Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 86. (Budapest 1994)

Makhan, D.: Thirty-five new Hydrochus species from the Old and the New World (Coleoptera: Hydrophilidae)

Pronotum longer than wide, lateral side with granules. Disc with five large shallow depressions. Anterior margin of pronotum with three depressions, one at the centre, two behind this. Posterior margin with two depressions. Elytral length 1.4 mm, elytra widest on posterior third, lateral side smooth, striai punctures coarse, interstriae wider than striae, 3rd, 5lh and 7th interstriae carinate in almost whole length, tubercle absent. Elytral apices narrowly rounded. Apical holes absent. Male genitalia (Fig. 15): Basal piece long, paramcra longer than median lobe. Etymology: This species is named after my sister GITARAI MAKHAN This species similar to H. imamkhani sp. n. H. gitaraiae is easily distinghuished by it smaller size. Hydrochus chitraae sp. n. (Fig. 16) Holotype: male. New Guinea, Western Distr. Oriomo River, 3 m, l.V 111.1964, CLISSOLD (only the holotype) (Bishop Mus.). Description (holotype male): Body elongate, length 2.8 mm, width 1.0 mm. Dorsal side shining. Colour of head black, colour of pronotum, scutellum and elytra brown and with a blue-green metallic gloss. Head with sparse, fine punctures. Pronotum longer than wide, lateral side smooth. Disc with five large deep depressions. Anterior margin of pronotum with three depressions, one at the centre, two behind this. Posterior margin with two depressions. Elytral length 1.8 mm, elytra widest on posterior third, lateral side with fine granules, striai punctures wider than interstriae, 5th and 8lh interstriae carinate in almost whole length, tubercle absent. Apical holes absent. Elytral apices rounded. Male genitalia (Fig. 16): Basal piece long, paramercs longer than median lobe. E t y m o 1 o g y: This species is named after my sister-in-law CHITRA RATTAN. This species is very similar to H. chitaniei sp. n., but there is a difference in the shape of male genitalia: median lobe in H. chitraae short and widened, median lobe in H. chitaniei long and narrowed. Figs 15-21. Male genitalia of holotypes. 15 = Hydrochus gitaraiae sp. n., 16 - //. chitraae sp. n., 7 = H. chitaniei sp. n., 8 = H. imamkhani sp. n., 9 - H. rodjani sp. n., 0 = H. nadesui sp. n., 21 = H. kunarajahi sp. n. (scale = 0.25 mm)