Notes on Halarachnine Larval Morphology and a New Species of Pneumonyssus Banks (Acari: Dermanyssidae)

The number of recognized species of Orthohalarachne Newell is reduced from seven to two by listing five new synonyms as follows: O. diminuata (Doetschman, 1944) =O. chabaudi Gretillat, 1960 =O. letalis Popp, 1961; and O. attenuata (Banks, 1910) =Halarachne zalophi Oudemans, 1916 =H. rosmari Oudemans, 1916 =H. magellanica Finnegan, 1934. Both species are now known from Australian seals (Carnivore: Otariidae), O. diminuata being recorded from the Australian Region and Arctocephalus doriferus Jones, and O. attenuata from Neophoca cinerea (Péron and Lesueur), all for the first time. The larva of each species is described in detail. The genus Pneumonyssus Banks, previously known only from Africa and S. E. Asia, principally in primates, is now listed from east of Wallace's Line. Both sexes and the larva of P. capricorni sp. n. are described from a cuscus. Phalanger maculatus (Desmarest) (Marsupialia: Phalangeridae), in Papua New Guinea. It is best compared with P. simicola Banks from Indonesian macaques, Macaco Lacépède (Primates: Cercopithecidae).