Carprenter—The Geographical Distribution of Dragonflies. 465 
The Neotrorican Recion has forty genera of Ccenagri- 
nine; and thirty, a large proportion, are peculiar—these 
including the whole of that remarkable group the Pseudostig- 
matina which comprises the largest (though far from the most 
robust) of living dragonflies. Fourteen of the peculiar genera are 
confined to the Brazilian sub-region. The Chilian sub-region has 
representatives of four genera, two of which (Ozyagrion and 
Acanthagrion) are Neotropical, one (Erythromma) northern, and 
one (Lestes) cosmopolitan. Three genera (Amphiagrion, Anomal- 
agrion, and Archilestes) are Neotropical and Sonoran. 
As with the last sub-family, the Sonoran Rucion is destitute 
of characteristic forms. Only ten genera, all more or less widely- 
ranging, are represented there. 
Fourteen genera of the sub-family are found in the HoLarcric 
Recion, but two of these (Copera and Ceriagrion) are Oriental 
incursors, only occurring in China and Japan. Only one genus 
(Mesopodagrion from HKastern Tibet) can be considered peculiar. 
But Platycnemis, with ten Holarctic species, has only one else- 
where—in Mauritius; while Ownagrion and Erythromma have the 
majority of their species confined to the Holarctic Region. Pyr- 
rhosoma has two Kuropean and one Californian species. 
Sixteen genera inhabit the Erurtopran Recion. Seven of 
them are found nowhere else, while another (Brachybasis) is con- 
fined to Africa and Madagascar. Four of the peculiar Ethiopian 
genera have only been recorded from West Africa. 
The Mascarzene Reeton is comparatively rich in dragonflies 
of the sub-family, possessing thirteen genera, of which five are 
peculiar. Except Brachybasis, mentioned above, as confined to this 
region and the Ethiopian, the non-peculiar Mascarene genera have 
all a wide or discontinuous range. 
Twenty-seven genera of COcenagrionine are found in the 
Ortenrat Reaion, thirteen of which can be reckoned as peculiar, 
including Ceriagrion, which transgresses the frontiers into China 
and Japan, and Platysticta with two, and Archibasis with one 
Papuan species. Two genera (Caconeura and Onychargia) are 
Oriental and Australian only. The AusrraLian Reaion is almost 
as rich as the Oriental in this sub-family, having twenty-three 
genera, ten of which are not found elsewhere. New Zealand has 
