70 
The Non-Combed Eyed Siphonaptera 
very robust, the fifth segment (PI. Ill, fig. 10) especially being long and 
broad. In the foretarsus this segment is as long as the four other 
segments together, its lateral bristles as well as the claws being long 
and strong. The second midtarsal segment is nearly twice the length 
of the first. The proportional lengths of the mid- and hindtarsal 
segments are: 
Segment 
First 
Second 
Third 
Fourth 
Fifth 
Midtarsus : 
c? 
18 
31 
18 
9 
40 
¥ 
19 
37 
20 
12 
48 
Hindtarsus : 
<r 
50 
44 
27 
14 
46 
60 
50 
30 
14 
50 
Modified segments, • The eighth sternite bears a row of about 
12 bristles on both sides together, the ventral bristles of this row being 
smaller than the lateral ones, there being also some small hairs in front 
of the row. The clasper is triangular (PI. VI, fig. 7), with the apex 
rounded off. There are 3 long stout bristles close together below 
the apex and a thinner and paler one above them at the apex, there 
being also a number of bristles and hairs along the dorsal edge of the 
clasper. The finger (F) is long and slender, almost reaching to the 
subapical bristles of the clasper. The finger bears 2 long thin bristles 
near the apex, besides a number of thin hairs. Where the finger joins 
the clasper there are 4 bristles (3,1) at the ventral margin of the clasper. 
The manubrium of the clasper is slender. The ninth sternite (ix. st.) 
is elongate boat-shaped, bearing a number of bristles in the apical half 
along the ventral margin, two of them being somewhat thicker and 
longer than the others.— $ . There are 3 small bristles above the stigma 
of the eighth tergite on each side. From the stigma downwards this 
segment bears a row of 12 to 14 bristles, the row being widely 
interrupted beneath the centre. There is a row of about 12 bristles 
along the apical edge on the outside, five or six of the apical bristles 
being close together, and a row of about 12 on the inside. On the 
outside of the segment, near the base, there is a patch of 3 to 5 small 
bristles. The stylet is cylindrical, or nearly so, bearing a long apical 
bristle, but no subapical notch. 
Length. </ 2'6 to 2'9 mm., $ 2'6 to 37 mm. 1 
We have 2 </ and 2 $ $ from the southern portion of the Province 
of Buenos Ayres, from Muletia septemcincta, collected by the late Dr 
1 Some of the mounted specimens are much extended, which partly accounts for the 
difference in length. 
