948 REPORT OF THE HARVARD AFRICAN EXPEDITION 
and twenty-four are Ethiopian and several more African forms are as yet un- 
described. Their number in Africa will certainly reach, if not surpass, that of 
the species of Tabanus. 
As might be expected, these numerous species have invited a further sub- 
division of the genus; but, of the several generic or subgeneric names recently 
proposed for species of Haematopota in the broad sense, Hippocentrum alone 
appears to represent a natural subdivision worthy of generic rank. 
The characters of the other proposed subdivisions of Haematopota, the names 
of which have been listed above, may be gathered from the subjoined synoptic 
key: 
1. Third antennal segment composed of three divisions only, of which the basal one is ovate, 
Cltssonllemian.o Bietssccd oa wes a digssia dis SO ROE nL ee Tee ee eee Sterrhocera. 
Third antennal segment composed of five divisions. (South America)....... Archiplatius. 
Third antennal sezment composed of four divisions. ............5-.2.+.255---sese == 2. 
2. Femora and tibiae, especially of hind legs, with dense fringes of long hairs; the hind tibiae 
TORE OMISSION GC sce a-4.4 smo wa Gee ween 6 @ op eee ee eee eee Austenia. 
Bemora.and tbe mot conspicuously tmnged: ccc eee aoe Oe oe ee eee 3. 
3. Basal division of third antennal segment broadly ovate, disciform.................... 4, 
Basal division of third antennal segment elongate or slender........................- 6. 
4. Basal division of third antennal segment without a projecting edge along the upper 
CIC (ee nee ene nt Oe EN nt ih py Wr, ho N iG 5 ee feo: Potisa. 
Basal division of third antennal segment with a median, bluntly projecting edge on the 
Oe: ys! 6 Cat es a ees Rene Mm, Emer rn more en rea lV hs, a 5. 
5. First antennal segment with a deep, transverse furrow or notch on the upper side before 
MIAN AOC an eeeiay iis, 5, Are ean AROSE OS eee Se ee Tylopelma. 
First antennal segment without preapical notch or furrow, strongly raised at apex on the 
MIST SUC ae . © swsdia: Ast s0Qe, eoes aitacee ieee kane etree hee a ee ee Parhaematopota. 
6. Wings infuscated, with numerous, scattered spots, arranged more or less into ‘‘rosettes”’ 
Stare veri PERNT havi rag tha, Beale seme ams ashe Neue san Rome te bay ake gee en ene ee Haematopota, proper. 
Wings brownish black, only with a hyaline apical spot...........4.5.-.0ese0-- Holcoceria. 
Of these several divisions, Austenia is perhaps the only one representing a 
natural group. In tropical Africa it comprises: H. bullatifrons Austen, H. 
ciliatipes J. Bequaert, H. daveyz Austen, and H. grahami Austen; perhaps also 
H. mgripennis Austen and H. niweipalpis (Enderlein), both of which belong in 
Tylopelma, if one takes into account the shape of the first antennal segment. 
Some other species, however, such as H. nobilis (Griinberg), H. decora Walker, 
and H. neaver Austen, show a tendency toward the production of fringes on 
the legs. Of Oriental species, H. cilipes Bigot, H. rubida Ricardo, H. singu- 
laris Ricardo, and H. lata Ricardo appear to belong in Austenia and some of 
these species have the hind tibiae much more widened than any of the African 
forms. 
Holcoceria was based upon the aberrant wing markings of the type species, 
H. nobilis Grinberg; but Austen (1914, Bull. Ent. Res., IV, p. 300) has de- 
scribed H. nigripennis, which is structurally like H. nobilis, but has a few light 
streaks and blotches in the wing, being transitional in this respect between 
Holcoceria and typical Haematopota. It does not seem that Holcoceria can be 
retained even as a subgenus. 
The remaining names have been based upon peculiarities of the antennae. 
