REVISION OF THE SARCOPSYLLID AE 63 
First Segment 
Second Segment 
Third Segment 
Fourth Segment 
Filth Segment 
Mid tarsus, j ? 
I 1 
11 
6 
16 
Hind tarsus, $ 9 
28 
18 
10 
x 9 
Modified Segments. — $. The eighth tergite is small, while the sternite is very 
much enlarged. The sternite is peculiar in shape, bearing a very narrow and deep 
sinus as shown in the figure (PI. II, Fig. 17). The proximal edge of the clasper 
between the ventral manubrium (M 2 ) and the dorsal manubrium (M 1 ) is rounded. 
The edges of the large flap P' are practically straight. Close to the juncture of the 
finger (F) with the clasper there are three bristles. The external portion of the ninth 
sternite consists of three lobes, as shown in the figure (PI. II, Fig. 17). 
°_. The eighth tergite is very large, the sternite being very much reduced. 
This tergite (PI. I, Fig. 11) bears a row of bristles near the apical edge, the edge 
being shallowly sinuate. There are also bristles on the inner side of the segment, 
these bristles being short and very numerous near the ventral apical corner. The 
anal segment bears behind the pygidial plate on each side ten or twelve long bristles, 
besides some short ones. 
Length : 1*4 mm. ; 1*8 mm. 
We have : — 
2^9- Received from the Vienna Museum, cotypes of psitiaci. 
5 J $, 120 9 9- » » n Aviary in the Zool. Gardens in London, oft various birds. 
October 1903. (E. Ockenden). 
27 9 9- » >' » Aviary of a Zoological Garden in Holland. Received from Prof. 
Dr. O. Taschenberg. 
10 9 ? • » » La Plata, off Columba livia. Received from Dr. Carlos Berg. 
4. Hectopsylla pulex 
(PI. I, Fig-. 4, 10 ; PL IV, Fig. 31) 
Rhynchopsyllus pulex Haller, Archiv f . Naturg. XL VI. p. 82. t. 4. (1880) (Brazil ; off Molossus 
spec). 
Rhynchops^lla pulex, Taschenberg, Die Flohe p. 57. t. 1. rig. 6, 6a, 7 (1880) (partim). 
Hectopsylla psittmi, Baker (non Frauenfeld, i860), Proc. U.S. Nut. Mils. XXVII. p. 375. 434 
(1904) (partim ; ' Ceylon ' error loci). 
The $ of this species is not known. We have a series of which agree 
exactly with a typical specimen of H. D/t/ex, received from Dr. Dutoit, the son-in-law 
of the late Dr. Haller. 
Head. — The frons and occiput are evenly rounded together (PI. I, Fig. 4). 
There is no trace of an angle on the frons. The occiput bears three bristles above 
