1965] 
Taylor — Pristomyrmex 
47 
A weak negative allometric relationship between spine development 
and body size is evidenced ; this is best marked in the bicolored form, 
probably because of its better representation in the study series. 
Female (previously undescribed). Six female specimens are avail- 
able for study; one self-colored, five bicolored. 
1. Self-colored form. A single dealate labeled Point Lookout — 
Grafton, N.S.W., has the following dimensions: HL 1.05 mm; HW 
1.07 mm; Cl 102; SL 0.98 mm; SI 88; Scutum W 0.68 mm; WL 
1.20 mm; Propodeal Spine L 0.22 mm; Petiole L 0.35 mm; Post- 
petiole Height 0.39 mm; Eye Diameter 0.22 mm; Ocular Index 21. 
General features as in Figures 9 and 10. Pronotum with a partly 
broken fine, arched transverse carina, its humeri each with a low 
obtuse tubercle. Parapsidal lines of mesoscutum very obscure, es- 
sentially vestigial. Bases of propodeal spines connected by a transverse 
carina. Metapleural spines slightly longer and more acute than 
propodeal ones. 
Color and pilosity as in worker, the ocelli each with an adjacent 
small dark brown spot, the mesosomal suture lines and axillary 
sclerites infuscated dark brown. 
2. Bicolored for?n. Two dealate specimens from Mt. D’Aguilar 
Range, one each from Stradbroke Island and Tamborine Mt., and 
an alate from Binna Burra, have the following dimensions: HL 
0.95-1.22 mm; HW 0.99-1.30 mm; Cl 102-106; SL 0.94-1.18 mm; 
SI 91-95; Scutum W 0.62-0.85 mm; WL 1.10-1.42 mm; Petiole L 
0.32-0.46 mm; Postpetiole Height 0.32-0.43 mm; Eye Diameter 
0.19-0.26 mm; Ocular Index 19-20. The smallest specimen is from 
Mt. D’Aguilar Range, the largest is the Binna Burra alate (which 
has a forewing length of 1.9 mm, hindwing length of 1.3 mm). 
Distribution of indices in the series implies negative allometry of scape 
length and head length, relative to head width. Pronotal spine 
development variable, apparently negatively allometric, smallest 
specimen with a low obtuse tubercle, largest one with an almost 
imperceptible slightly raised convexity. Propodeal spines similarly 
variable, best developed in smallest individuals (about comparable to 
self-colored specimen), represented only by slightly raised propodeal 
corners in largest specimen. Characters otherwise as in self-colored 
form, with the scapes proportionately slightly longer. 
Coloration as in worker, ocellar area darkly infuscated; pronotum 
and scutum reddish brown in the Binna Burra alate, which may be 
incompletely colored. 
Ecology. All detailed records of quadridentatus show that nests 
are usually located in rotting logs, a fact confirmed in the field by 
