352 bulletin: museum of comparative zoology. 



5. Opisthopsis pictus var. palliatus, var. nov. 

 Plate 3, fig. 28. 



Worker. Differing from the typical jridvs in color, the black of the 

 thorax being restricted to the lowermost portions of the meso- and 

 epinotum. Some specimens have the prosterna black. The black 

 of the femora does not extend beyond their basal third or half. The 

 petiolar scale is only slightly infuscated at the superior border. The 

 first two gastric segments are orange-yellow, only a little paler than 

 the thoracic dorsum and there is a large brown spot on each side of the 

 second segment. Eyes pearl-gray. 



Queensland: Sunnybank, near Brisbane, type-locality (Wheeler); 

 Mungar Junction (A. M. Lea). 



This variety is distinctly transitional to 0. rvfithorax Emery. 



6. Opisthopsis pictus var. lepidus, var. nov. 

 Plate 1, fig. 3, 4. 



IVorker. Differing from the preceding forms in the color of the 

 thorax. Only the pronotum and dorsal portion of the mesonotum are 

 orange-yellow, the remainder black. Even the lower border of the 

 pronotum is black in some specimens. Legs and gaster as in the 

 typical pictus, though some specimens have the posterior portion of 

 the second segment black or the yellow reduced to a large bilobed spot 

 at the anterior border of the segment. First funicular joint as black 

 as the succeeding joints. Eyes pearl-gray. The epinotal angle is 

 very sharp in many specimens and the concavity of the declivity even 

 more abrupt than in the figure 3. 



Queensland: Towns ville, type-locality, Kuranda, Koah, and 

 Sunnybank, near Brisbane (Wheeler); Mackay (Turner). 



7. Opisthopsis pictus var. bimaculatus, var. nov. 



Worker. Length 5 mm. 



Larger and more robust than the preceding forms, with the sides of 

 the head distinctly more convex. The orange-yellow color is still 

 further restricted on the thorax and confined to the dorsal portion of 

 the pronotum. Petiole entirely black. Only the dorsal portion of 

 the first gastric'segment and two large, sharply defined, elliptical spots 



