1935] 
Australian Ant Genus Mayriella 
159 
petiole and postpetiole, the superimposed reticulate rugulo- 
sity and the foveolation of the head and promesonotum. 
The rugules are longitudinal only on the anterior expanded 
portions of the frontal carinse; the foveolse are abundant 
and regularly distributed on the head and anterior half of 
the promesonotum, its posterior half being thimble-punc- 
tured like the epinotum; the nodes of the petiole and post- 
petiole are more strongly punctulate than in the typical 
abstinens and its subsp. hackeri though more shining 
than the basal portions of their respective segments. 
Pilosity as in the typical abstinens . 
Head, thorax and pedicel much darker, being dark brown 
and contrasting sharply with the clear yellow coloration 
of the mandibles, antennae, legs and gaster. 
Described from a single specimen taken by Mr. A. M. 
Lea “in rotting leaves” on Mt. Tambourine, Queensland. 
Mayriella spinosior sp. nov. 
(Fig. 1, f-g) 
Worker. Length 1.3 mm. 
Of the same size as abstinens but differing in the fol- 
lowing structural characters : Head broader, fully as broad 
as long, more rectangular, with somewhat more angular 
posterior corners, less sinuate posterior border and more 
widely separated frontal carinse. Median elevated plate 
of clypeus shorter, with less developed teeth and more semi- 
circularly excised anterior border. Sides of promesonotum 
less distinctly submarginate, humoral angles less acute, 
mesoepinotal groove shallower and the epinotal teeth re- 
placed by spines which are fully twice as long as their 
basal diameter, nearly as long as the base of the epinotum 
and directed upward and outward and somewhat back- 
ward. Petiole as long as high, its node in profile truncated 
above owing to what corresponds to the posterior slope in 
abstinens being angulate in the middle. The anterior bor- 
der of this truncated area, which is subtrapezoidal and 
slightly broader behind than in front, is sharply margin- 
ate. Postpetiole from above of similar shape but reversed, 
that is, broader in front than behind, with the anterior 
corners distinctly produced and bluntly subdentiform. An- 
terior corners of gaster not marginate. 
