Catalogue of hymenopterous insects collected by Mr. A. R. Wallace at the Islands of Aru and Key. Author Smith, F. text Journal of the Proceedings of the Linnean Society of London, Zoology 1859 3 132 158 http://antbase.org/ants/publications/10342/10342.pdf journal article 10342 03D4C4E8-74F9-42F2-8FD1-00A6DC22903A 6. Sphex gratiosa . S. capite thoraceque nigris, abdomine caeruleo, alis fusco-hyalinis. Male. Length 10 lines. Head and thorax black; the face densely clothed with pale golden pubescence; the labrum and mandibles highly polished, very smooth and shining; a thin pale pubescence is scattered over the head, pro- and mesothorax, the latter obscurely chalybeous above, shining, and finely and closely punctured, with an abbreviated, deeply impressed line in the middle anteriorly; the posterior margin of the prothorax covered with shining silvery pubescence; the metathorax opake, and clothed with black pubescence; wings fuscohyaline, the anterior pair darkest towards their base, the nervures dark fusco-ferruginous, nearly black. Abdomen smooth, shining dark blue; beneath, the margins of the segments have a bright, glittering, pale-golden pile.