Polyrhachis delicata

Crawley, W. C., 1921, New and little-known species of ants from various localities., Annals and Magazine of Natural History 7, pp. 87-97: 96-97

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Polyrhachis delicata


Polyrhachis delicata  HNS 

, Crawley, Ann. & Mag. Nat. Hist. (8) xv. 1915, p. 238.

[[queen]] (hitherto undescribed). Length 8.0 mm. Dark reddish brown; mandibles, anterior half of clypeus, frontal area, and space between the bases of antennae red; remainder of head blackish brown; centre of scutum, the scutellum, and bases of segments of gaster brown, the rest of thorax red; apical six joints and the apices of the remaining joints of funiculus reddish yellow; the rest brown, also the scape with the exception of the apex and base. Nervures and stigma brownish yellow.

Head and thorax as in [[worker]] with sexual differences. Spines of epinotum and scale somewhat shorter and blunter.

Dull, gaster shining. Sculpture somewhat coarser than in [[worker]], assuming on the dorsum of thorax a tendency to run in a longitudinal direction.

A few hairs on head, thorax, and gaster, as in [[worker]]. A thin grey pubescence on gaster.

[[male]] (hitherto undescribed). Length 5.5 mm.

Uniform dark castaneous brown; mandibles, clypeus, antennae, and legs yellow.

Eyes very prominent, occupying one-half the sides of head. First joint of funiculus somewhat gibbous. Scale low, broad, and rounded in profile. Body with a fine superficial ground-sculpture.

Darwin, Northern Territory, Australia (Hill).

Types in the British Museum.

After comparison with a cotype, which the author kindly sent me, there is no doubt that the insect described by me in 1915 as P. delicata  HNS  is none other than Emery's species. Mr. Hill found a nest of these ants, which is made of a fragile carton between two leaves fastened together. The whole nest is not more than 4 inches square and about 3/4 inch in the deepest part.