K. Jordan and N. C. Rothschild 
85 
The species are South American and Antarctic, one species ( longi- 
cornis) going with its host (Penguin) northward to Australia. 
Key to the species. 
a. Labial palpus consisting of 4 segments ..Species No. 4 
Labial palpus consisting of 5 segments .b 
b. Proximal segments of abdomen with apical spines .Species No. 3 
Proximal segments of abdomen without apical spines .c 
c. Mesonotum without thin bristle-like subapical spines .Species No. 1 
Mesonotum with thin bristle-like subapical spines .Species No. 2 
(1) Parapsyllus longicornis Enderl. (1901). 
(PI. II, fig. 12; IV, fig. 5; VII, fig. 3.) 
Pulex longicornis (1901, p. 553, t. 34, figs. 8, 9, 12, S. Paul Is., off Eudyptes 
“ chrysocome ”). 
Parapsyllus longicornis Enderlein (1903, p. 261, fig. 2, t. 39, figs. 13, 14, 16, 17, 19, 
21); Baker (1905 a, p. 144). 
Head. The frontal tubercle is large (PI. II, fig. 12), being situated 
close above the frontal oral corner of the head. There is a row of 
bristles beneath the eye along the genal edge. The antennal groove 
is very large in the there being in both sexes a distinct internal 
incrassation of the skeleton from the base of the antennal groove 
upwards. The second antennal segment bears a row of long bristles 
along the apical edge, the bristles being especially long in the $, some 
of them reaching to the apex of the club in this sex. The rostrum 
extends to the trochanter, the labial palpi consisting of five segments. 
Thorax. The mesonotum has no subapical spines. The epimerum 
of the metathorax bears a row of 3 or 4 bristles running from the 
stigma downwards, and 1 to 3 additional bristles representing an 
anterior row. The episternum of the metathorax is longer in a vertical 
direction than horizontally. There is no external suture between this 
episternum and the metanotum. 
Abdomen. There are no apical spines on the tergites. The 
tergites bear each two rows of bristles, the anterior row being more 
or less incomplete on the posterior segments of the while the $ 
has some additional bristles on the sixth and seventh tergites. The 
basal sternite bears a number of small hairs on the side, the other 
sternites have a postmedian row of bristles and in front of it several 
small hairs, which are more numerous in the $ than in the </• 
