Camponotus tumidus

Distribution
This taxon was described from Australia.

Nomenclature

 *  tumidus. Camponotus (Myrmogonia) tumidus Crawley, 1922c: 34, fig. 17 (s.w.) AUSTRALIA. Crawley, 1925b: 595 (q.m.). Combination in C. (Myrmophyma): Emery, 1925b: 112; in C. (Thlipsepinotus): Santschi, 1928e: 483.

Description
Worker major. Length 9.0 mm. Dark brown, barely black; funiculi, cheeks, tibiae, and tarsi russet-brown, rest of legs yellow or light castaneous. Pilosity sparse, none on scapes or upper surface of tibiae; underside of tibiae bears a row of spike-hairs. Head thick, vertex swollen, as long as broad, widest at eyes, which are placed just below the middle of sides; ocelli distinct. Occipital border widely concave. Mandibles thick and short, with six teeth; clypeus bluntly carinate, its anterior third depressed; lobe short, the anterior border crenate. Scapes barely pass the occiput. Frontal carinae short, curved, not diverging behind. Frontal groove reaches the anterior ocellus. Pronotum broader than long, sub-bordered, evenly rounded in front. Mesonotum marked by two transverse impressions. In profile the base of epinotum is very short, the declivity descending abruptly, the first half straight, the lower feebly concave. Scale moderately broad, the top rounded and acute. Moderately shining; mandibles closely punctured. Clypeus with an elongate puncture at each side of lobe. Whole of head with scattered minute punctures. Thorax and gaster almost smooth. There is a reticulate ground-sculpture over the whole body, most noticeable on fore part of head, miscroscopical on gaster. Worker minor. Length 7-7.5 mm. Color as worker major. Head longer than broad, widest at base of mandibles, vertex very arched, sides subparallel, converging slightly behind eyes, which are well behind the middle of sides. Occipital border widely concave, the angles subacute. Mandibles and clypeus as in worker major, but the anterior border of latter distinctly convex. Antennae remarkably long, the scapes passing the occiput by half their length; all joints of funiculus longer than broad. Angle of epinotum more pronounced and declivity more knife-edged, scale thicker and narrower at top, otherwise like worker major. Byford, W.A. (Clark, no. 172). Types W.C.C. coll.

Queen
Crawley (1925) - Length 12.5 mm.

Dark brown, almost black; scapes dark ferruginous, coxae, trochanters, and femora pale castaneous, apical joints of tarsi ferruginous. Wings long, coloured as in the male. There are a few hairs on head, thorax, and gaster, and the tibial have a few bristles beneath.

Head thick, broader than long, broadest behind the eyes, the sides very feebly convex, the occipital border feebly concave. Eyes flat, behind the middle. Scapes extend one-third of their length beyond the occiput. Clypeus and mandibles as in the worker.

Thorax hardly broader than head, upper surface of scutum flat, scutellum not prominent. Scale thin, the top rounded.

Punctuation on head coarser than in the worker.

Male
Crawley (1925) - Length 8-8.5 mm.

Black; funiculi, articulations of legs, and apical joints of tarsi castaneous yellow, borders of gastric segments testaceous. The basal three or four joints of the funiculus are brownish. Wings yellow-brown, nervures brown.

Pilosity scanty and short; there are a few stiff hairs under the tibial.

Mandibles small, edentate, the inner border incised. Clypeus arched, the anterior border rounded. Antennae long, the scapes extending more than half their length beyond the occipital border. Head slightly broader than long, broadest behind eyes, the sides feebly convex, the occipital border widely concave. Eyes of moderate size, placed behind the middle of sides.

Thorax massive, high and arched. Epinotum broad and convex. Node broad and thin, widely emarginate at top.

Stipites long and narrow, volsellae broad and short. Sagittae as long as stipites.

Head matt, finely reticulate. Thorax more shining, more finely reticulate, gaster similar. There are a few irregular punctures on the scutum in front.

Additional References

 * [[Media:Crawley 1922e.pdf|Crawley, W. C. 1922e. New ants from Australia (concluded from vol. ix. p. 449). Ann. Mag. Nat. Hist. 9(10): 16-36 PDF]]