866 REPORT OF THE HARVARD AFRICAN EXPEDITION 
Tribe Haematopotini 
Haematopota Meigen (Chrysozona Meigen). 
Hippocentrum Austen. 
Although I have been unable to recognize many of Enderlein’s recently 
proposed generic names, I have made what I believe an honest attempt to 
retain those that seemed to cover fairly natural groups. When the characters 
separating complexes of apparently related species are altogether too trifling, 
I have preferred to use some of Enderlein’s names in a subgeneric sense. More- 
over, I feel that I have erred rather on the conservative side and that future 
work will reduce rather than increase the number of genera here accepted for 
the Ethiopian Tabanidae. 
Key To ETHIOPIAN GENERA OF TABANIDAE 
1. Hind tibiae without spurs. Proboscis well-developed, at most as long as the head, 
usually shorter. Ocelli usually absent, very rarely vestigial or present............ 2. 
Hind tibiae with two spurs, which are sometimes very small......................-. Ds 
2. Third antennal segment composed of three or four divisions; the basal portion bearing 
on the upper side a long, finger-shaped process at the base and, in the female, a 
second short tooth or protuberance in the middle. Ocelli present. Eyes bare. 
Frons elongate in the female. Fork of third longitudinal vein without appendix. 
PE ee ee Ee MN Ee yy vec MAR heh Sid an Thawmastocera. 
Third antennal segment plain or toothed at base, but without a long, finger-shaped 
process. Ocelli absent or vestigial im the Afmioan species: -.... 5... 055.52. a2. ones 3. 
3.', Third antennal segment composed of five divisions, the basal division more or less 
crescent-shaped. Eyes bare, pubescent or hairy, either uniformly colored or with 
straight or curved cross-bands, rarely with numerous rounded spots. Frons elongate, 
aimost alwaye much longer thaniwide. <2... 2.4. ..0slsehweesins cece Unte eee Tabanus. 
Third antennal segment composed of three or (more generally) four divisions; the basal 
division more or less cylindrical or disciform, not crescent-shaped. Frons very 
wide, often as wide as long. Eyes bare, generally with zigzag stripes in life... ... 4, 
4, Head wholly or mostly shiny. Antennae very slender; the first segment elongate, at 
least six times as long as the second. Terminal segment of palpi usually swollen 
and more or less shiny on the outer side. Wings with a short or no appendix on 
the fork of the third longitudinal vein, entirely dark or with pale streaks or blotches. 
Ee Et ee Ve ee ete eer ae OE Ee Pa Yuh ee or Hippocentrum. 
Head mostly covered with a dull bloom, setting off shiny calli or velvety spots. Antennae 
less slender; the first segment shorter and more swollen, usually less than six times 
as long as the second. Terminal segment of palpi not considerably swollen nor 
shiny. Wings more or less infuscated, as a rule with numerous pale blotches 
arranged into ‘‘rosettes”’ or groups, more rarely forming hyaline streaks; the fork 
of the third longitudinal vein in the majority of cases with a long appendix. H aematopota. 
5. Proboscis vestigial or aborted. Palpi minute. Ocelli present. Eyes bare............. 6. 
Proboscis well-developed, usually longer than the head, often considerably so. Palpi 
latge. Ocellt Presemisoe el baeml: si lacdes. «Wehner cao. coe ye Mn een, ee ee 8. 
6. Fourth posterior cell closed; the second, third and fourth posterior cells separated by 
longitudinal veins which reach the hind margin. (Male unknown).......... Lesneus. 
Fourth postemorn cell opeMiy jay tee 2: «50 aid Aaets aap iatea erg enen lee ny ey eo re 
7. Third antennal segment composed of eight divisions (the style, of four divisions). 
Kyes separated in both sexes; frons very broad in the female, with a large, trans- 
verse callosity; considerably narrowed, but still distinct in the male......... Adersia. 
Third antennal segment composed of seven divisions (the style, of four divisions). 
Frons very broad in the female, but without callosity; in the male the eyes are 
HOMO. oy vas 5 -v peau ee Renn ee, ae nt ane Braunsiomyia. 
