356 bulletin: museum of comparative zoology. 



10. Opisthopsis haddoni subsp. RUFONiGER Forel. 



Plate 2, fig. 17. 



Opisthopsis haddoni race rvfoniger Forel, Rev. Suisse zool., 1910, 18, 

 p. 70, g . 



Worker. Length 3-7 mm. 



Differing from the worker of the typical haddoni in the more acutely 

 angular epinotum, in having the superior border of the petiolar scale 

 feebly emarginate in the middle, in the color of the gaster, which is 

 entirely black, and of the antennal funiculi, the basal third or half of 

 which is brownish or yellowish. Eyes pearl-gray, brown or black. 



Female (dealated). Length 8 mm. 



Differing from the female haddoni in having the entire gaster black 

 and the base of the funiculus brown, but the metanotum and scutellum 

 are orange-yellow, the latter with brown spots. Eyes pearl-gray. 



Male. Length 3 mm. 



Smaller than the male of haddoni and with the body dark brown 

 instead of black (possibly due to immaturity or prolonged immersion 

 in alcohol). The head seems to be shorter, the wings are more opaque. 

 Eyes pale brown. 



Central Australia: Tennant's Creek, type-locality (J. F. Field). 



Redescribed from numerous workers, a single female and three 

 males belonging to the cotype series and loaned me by the Museum 

 of South Australia. 



11. Opisthopsis lienosus, sp. nov. 



Plate 2, fig. 9, 10. 



Worker. Length 4-5 mm. 



Closely related to haddoni. Sides of head feebly convex, rather 

 strongly converging in front, posterior border straight or very feebly 

 convex. Eyes moderately large. Mandibles 5-toothed, with convex 

 external borders. Clypeus distinctly carinate. Thorax with rather 

 sharp mesoepinotal angle and the promesonotal and mesoepinotal 

 sutures slightly but distinctly impressed. Petiolar scale thin, its 

 upper border rounded, straight in the middle and in some specimens 

 feebly impressed. Gaster and legs of the usual structure. 



More shining than haddoni, very finely shagreened, upper surface 

 of head with a silky luster. Mandibles shining, sparsely punctate. 



