4. Sphex nitidiventris ^HNS.

S. niger; abdomine nigro-caeruleo, laevigata, nitido; alis fuscis.

Female. Length 12 lines. Black; the face with silvery pubescence, and thinly covered with long black hairs; the clypeus with a central longitudinal carina at the base, which terminates at the middle, from whence to the anterior margin is a broad, smooth, shining space. Thorax shining and finely punctured; the metathorax opake and covered with long, loose, black pubescence; the legs shining, the posterior tibiae with shining grey pile within; wings brown, darkest at their base. Abdomen blue, and very smooth and shining, oblongovate; the apical segment vertical.

Hab. Aru.