Tisamenus charestae

Tisamenus charestae is a comparatively small, slender, and sparsely spined Tisamenus species. They resemble the somewhat larger and slender Tisamenus polillo. Males of Tisamenus charestae have stronger and less sharp spines above the hips (supracoxalia) on the pleurae of the meso- and metathorax. They also have two large spines of approximately equal size on the anterior pronotum (pronotals). In Tisamenus polillo have three pronotal spines, with the posterior spines becoming smaller. Males of Tisamenus charestae reach a length of 29.6 to 30.7 millimetres (1.17 to 1.21 in). The almost spineless females reach a length of 38 to 43 millimetres (1.5 to 1.7 in). They differ from those of Tisamenus polillo in the significantly shorter, conical and more tuberous than spiny supracoxalia of the mesopleurae and metapleurae, which are more spiny in Tisamenus polillo. Terga one to four of the abdomen have only small, paired tubercles and no spines like in Tisamenus polillo. The lower part of the ovipositor, known as the subgenital plate, extends over the upper part, the epiproct, by more than half its length. The eggs are 3.3 millimetres (0.13 in) long, 3.1 millimetres (0.12 in) wide, and 1.9 millimetres (0.075 in) high. A characteristic feature is the small micropylar plate, which, at 2.1 millimetres (0.083 in), is only about two-thirds the length of the capsule. …

The species has so far only been found in the province of Ifugao in northern Luzon, where it was collected in the Cordillera Central Mountains at an altitude of 1,750 metres (5,740 ft).