wheeler: AUSTRALIAN ANTS. 53 



keep in close touch with one another by means of their antennae, after 

 the manner of the DoryHnae. They stung severely for such small 

 insects. 



The worker of 0. mjobergi is readily distinguished from that of 

 hedleyi by its paler color, shorter head, antennal scapes and funicular 

 joints, the straight dorsal profile of the thorax, broader epinotum and 

 petiole, deeper constriction between the postpetiole and gaster, and 

 smooth, shining, and sparsely punctate mandibles. 



Onychomyrmex doddi, sp. nov. 

 Plate 2, fig. 3-5. 



Worker. Length: 2-2.5 mm. 



Head subrectangular, about \ longer than broad, scarcely broader 

 in front than behind, with nearly straight lateral and posterior borders 

 and rounded posterior corners. Clypeus with broadly arcuate, finely 

 denticulate anterior border, sinuate on the sides. Eyes very similar 

 to those of the preceding species, situated about | the distance from 

 the anterior to the posterior border of the head. Mandibles with the 

 long terminal tooth less abruptly bent inward, remaining teeth rather 

 small. Antennal scapes | as long as the head; first and terminal 

 funicular joints fully twice as long as broad, remaining joints scarcely 

 longer than broad. Thorax rather stout, shaped much as in mjobergi, 

 with straight, horizontal dorsal outline, the pronotum longer than 

 broad, rising rather abruptly from the neck, but posteriorly flattened 

 above, its sides only feebly convex. Mesonotum somewhat more 

 than twice as broad as long. Thoracic sutures very distinct. Epino- 

 tum in profile with the base feebly and evenly convex and longer than 

 the declivity which is sloping and distinctly concave. Petiole in 

 profile with a short basal peduncle and prominent, compressed, 

 somewhat translucent ventral projection; the node with subequal 

 anterior and dorsal surfaces, both feebly convex; seen from above as 

 long as broad, subrectangular, with rounded sides and straight, 

 subequal anterior and posterior borders. Postpetiole as long as broad, 

 very convex below and separated by a pronounced constriction from 

 the gaster. Legs as in mjobergi. 



Smooth and shining, covered with small piligerous punctures, which 

 are most abundant on the head and especially on the cheeks. Mandi- 

 bles, clypeus, and cheeks opaque, the mandibles finely and sharply 



