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)

Dorsal side shining. Colour of head, pronotum, scutellum and elytra black and with a blue-green metallic gloss. Head with dense, fine punctures. Pronotum longer than wide, lateral side smooth. On disc with five large shallow depressions. Anterior margin of pronotum with three depressions, one in the centre, two behind this. Posterior margin with two depressions. Elytral length 2.1 mm, elytra widest on posterior third, lateral side smooth, striai punctures, wider than interstriae, tubercle absent. 3rd, 5th and 8th interstriae carinate in almost whole length. Apical holes absent. Elytral apices rounded. Male genitalia (Fig. 25): Basal piece long, páraméra longer than median lobe. Etymology: The species is named after my daughter ASCHNAKIRAN MAKHAN. Hydrochus roepnaraini sp. n. (Fig. 26) Holotype: male. New Caledonia, 24.8.1948, FORD (only the holotype) (Bishop Mus.). Description (holotype male): Body elongate, length 4.3 mm, width 1.7 mm (one male 3.1 mm long). Dorsal side shining, colour of head pronotum, scutellum and elytra greyish coppery and with a blue-green metallic gloss. Head with dense, fine punctures. Pronotum long as wide, lateral side smooth. 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 2.8 mm, elytra widest on posterior third, lateral side smooth, striai punctures wider than interstriae. 3rd, 5th and 8th interstriae carinate in almost whole length. Tubercle absent. Apical holes absent. Elytral apices rounded. Male genitalia (Fig. 26): Basal piece short, páraméra longer than median lobe. Etymology: This species is named after my brother ROEPNARAIN MAKHAN. This species seems to be allied to H. aschnakiranae sp. n. but there is a difference in the shape of male genitalia. In H. aschnakiranae basal piece is long, in H. roepnaraini short. Hydrochus radhakishunae sp. n. (Fig. 27) Holotype: male. Paraguay, Cobecionados en Asuncion, 1912, A. BARBERO (MUS. Berlin). - Paratype s: 6 males (same data as holotype) (1 male Mus. Budapest). Description (holotype male): Body elongate, length 2.8 mm, width 0.9 mm (one male 2.3 mm long). Dorsal side shining. Colour of head black, colour of pronotum, scutellum and elytra black and with a blue-green metallic gloss. Head with dense, fine punctures. Pronotum longer than wide, lateral side smooth. 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 1.8 mm, elytra widest on posterior third, lateral side smooth, striai punctures coarse, wider than interstriae, 3rd, 5th and 7th interstriae carinate in almost whole length, tubercle absent. Elytral apices narrowly rounded. Apical holes absent. Male genitalia (Fig. 27): Basal piece short, páraméra same size as median lobe. Etymology: This species is named after my niece ROSHNIE DEBI RADHAKISHUN-RAMLAKHAN. This species is similar to H. teunisseni sp. n., but there is a difference in the shape of male genitalia. Median lobe in H. radhakishunae is wider and longer than in H. teunisseni. Hydrochus teunisseni sp. n. (Fig. 28) Holotype: male. Paraguay, Cobecionados en Asuncion, 1912, A. BARBERO (only the holotype) ( Mus. Berlin). Description (holotype male): Body elongate, length 3.5 mm, width 1.1 mm. Dorsal side shining. Colour of head, pronotum, scutellum and elytra greyish coppery and with a blue-green metallic gloss. Head with dense, fine