The description of the larvae of Neonectes babai Sato (Coleoptera: Dytiscidae: Hydroporinae), with a discussion of its phylogenetic relationships with members of the Oreodytes scitulus species group

Descriptions of structures of the 2nd and 3rd instars of Neonectes babai Sato are presented. The chaetotaxy and porotaxy of the cephalic capsule, head appendages, legs, last abdominal segment, and urogomphi are discussed in detail. The larvae of N. babai similar to those of N. natrix (Sharp) from which they are distinguished by several mensural and chaetotaxal characteristics. Both species are closely related phylogenetically to members of the Oreodytes scitulus species group as they share the presence of an additional pore on urogomphomere 1, an elongate urogomphus with urogomphomere 1 longer than urogomphomere 2, an elonagte secondary sera on dorsal margin of tibiae, and a short frontoclypeus.