wheeler: ants of the genus opisthopsis. 349 



restricted. The epinotal angle seems to be somewhat more acute in 

 profile than in the typical form. 



Female (dealated). Length 10 mm. 



Head a little longer than broad, with straight, anteriorly converging 

 sides and slightly convex posterior border. Eyes proportionally 

 smaller than in the worker. Ocelli small. Thorax elongate elliptical, 

 a little narrower through the wing-insertions than the head through 

 the eyes. Epinotum in profile with very short, convex base and long, 

 abruptly sloping declivity, concave below. Petiolar border feebly 

 emarginate in the middle. Gaster large, broadly elliptical, somewhat 

 flattened dorsoventrally. 



Pilosity and sculpture as in the worker. 



Black; apical half of mandibles, antennal scapes, wing-insertions, 

 and tarsi dark brown; tibiae and apical fourth of femora brownish 

 red. Eyes black. 



Male. Length nearly 5 mm. 



Slender; head through the eyes as broad as long; eyes large, con- 

 vex, nearly circular, as long as the cheeks, which are straight and 

 converge anteriorly. Mandibles small, edentate, with acute tips. 

 Clypeus convex, carinate. Antennae slender; scapes as long as the 

 basal seven joints of the funiculus; first funicular joint as long as the 

 second but broader, remaining joints subequal, more than twice as 

 long as broad. Thorax not broader than the head through the eyes; 

 mesonotum as long as broad, convex in front and overarching the 

 pronotum. Epinotum with subequal base and declivity, the former 

 convex, the latter straight and vertical in profile. Petiole cuneate 

 in profile, with concave posterior surface, its superior margin sharp 

 and distinctly and rather broadly notched in the middle. Gaster 

 slender, elongate elliptical, with small genital appendages. Legs 

 slender. Wings without a discal cell. 



Sculpture as in the worker. 



Hairs short, delicate, pale, more abundant than in the worker and 

 as numerous on the thorax as on the gaster. 



Black; knees, tips of tibiae, and tarsi piceous. Wings yellowish 

 hyaline, with pale yellow veins and pterostigma. Eyes dark brown. 



Queensland: Townsville, type-locality (F. P. Dodd); Cairns 

 (Wheeler). 



Described from one female, one male, and four workers taken by 

 F. P. Dodd and belonging to the Museum of South iVustralia. The 

 workers of this series agree perfectly with numerous specimens taken 

 by myself at Cairns, running on tree-trunks with the typical respiciens. 



