Petalocephala subaquila Distant

Petalocephala subaquila Distant Figs 10A–D, 19A. Petalocephala subaquila Distant 1908: 169. Diagnosis. Female. Crown medially longer than interocular distance. It closely resembles P. balehonnurensis but lacks the median dark brown maculate stripe extending from crown to mesonotum. P. kempi also has crown longer than interocular distance and P. subaquila differs from it in having very finely punctate crown surface and lateral margins converged right in front of eyes compared to parallel sided crown lateral margins in the former species. Description. Distant (1908) adequately described the external features of this species. Additional features are as follows. Crown lateral margins slightly concave in front of eyes, apex conically rounded, median carina prominent; 1.4× as long as interocular distance, 1.4× as long medially as pronotum. Ocelli slightly closer to adjacent eyes than to each other. Pronotal lateral margins divergent posteriorly, distance between posterolateral angles 1.19× as long as that between anterolateral angles; 1.16× as long as pronotum. Sternite VII posterior margin almost straight with median concavity (Fig. 10C). Material examined. MYANMAR: SYNTYPE ♀, “Ruby Mines (Doherty)”, “Distant Coll.1911-383”, “ subaquila Dist., type”, “Type”, “ Syntype ”, “NHMUK 010592234” (BMNH). Remarks. Distant (1908) described this species based on an unspecified number of female specimens (syntypic) with data: “ Burma; Ruby Mines (Doherty)”.