Notes on Chiastopsylla, Rothsch. 11 
beyond the middle, with two external finer bristles beneath, set near the 
edge and parallel with it. There is also at least one stout bristle on the 
posterior edge. 
C. rossi, g, closely resembles C. nwme in the 9th tergite. In both species 
the “finger” is long and narrow, though the hairs appear to be longer in 
C. rossi. ‘The two species, however, can be easily separated. In C. nwme the 
8th sternite is “finger-like,” being developed only ventrally. In C. rossi the 
corresponding portion of the sclerite is cuneate and bears a few hairs. Above 
the wedge is a crescentic sinus, and above this again the sternite is produced 
into a short, broad lobe. The appendages of the 9th sternite differ in the 
two species. In C. nwme@ they are roughly diamond-shaped, terminating in 
a long point with frayed edges, in the case of the upper two. In C. rossi only 
the lowest is elongate; the uppermost is short and broad, while the middle 
one is deeply indented. In C. nume the scales overlap from above down- 
wards; in C. rossi, in the reverse order. As one would expect, the male of 
C. rossi is somewhat more heavily armed with teeth on the tergites than is 
the female. The metanotum bears 4-6 teeth, and the first four tergites 2-4, 
2-4, 2, 2, respectively. In general chztotaxy the male resembles the female. 
Length, 1°6 to nearly 2 mm. 
REFERENCES. 
1. Roruscuitp, N.C. Further Contributions to the Knowledge of the Siphon- 
aptera, Wov. Zool., pp. 637-639, Nos. 27, 28, pl. xii. fig. 58, pl. xiii. 
figs. 59, 61, 63, 65 (1904). 
2, Waterston, J. A New Ceratophyllus from South Africa, #.M.M., ii, 
pp. 271-273, No. 547, pl. v. figs. 3, 4 (1909). 
3. RoruscHitp, N.C. Chiastopsylla, a new genus of Siphonaptera, Hnt., p. 105, 
No. 563 (1910). 
(Issued separately, 15th March 1913.) 
