Pseudohercostomus echinatus Stackelberg, 1931 (Fig. 7) Stackelberg, 1931: 776, description male. Type locality: Ramu Lamongan, E Java, Indonesia (in coll. ZI, St. Petersburg). Parent, 1934: 303, Buitenzorg, Java, Indonesia (in coll. MNHN, Paris). Hollis, 1964: 255, Batavia, Java, Indonesia (in coll. Naturalis, Leiden). Brooks, 2005: 134, discussion systematic position. Material examined. Male, Buitenzorg, Java, 17 April 1908, Le Cordier; Coll. Comtesse de Béarn, Croisière du Nirvana (in coll. MNHN, Paris). The type material has been located in the collections of the Zoological Institute in St. Petersburg, but was not available at the time of the present research. The present study is based on the sympatric material seen by Parent (1934) that was also studied and illustrated by Brooks (2005: fig. 38A–D). Diagnosis. A species with quadriserial acrostichal bristles. Scape yellow. Postpedicel triangular, a little longer than high. Mesoscutum metallic blue in ground-colour with a green hue depending on the angle of view. Only four (sometimes five) dorsocentrals present. The male terminalia are represented in detail by Brooks (2005: fig. 38). Distribution. Java, Indonesia. Comments. For the differences with P. congoensis, new species, and P. singaporensis, new species, we refer to the comments stated in the respective species descriptions of these species and to the species key given hereunder. Pseudohercostomus echinatus was reported from the Afrotropical Region (Grichanov, 2004) and consequently in catalogues (Yang et al., 2006), but these records concern a similar but different species, P. congoensis, new species, described here above. Hence, P. echinatus does not seem to have a wide circumtropical distribution, but is only confirmed from Java, Indonesia, in the Oriental Region.

Published as part of Grootaert, Patrick & Velde, Isabella Van de, 2021, Understanding the tangled taxonomy of the genus Pseudohercostomus Stackelberg, 1931 (Insecta: Diptera: Dolichopodidae) with description of new species from Singapore and DR Congo, pp. 324-335 in Raffles Bulletin of Zoology 69 on pages 333-334, DOI: 10.26107/RBZ-2021-0055, http://zenodo.org/record/7174735