PYGIOPSYLLA ROBINSONI. 199 
short, bluntly rounded and provided with two hairs. The „fin- 
ger” is like that of ahalae, but its bristly armature somewhat 
modified. Externally it has about 18 dorsad directed small 
hairs and a row of about 14 ventrad directed hairs, in- 
creasing caudad in length and strength; four of them are 
obviously strong and black. The top of the finger, directed 
downward, is also provided with a few small hairs. Obviously 
this „fnger” does not clasp with the clasper, but with the 
ninth sternite! 
Rostrum (mandibles + labial palps) long, reaching the 
protrochanter. Maxillae sharp. Maxillary palps formula 4, 
1 = 2, 3. Labial palps formula 5, 1, 4, 3, 2, symmetrical. 
Foreleg. Externally: coxa polystich, with strong bristles. 
— Trochanter with one anterior bristle; femur with one 
proximal anterior bristle, two distal anterior ones, about 
ten posterior ones, the distal one heavy, exteriorly about 
eight bristles. — Tibia with 3 anterior bristles in the distal 
half, two thick ones in the anterior distal angle, six posterior 
notches each with two stout bristles; moreover about 12 
external bristles. — Tarsus formula 5, 1, 2, 3, 4; all the 
joints well covered with bristles. Last joint with one subbasal, 
two submedial and four subapical strong spines, four lateral 
ones of which the first is stronger; planta hairy. Internally: _ 
trochanter with two bristles near the anterior one; femur 
with one bristle in the proximal half; tibia with one in the an- 
terior distal angle; tarsus, last joint with 3 lateral and 
one medial apical one. 
Midleg. Externally: coxa with distinct demarcation be- 
tween basi- and telocoxa; the latter with a row of about 
7 small bristles in the distal half of the anterior edge, of 
which the distal one strong and double; parallel to this 
row a marginal row of about 5 of the same shape; quite 
distally and posteriorly, before the well-rounded notch, two 
bristles. — Trochanter with one bristle on the anterior edge. 
— Femur with two bristles on the proximal anterior protu- 
berance; three on the anterior distal margin; about 12 
on the posterior edge, of which the distal one heavy; 
Notes from the Leyden Museum, Vol. XXXI. 
