196 PYGIOPSYLLA ROBINSONI. 
projects a little into the antennal groove. The gena is pro- 
vided with a rounded transparent piece. 
The pronotum bears a comb of 2x10 teeth; these are 
black, whilst a tooth-like piece of the pronotum itself 
is transparent and flanks the comb laterally. Before the 
comb a row of 26 bristles, alternating with shorter ones. 
Before this row, on the back, a row of 2 X 4 bristles, which 
are a little stronger and longer than the shorter ones just 
quoted. 
Mesonotum with a broad brown collar without any 
indication of teeth. lt bears moreover 4 or 5 transverse 
somewhat oblique rows of bristles, of which the fore- 
most are the shortest, the hindmost (5 in number) the 
longest and strongest, alternating with shorter ones. Just 
above the chitinous incrassation of the mesopleurum a 
strong bristle is present. 
On the metanotum one observes an oblique transverse 
row of 5 strong and long bristles; a sixth bristle in the 
same row stands on the squamous appendix; the long ones 
alternate with shorter ones. Before this row an oblique 
one of 9 shorter bristles; still more orad is a more dorsal 
row of 4 shorter bristles. 
First abdominal tergite with three rows of bristles (8, 6, 
8). — The second to the fifth tergite each with two rows 
(7, 14), and with a black apical tooth near the dorsum, — 
The sixth and seventh tergite each with two rows (about 
5 and 14); the last moreover with two heavy antepygidial 
bristles, of which the lower one is about two times longer 
than the dorsal one. They stand together on an apical, 
darker coloured double cone, which is at the bottom of 
a wide incision in the free hindmargin or collar of the 
tergite. — Highth tergite small, ventrally-posteriorly rounded; 
its stigma with J-shaped peritrema, which reaches the median 
line of the back. — Ninth tergite for the greater part con- 
sisting of the almost semi-ellipsoidal senseplate, behind 
which there is, however, a sharply edged nail-shaped piece, 
which bears 5 bristles on its edge. — Tenth tergite or sub- 
Notes from the Leyden Museum, Vol. X XXI. 
