78 The Non-Combed Eyed Siphonaptera 
segment. The “finger” of the clasper is one-fourth shorter than in 
bohlsi and roberti, and its bristles are placed closer together in the centre 
of the ventral margin. The manubrium is slenderer than in the allied 
species. The ninth sternite of the </ is very robust (PI. YU, fig. 6). 
It is rounded at the apex, not bearing any bristles at the extreme tip, 
while the ventral bristles placed on the inner side close to the apex 
are very numerous. One of the bristles of the outside is longer 
than the others, as is the case in R. bohlsi. 
With this (/a $ was sent which may belong to the same species, 
though it does not apparently differ from the $ of R. bohlsi except that 
the first midtarsal segment is slightly shorter, as is the case also in the 
</ of bernhardi. 
One </ and one $ off' a species of Diclelphys ; San Bernardino, 
Paraguay, May 1906, collected by Herr Karl Fiebrig. 
(9) Rhopalopsyllus platensis spec. nov. 
(PI. VII, fig. 10.) 
We have only one $ of this insect. 
The rostrum reaches to the trochanter, being a little longer than in 
the $ $ of the allied species. The maxillary palpus is also longer, the 
segments measuring 20, 26, 14 and 26 respectively. The pleura of the 
mesothorax bears 6 bristles. The hindcoxa has only 2 bristles 
posteriorly at the apex. There are 24 bristles on each lateral surface of 
the basal abdominal sternite, besides the bristles which are situated at 
the ventral margin. The hindfemur bears on the outside a row of 
9 or 10 bristles, and on the inside a row of 8. The bristles on the out¬ 
side of the hindtibia are less numerous than in the allied species. The 
long bristle situated in the fourth incision of the hindtibia reaches far 
beyond the apex of the tibia. The longest apical bristle reaches beyond 
the tip of the first tarsal segment, the longest bristle of this segment 
extending beyond the apex of the second segment, while the corresponding 
bristle of the second segment extends close to the apex of the fourth 
segment. The bristles on the seventh abdominal sternite and the small 
lateral ones which stand on the eighth tergite (PI. VII, fig. 10) basally 
to the lateral row are more numerous than in R. bohlsi. 
One $ off Ctenomys spec, from La Plata, collected by Dr Spegazzini, 
and received from the late Dr C. Berg. 
