1935] 
Australian Ant Genus Mayriella 
157 
Head, thorax and pedicel yellowish-brown or testaceous ; 
mandibles, antennae, gaster and legs, including the coxae, 
paler, clearer yellow; mandibular teeth brown. 
Redescribed from a single cotype specimen from Mackay, 
Queensland (Gilbert Turner). As previously suggested, 
Viehmeyer’s M. overbecki from Trial Bay, New South 
Wales, seems to me to be synonymous with the typical form 
of abstinens. The female, which he described very briefly, 
appears to be very similar to the corresponding caste of 
the following subspecies. 
Mayriella abstinens hackeri subsp. nov. 
(Fig. 1, d-e) 
Worker. Of the same size and otherwise very similar 
to the typical abstinens , but the promesonotum is slightly 
narrower and the teeth on the epinotum are distinctly 
larger, as long as broad and acute, the petiole somewhat 
shorter, with the anterior slope of the node concave instead 
of straight in profile, so that it forms a sharper angle with 
the convex posterior slope. 
Head, thorax and petiole more shining and the sculpture 
of the head and promesonotum distinctly finer, the super- 
imposed rugulosity more delicate, less distinctly longitu- 
dinal on the front, with the round foveolse shallower though 
more numerous on the head. Postpetiolar node not smooth 
as in the typical abstinens but like the node of the petiole 
very finely and densely punctulate. 
Long, sparse pilosity on the body as in the type, but the 
hairs on the antennae and legs distinctly shorter, sparser 
and appressed. 
Color as in the type but the most mature specimens have 
the gaster concolorous with the head, thorax and pedicel. 
Female. Length about 2.7 mm. 
Differing from the worker in the following characters: 
Head fully as broad as long or slightly broader ; eyes larger, 
more than twice as long as broad, with about eight facets 
in their greatest transverse diameter. Mesonotum as broad 
as long, narrowed and bluntly pointed anteriorly ; scutellum 
semicircular, flattened; base of epinotum scarcely longer 
than the declivity, the teeth stouter. Posterior slope of 
