95 
10. 
REPORT OF THE HARVARD AFRICAN EXPEDITION 
hind tarsi conspicuously creamy white. Frons very broad, wider at the vertex than 
one eye. First antennal segment slender, much longer than half the width of the 
vertex; basal division of third segment elliptical. Length, 6 to 6.5 mm.... H. vexans. 
Tibiae either with more distinct rings, or with two rings to the hind tibiae; or the basal 
segments of the tarsi not conspicuously whiter than the rings of the tibiae........ 
Hind tibiae with one conspicuous pale ring close to the base; rarely with a fainter pre- 
apical pale spol OM MMe occas g cnet Ra ae gla geile ele eee 
Hind tibiae with two equally distinct or equally faint pale rings.............-+.+++++- 
11. Antennae very long, black; first segment as long as the width of the vertex, strongly swol- 
12. 
13. 
14. 
len throughout, fairly uniformly so when seen from above, but in profile conspicu- 
ously humped in its apical third dorsally and with a deep preapical transverse 
depression; basal division of third segment slender, slightly broader basally, a little 
shorter than the first segment and less than three times the length of the apical three 
divisions together. Frontal callosity black, occupying nearly one-third of the length 
of the frons, broadly touching the eyes, very prominent and divided lengthwise by a 
saddle-like depression. Basal white rings of the tibiae very broad, the middle tibiae 
also with a preapical white ring; tarsi black, the middle and hind basitarsi rather 
obscurely dirty white at the base; fore tarsi much broader than usual; femora and 
tibiae with long hairs, those on the outer margin of the hind tibiae forming a dense 
fringe, which is much shorter than the width of the tibiae. Wing with relatively few 
pale blotches, forming no rosettes; discal cell with two hyaline cross-stripes; first 
submarginal cell with two basal blotches, a preapical curved streak entering the 
second submarginal, a sinuate streak basad of the appendix (connected with a large 
hyaline spot of the marginal cell, beyond the stigma), and two small spots apicad of 
the appendix. Large, blackish species; dorsum of the thorax with a few conspicuous 
10. 
ile 
18. 
grayish=winite markines, ILeneth, 12min 2.022.206 cece ae octeien H. nigripennis. 
Antennae of a different shape; the first segment not humped in the apical third; when a 
transverse preapical depression is present (as in H. decora), the antennae are much 
shorter and the pale blotches of the wing are more numerous..................-. 
Large species, 10 to 12.5 mm. in length. Hind tibiae often with a second, faintly indi- 
cated, paler spot before the apex. First antennal segment about as long as, or only a 
little shorter than the width of the vertex, without preapical transverse depression; 
basal division of the third segment narrow, slightly produced dorsally near the base. 
Frontal callosity large, occupying one-third of the length of the frons............. 
As a rule smaller species; when over 10 mm. in length, the above combination of charac- 
[rite Wierd (01g 0}Ke3\01 1h a ee ere eer Rei ea ye ese re rs i ON 
Mummy brown to blackish brown species, with the hind borders of the abdominal tergites 
narrowly gray pollinose; dorsum of thorax with distinct, narrow, yellowish-gray, 
longitudinal stripes. Fore tibiae distinctly swollen, slightly wider than the femora. 
Third antennal segment slightly wider, its basal division distinctly less than twice the 
length of the terminal three divisions together. Pale blotches of wing more conspicu- 
ous, the three rosettes more distinct; a wide, hyaline half-circle (connected with a 
large spot of the marginal cell, apicad of the short stigma) in the first submarginal 
cell (above the appendix); rosette at the apex of the discal call consisting of four ring- 
like spots 
Paler, yellowish-brown species, with the abdomen more uniformly pale brown dorsally and 
the dorsum of the thorax only faintly striped. Fore tibiae scarcely swollen, hardly 
wider than the femora. Third antennal segment more slender, its basal division a 
little over twice the length of the terminal three divisions together. Pale blotches of 
wing much less conspicuous, the rosettes indistinct; a narrow hyaline cross-streak 
apicad and basad of the appendix in the first submarginal cell; stigma long, followed 
by a rather indistinct pale spot; rosette at the apex of the discal cell consisting of 
simple, curved streaks 
First antennal segment much swollen, not more than twice as long as thick seen from 
above, and only a little longer than half the width of the vertex; dorsally with a 
slight transverse depression before the apex; basal division of third segment moder- 
rately widened, elongate elliptical, about as long as the first segment. Length, 7 to 
10 mm 
15. 
14. 
Oe Ce re eee ee ate) ene ee he eT Oat Were ene owns H. neavei. 
Dae iac® diese al ek URC oe en ee a eet ae H. inornata. 
EW ee Co) ae Le Wer yee ee ee eee H. decora. 
