The distribution of Acomopterella species in the Palaearctic region has been re-examined in this study, using recently collected material. The European species was found to be distributed in the eastern Palaearctic as well. A second Palaearctic species from Honshu (Japan) is herein described. The morphology of adult specimens was studied by light microscopy and scanning electron microscopy. The...

BACKGROUND AND AIMS Pterostylis is an Australasian terrestrial orchid genus of more than 400 species, most of which use a motile, touch-sensitive labellum to trap dipteran pollinators. Despite studies dating back to 1872, the mechanism of pollinator attraction has remained elusive. This study tested whether the fungus gnat-pollinated Pterostylis sanguinea secures pollination by sexual deception...

The Nearctic species of Phthinia Winnertz are revised. Eight species are recognized, of which four are newly described; P. tanypus Loew (= P. carolina Fisher n. syn., and P. catawbiensis Shaw n. syn.), P. lobata Zaitzev, P. miranda Zaitzev, P. ramificans Zaitzev, P. nepunei n. sp., P. cascadica n. sp., P. meicigama n. sp. and P. mikmaqi n. sp. A key to these species is also provided. 

The primary types, secondary types, and some other identified specimens of 407 Neotropical species of Mycetophilidae at the Natural History Museum, London were examined. Notes were made on the condition of the primary types, their labels, and presence of other specimens in the type series. Additional comments are made about types, secondary types and some few other cases worth of note mistakenl...