Polyrhachis cornihumera

The type material was collected from mountain rain forest and bamboo forest.

Identification
Xu (2000) - Close to Polyrhachis levior, but shoulders of pronotum formed a pair of right angles; propodeum with minute teeth; Petiolar node with a pair of long slender lateral spines, without median teeth; body surface densely and finely punctured, relatively dull; legs black.

Distribution based on Regional Taxon Lists
Palaearctic Region: China.

Nomenclature

 *  cornihumera. Polyrhachis (Cyrtomyrma) cornihumera Xu, 2002b: 523, figs. 1-4 (w.) CHINA.

Worker
Holotype. TL 5.9, HL 1.80, HW 1.85, CI 103, SL 1.85, SI 100, PW 1.40, AL 2.00, ED 0.45, MTL 2.45. Paratypes. TL 5.9- 6.1, HL 1.75- 1.85, HW 1.85-1.95, CI 105- 106, SL 1.85 -1.90, SI 97-100, PW 1.40-1.55, AL 1.85- 2.10, ED 0.45-0.50, MTL 2.35-2.55 (2 measured).

Head slightly broader than long, roughly triangular, narrowed forward. Occipital margin weakly convex. occipital corners rounded. Lateral sides of head evenly convex. Mandible with 5 teeth. Clypeus evenly convex, without longitudinal central carina, anterior margin with a pair of small denticles and weakly emarginate between the denticles. Antennae long, scape surpassing occipital corner by about 1/2 of its length. Eyes convex, close to occipital corners. In profile view, dorsum of alitrunk strongly convex. promesonotal suture distinct, metanotal groove absent. Propodeum with a pair of small teeth, dorsum and declivity relatively straight. In dorsal view, shoulders of pronotum form a pair of right angles. In front view petiolar node with a pair of long slender lateral spines, laterodorsally pointed and slightly curved inward, without median teeth, dorsal margin of the node straight. In profile view. petiolar node nearly triangular, lateral spines bent backward. Mandibles sparsely and finely punctured. Head, alitrunk and petiole densely and finely punctured, relatively dull. Gaster with weak micro-reticulation. less shiny. The whole body with abundant depressed short pubescence. Anterior part of head with sparse suberect hairs, apex of gaster with abundant suberect hairs. Occiput, alitrunk and dorsum of first gastral segment without hairs. Scapes with dense depressed short pubescence, without hairs. Femora and tibiae with abundant depressed pubescence. without hairs. Body black. with blue metallic luster, eyes blackish brown, legs black. Hairs grayish white.

Type Material
The type specimens are deposited in the Insect Collections, Faculty of Resources. Southwest Forestry College. Kunming. Yunnan Province, China.

Holotype: worker, No. A97-112, 1100 m, Sanchahe River, Mengyang Town, Jinghong County, Yunnan Province. III.1.1997, collected by Miss Dai Se-Ping in mountain rain forest. Paratypes: 1 worker. No. A97-1005, 880 m. Sanchabe River. Mengyang Town. Jinghong County. Yunnan Province. 1997-VIII-8, collected by Dr. Xu Zheng-Hui in bamboo forest; 1 worker, with same data as No. A97-1005, but No. A98-136, III.6.1998, with gaster lost.

References based on Global Ant Biodiversity Informatics

 * Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
 * Ran H., and S. Y. Zhou. 2013. Checklist of Chinese Ants: Formicomorph Subfamilies ( Hymenoptera: Formicidae) (III). Journal of Guangxi Normal University : Natural Science Edition 31(1): 104-111.
 * Xu Z. H. 2002. A systematic study on the ant subgenus Cyrtomyrma Forel of the genus Polyrhachis Smith of China (Hymenoptera; Formicidae). Acta Entomologica Sinica 45(4): 522-530.
 * Zhou S.-Y. and Huang J.-H. 2002. Two new species of the ant genus Polyrhachis F. Smith (Hymenoptera: Formicidae) from Guangxi, South of China. Pages 144-147 in Animal science. Shaanxi Normal University Publishing House, Xian, China.