VETERINARY ENTOMOLOGY FOR INDIA 197
usual in the Western Oases and a considerable number of cases of trypanosomiasis
occurred in camels, but none was observed in any other animals."
The Tabanidæ are divided into two sub-families and the Indian forms are com-
prised under ten genera.
These are differentiated as follows :—
Underside of tip of hind-tibia with a pair of (often con-
spicuous) spines or spurs; ocelli usually present . Pangonianæ.
Hind-tibia without spurs at tip ; ocelli absent . . Tabaninæ.
Pangonianœ (Partly adapted from Senior-White, 1927).
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1. Proboscis very long, longer than the length of |
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abdomen........ |
Corizoneura, Rond. |
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Proboscis not unusually long, shorter than the |
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length of abdomen ...... |
2 |
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2. Third antennal segment with an acute spine on first |
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annulation...... |
Gastroxides, Saund. |
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Third antennal segment without spine |
3 |
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3. First and second antennal segments long, first seg- |
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ment equal or sub-equal in length to second seg- |
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ment ........ |
Chrysops, Meig. |
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First antennal segment long, second short |
4 |
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4. Tibiæ normal...... |
Silvius, Meig. |
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Tibiæ large and flattened. Whole aspect of insect |
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bee-like ........ |
Melissomorpha, Ric. |
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Tabaninæ (From Senior-White, 1927). |
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1. Apical portion of third antennal segment of three |
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divisions........ |
Haematopota, Meig. |
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Apical portion of third antennal segment of four |
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divisions........ |
2 |
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2. Third antennal segment simple, no basal tooth or |
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process ........ |
3 |
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Third antennal segment with a basal tooth or |
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process........ |
4 |
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3. Antenna arising from a frontal tubercle, third seg- |
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ment cylindrical. Palpus thickened basally, bent, |
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apically pointed ...... |
Udenocera, Ric. |