The ultimate instar larvae of the Central American species op Progomphus Selys, with a description of P. belyshevi spec. nov. from Mexico (Anisoptera: Gomphidae)

A survey is given of the ultimate instar larvae or exuviae of all Progomphus spp, known from Central America. The hitherto unknown exuviae are described and illustrated. -— P. belyshevi sp. n. (holotype allotype $: Mexico, State of Morelos, Xochitepax, 7-VII-1987; deposited in FSCA) is described, illustrated and compared with P. borealis McLachlan, from which it strikingly differs by the much darker sides of the pterothorax, due to the occurrence of the midlateral stripe, which is conjoined with the femoral stripe. — P. williamsi Needham, 1943 is synonymized with P. clendoni Calvert, 1905.