90 
The Non-Comhecl Eyed Siphoriaptera 
three species of Parapsyllus, the frontal tubercle, moreover, being placed 
farther away from the frontal oral comer than is the case in the other 
species. The bristles, too, at the genal edge are more numerous. The 
rostrum does not reach to the apex of the forecoxa, the labial palpus 
consisting of only four segments, of which the last is much the longest. 
The internal incrassation of the skeleton from the antennal groove 
upwards is vestigial in the </, and quite absent from the £. 
Thorax. The thoracical tergites have each two rows of bristles, the 
mesonotum bearing an additional row, besides a row of subapical long- 
slender spines. The metathoracic episternum is longest in a vertical 
direction. The epimerum of the metathorax has two rows of bristles 
(5 to 7, 4 or 5). 
Abdomen. The proximal tergites bear short apical spines, the comb 
consisting of 15 or 16 spines on the first tergite. The tergites have 
each two rows of bristles, there being some additional small bristles on 
the _ seventh tergite in the $. The bristles of the rows are very 
numerous, there being in the posterior row of the central segments some 
30 bristles in the $ and about 24 in the </. The sternites have a row 
of about 16 bristles on the two sides together, with additional bristles in 
front, the basal sternite bearing a row of small bristles on the side with 
some additional hairs before it. 
Legs. The bristles situated anteriorly on the outer surface of the 
broad and rounded hindcoxa are very numerous. All the femora and 
tibiae bear also very numerous bristles on the outside. These bristles 
are more or less arranged in rows, being more numerous in the </ than 
in the $, the tarsi also bearing numerous bristles on the outer surface. 
There is a row of bristles on the inner side of the mid- and hindcoxae. 
The first midtarsal segment is a little longer than the second. The 
fourth hindtarsal segment is nearly twice as long as it is broad. 
Modified segments. </• The clasper is triangular, with the 
ventral margin strongly rounded (PI. YI, fig. 6). The manubrium (M) is 
very broad, becoming gradually narrower and curving upwards apically. 
There are 4 long and several short bristles at the ventral and distal 
edges of the clasper (Cl). The finger (F) is small and conical, being 
slightly curved and bearing a number of small bristles. The ventral 
portion of the ninth sternite (ix. st.) is almost straight, being slightly 
rounded ventrally and bearing a number of bristles on the distal half.—- 
$ . The apical edge of the seventh sternite slopes upwards. The eighth 
tergite bears two rows of small bristles above the stigma. There is a 
row of about 10 bristles running from the stigma downwards and 
