Chalarus exiguus (Haliday, 1833) Pipunculus exiguus Haliday, 1833: 162 Chalarus konishii Morakote, in Morakote & Hirashima, 1990: 169. Synonymy: Jervis (1992: 290). Diagnosis: Males could not be recorded in this study. See Jervis (1992) for a characterisation. Female with frontal facets greatly enlarged (J92 Fig. 2 B); frons very narrow, at narrowest point 1.0 times diameter of largest frontal facet; flagellum dark brown; legs dark brown but base of femora and area around femoral-tibial joints may be somewhat paler; pulvilli of all legs of same size, shorter than distitarsus; hairs on femora dark brown but pvsr of mid femur light brown; hairs on thorax and abdomen dark brown; hind femur with apical hairs of pdsr extending as far as apex; abdominal tergites dark brown; ovipositor as in Figs 53 & 56. See Table 1 for coxI and ITS2 barcode sequence accession numbers. Annotations: The taxon was originally described from the female holotype. No male specimens could be associated with the two females sequenced in this study, but following Jervis (1992), who reared males and females from Alnetoidia alneti taken on the same day and locality, adult males are morphologically indistinguishable from C. holosericeus. However, Jervis (1992) distinguishes males of C. exiguus and C. holosericeus on the basis of pupal characters.

Published as part of Kehlmaier, Christian & Assmann, Thorsten, 2008, The European species of Chalarus Walker, 1834 revisited (Diptera: Pipunculidae), pp. 1-39 in Zootaxa 1936 on page 21, DOI: 10.5281/zenodo.184950