Crematogaster sp.5

Japanese Name

Harinaga-shiriage-ari

Total length of workers around 3 mm. Body color brown. Antennal club 3-segmented. Clypeus with fine, longitudinal striae. Promesonotal suture indistinct or distinct; in the latter case the anterior border of the mesonotal dorsum is triangular. Pronotal and mesonotal dorsa smooth. Anterior half of mesonotal dorsum nearly flat, posterior third depressed, but only a little concave in the middle; margined posterolaterally. Mesonotal pleuron wholly punctured. Metanotal groove distinctly impressed, the lateral borders of the dorsum not lamellate. Propodeal spines slender and long, each 3.5 to 4 times as long as the width of its base. Petiole wider than long, the sides in dorsal view abruptly narrowed posteriorly. Subpetiolar process undeveloped. Postpetiolar dorsum with a median furrow.

This species resembles C. vagula, but is distinguishable because its pronotal dorsum is smooth and the propodeal spines slender and long.

Kuchinoerabu-jima I., Amami-oshima I. [Kazuo Hayashida leg.].