Camponotus nigroaeneus

Distribution based on Regional Taxon Lists
Australasian Region: Australia.

Nomenclature

 *  nigroaeneus. Formica nigroaenea Smith, F. 1858b: 40 (s.) AUSTRALIA. Lowne, 1865a: 277 (w.); Wheeler, G.C. & Wheeler, J. 1970: 650 (l.). Combination in Camponotus: Mayr, 1862: 663; in C. (Myrmoturba): Forel, 1914a: 267; in C. (Myrmophyma): Emery, 1925b: 111. Senior synonym of divus: McArthur, 2009: 283.
 * divus. Camponotus nigroaeneus subsp. divus Forel, 1907a: 34 (w.) AUSTRALIA. Combination in C. (Myrmophyma): Emery, 1925b: 111. Junior synonym of nigroaeneus: McArthur, 2009: 283.

Description
Worker. Length 3« lines (= 7 mm). Black, with a green tinge. Head large, wider than the thorax, emarginate behind; the clypeus subcarinate, its anterior margin slightly notched in the middle; mandibles obscurely ferruginous, punctured and strongly dentate within. Thorax short, rounded in front, much narrower behind, terminating almost in a point at the verge of the truncation of the metathorax (= propodeum); the apical joints of the tarsi obscurely rufo-piccous. Abdomen ovate, thinly covered with fine silky pale yellow pubescence; the margins of the segments thinly fringed with pale glittering yellow hairs, a few hairs of the same color sprinkled over the head and thorax; scale subovate, small rounded above.

Hab. Melbourne.

Mayr (1862): In addition to Smith's description: Worker minor. Length 6 mm. Black, almost matte, with a tinge of olive green on the gaster and thorax; on the gaster there are a few long erect hairs, a few more on the on the thorax. Pubescence not very fine flat lying is sparse on the head, denser on the thorax and gaster and very sparse on the legs. The head is finely and densely punctate like a thimble. The thorax is densely and finely striate. The gaster has fine dense transverse striations. Similar to micans the thorax is slightly convex on top and the basal and sloping surfaces of the metanotum (= propodeum) form a very distinct angle with one another. Von Herrn Prof. Schenck Neuholland Sammlung. Lowne (1865): The small workers appear not to have been hitherto described. They are 2 lines (= 4 mm) long, black, with a green tinge. Head as wide as the thorax, elongated, and rounded behind. Clypeus neither carinated nor notched, thinly covered with golden hairs. In other respects the small workers are exactly like the large ones: they are very conspicuous when alive, on account of the bright golden pubescence which covers the abdomen; I know nothing of their habits, except that I have always found them on the ground.