K. Jordan and N. C. Rothschild 
5 
6. Club of antenna symmetrical, the proximal segments not detached on the 
hinder side and not sloping backwards (PI. II, fig. 12). Genal process with a number 
of bristles.6. Genus : Parapsyllus. 
(Ill) Club of antenna segmented all round, symmetrical (PL II, fig. 4). Hind- 
coxa without comb. Fifth tarsal segment with at least 5 lateral bristles, besides the 
subapical hair (PL IY, fig. 2). 
The three genera which come under this heading are not at all closely related to 
one another. 
7. Antennal groove open behind, the genal process being short and broad 
(PL II, fig. 4). Abdominal tergites with one row of bristles, except the first 
tergite, which bears two. Claws of tarsi with basal tooth ; first midtarsal segment 
shorter than second. Two receptacula seminis in $.7. Genus: Coptopsylla. 
8. Antennal groove open behind. Abdominal tergites with very numerous 
short bristles besides the long postmedian ones. First midtarsal segment longer 
than the second.8. Genus : Goniopsyllus. 
9. Antennal groove closed behind. Abdominal tergites with one row of bristles, 
there being a few additional bristles on the first tergite. Claws of tarsi without 
distinct basal tooth. Antepygidial bristle absent in both sexes. No stylet in J. 
9. Genus : Lycopsylla. 
1. Genus : Pulex Linnaeus (1758). 
Pulex, Linnaeus (1758, p. 614, partirn, type of name: irritans); Geoffroy (1762, 
p. 615, partim); Fabricius (1775, p. 732, partirn); Barbut (1781, p. 329, t. 18, 
fig. 5, copy of Geoffroy’s fig.) ; Schellenberg (1798, p. 45) ; Latreille (1809, 
p. 366, n. 543, partim) ; Wood (1821, p. 124, partim) ; Swainson and Shuckard 
(1840, p. 393, partim) ; Bouche (1832, p. 503) ; Newman (1851, p. 143) ; 
Haliday (1856, p. 9, t. 1); Kolenati (1859, p. 65); Bielet (1881, p. 6) ; Boden 
(1882, p. 70, Pulex feeding on larva of a Tineid); Tyrrell (1884, p. 86); 
Dimmock (1884, p. 186, fleas eaten by earwigs); Blathwayt (1895, p. 345, t. 16); 
Wagner (1898, pp. 555, 575, partim); Baker (1904, p. 378, partim); Baker 
(1905, p. 128, partim). 
Head. Frons without notch. Antennal groove closed behind, the 
genal process reaching almost to the lower posterior angle of the 
occiput. There is a strong internal incrassation from the base of the 
antennal groove to vertex. The second segment of antenna transverse, 
bearing several long bristles at the apical edge; club short, round, solid 
on anterior side, the segmentation being barely indicated on this side, 
while the first three segments are deeply separated on the hinder side. 
There are a few very small hairs on the anterior side. Eye large, 
a little pointed below. Two bristles beneath the eye and a third at the 
oral edge. The anterior angle of the genal edge projecting somewhat 
downwards, and usually bearing a small tooth. Mandibles broad, short, 
and densely serrate. Rostrum shorter chan the maxillary palpus, 
