Camponotus maccooki

Distribution
Western United States. Oregan, Washington, California.

Distribution based on Regional Taxon Lists
Nearctic Region: United States. Neotropical Region: Mexico.

Nomenclature

 *  maccooki. Camponotus sylvaticus r. maccooki Forel, 1879a: 69 (w.q.m.) MEXICO. Wheeler, W.M. 1910d: 306 (s.). Combination in C. (Myrmoturba): Wheeler, 1917a: 560; in C. (Camponotus): Emery, 1925b: 75; in C. (Tanaemyrmex): Creighton, 1950a: 377. Subspecies of rubripes: Forel, 1886f: 143. Raised to species: Dalla Torre, 1893: 241. Subspecies of maculatus: Emery, 1893i: 672; of sansabeanus: Emery, 1920b: 232 (footnote). Revived status as species: Creighton, 1950a: 377; Snelling, R.R. 1970: 396.

Worker
Wheeler (1910) – Major Length, 10-13 ,mm.; head, 3.2 x 3 mm.; scape, 2.7 mm.; hind tibia, 3.6 mm.

In structure closely resembling Camponotus vicinus, but the antennal scapes are more thickened at their tips, and their bases are not only flattened but dilated to form a small but distinct, rounded lobe on the outer side. Mandibles 5- to 6-toothed. Base and declivity of epinotum subequal. Middle and hind tibim elliptical in cross-section, not sulcate.

Sculpture of body as in the var. nitidiventris (unavailable name), the sides of the head covered with punctures or small foveolae as in that form.

Pilosity as in vicinus, but pubescence much less developed, being as short and inconspicuous as in nitidiventris. There are no hairs on the cheeks. Middle and hind tibiae with bristly flexor surfaces.

Head, cheeks, clypeus, mandibles and antennae deep reddish brown or ferruginous; front and vertex black, mouthparts yellowish. Thorax, legs, petiole and gaster sordid light brown or brownish yellow, the gaster usually more or less dark brown at the tip and often transversely banded with fuscous on the more anterior segments, rarely black throughout.

Minor Length, 6-8 mm.

Resembling the worker major in sculpture, pilosity and color, but the head is more shining. The lobular dilation at the base of the antennal scape is small but perceptible.

Queen
Wheeler (1910) – Length, 12-14 mm.

Resembling the female of nitidiventris in sculpture and pilosity; color like that of the major worker, but the mesonotum, scutellum and metanotum are dark brown, the pronotum more or less infuscated. In some specimens the whole gaster is brownish yellow and lighter than the pleurae and legs; in others it is dark brown at the tip and obscurely transversely banded with brown more anteriorly. Wings suffused with brownish yellow; veins yellow, stigma brownish.

Male
Wheeler (1910) – Length, 9 mm.

Very similar to the male of vicinus and its varieties. The antennal scapes are flattened, dilated and lobulate at the base.