

 pointed when seen from behind. Gaster broadly elliptical. 

 Legs rather slender, hind tibiae cylindrical. 



Smooth and shining ; mandibles sparsely and not very 

 coarsely punctate : remainder of body finely shagreened ; 

 cheeks and gaster sparsely punctate. Hairs yellow, erect, 

 sparse on the body and along the flexor surfaces of the femora 

 and at their tips. Hind tibiae with several rows of bristles 

 on their flexor surfaces. Pubscence very fine and dense, 

 visible only on the sides of the thorax and on the appendages. 

 Chestnut-red ; antennal scapes blackish ; gaster black, with 

 yellowish margins to the segments. Legs yellowish-brown. 



A single specimen from Todmorden. 



I am unable to refer this ant to any of the Australian 

 species described by previous writers. The thorax feebly 

 approaches that of C . ( Myrmosphincta) intre'pidus, Kirby, in 

 shape, but the form of the head and clypeus show that it 

 belongs more properly in the subgenus Myrmoi urha . 



23. Camponotus (Myrmogonia) eremicus, n. sp. 

 PI. Ixvi., figs. 5 and 6. 



Worker major. — Length, 7 mm. 



Head trapezoidal, longer than broad, broader behind 

 than in front, with straight, transverse posterior border and 

 feebly convex cheeks. Eyes large, convex, their anterior 

 orbits at the middle of the sides of the head. Mandibles 

 6-toothed, their outer margins straight at the base, strongly 

 convex at the tips. Clypeus strongly carinate, its anterior 

 border not produced or lobed, feebly and sinuately excised in 

 the middle. Frontal area small, triangular, indistinct; 

 frontal groove distinct ; frontal carinae closely approximated 

 anteriorly, curved, and more diverging behind. Antennae 

 slender, scapes reaching about two-fifths of their length beyond 

 the posterior corners of the head. Pronotum as broad as long, 

 flattened above, with a sharp semicircular ridge around its 

 anterior surface, and extending back to the middle of its 

 sides. Promesonotal suture pronounced ; mesoepinotal suture 

 absent, the mesonotum and epinotum together twice as long- 

 as broad, so compressed laterally as to be reduced dorsally to 

 a rather sharp, blade-like edge. In profile the mesoepinotum 

 is as high as long, the dorsal edge feebly and evenly convex 

 and as long as the declivity, which is abrupt and feebly con- 

 cave. Petiole rather narrow, cuneate in profile, thick below, 

 with a distinct ventral protuberance, feebly convex anterior 



