Handbook of Medical Entomology

by William A. Riley; O. A. Johannsen

cc. Antennal arista pectinate; bases of the antennæ separated by a flattened carina. Rhiniinæ R. D.

d. Cell R₅ open, or closed at the margin.

e. Third segment of the antenna twice as long as the second; claws of both sexes short; cell R₅ open. I. lunata. Eastern Hemisphere. Idia Meigen

ee. Third segment of the antenna three times as long as the second; cell R₅ open or closed; claws of the male long and slender, of the female shorter than the last tarsal joint. I. mandarina, China. Idiella B. B.

dd. Cell R₅ petiolate. Rhinia; and Beccarimyia Rdi.

bb. Proboscis long, directed forward, adapted for piercing. Stomoxinæ

c. Arista flat, pectinate above with plumose rays; sternopleurals 1:2; bases of the veins R₁ and R₄₊₅ without setæ; base of the media bowed down; apical cell opens before the apex of the wing. African species Glossina Wied.

d. Species measuring over twelve mm. in length. G. longipennis and fusca.

dd. Species less than twelve mm. in length.

e. All segments of the hind tarsi black.