620 THE HON. N. C. ROTHSCHILD ON [May 26, 



ventral margins. The ninth and tenth segments resemble those 

 of P. colossihs. 



Length : S 3-3 mm., $ 5 mm. 



We have a long series oS" Mus assimilis from Emerald, Victoria, 

 Australia, collected by Mr. Edw. Jarvis during 1907. 



3. PiTGioPSYLLA GRAVIS, sp. n. (Plate XXX. fig. 14.) 



This species closely resembles P. rainhowl, except in the 

 genitaha. We have only one S ■ 



S . The eighth abdominal sternite (PL XXX. fig. 14) is very 

 large, as it is in rainboivi, and is densely covered with bristles as 

 in that species. But the long bristles which are placed along the 

 apical and dorsal edges of the segment are more numerous and 

 more slender than in rccinboivi. The upper margin of the eighth 

 sternite is gradually rounded, the ventral margin being straight. 

 The clasper (PI. XXX. fig. 14, CI.) is distally produced mto a 

 finger-like process (P), which bears a row of thin hairs at the 

 dorsal margin. The movable flap (F) is very large, being leaf- 

 shaped, with the pointed tip curved upwai-ds. The manubrium 

 (M) is curved dorsad, the apical portion being somewhat twisted. 

 The ninth sternite (PL XXX. fig. 14, IX. st.) is very broad. The 

 horizontal arm bears ventrally at the apex on each side five long 

 stout spines, of Avhich the most distal one is the longest. The 

 anal segment (= tenth) is long and slender, the anal sternite 

 bearing a pair of very long bristles at the apex. 



Length : d 4 mm. 



We have one c5' from Emerald, Victoria, ofi" Mus assimilis, 

 collected on 18th September, 1906, by Mr. Edw. Jarvis. 



4. Pygiopsylla laciniosus, sp. n. (Plate XXIX. fig. 10.) 



2 . As large as P. rainboivi. 



Thorax. — The pronotum bears two rows of bristles and a comb 

 of 19 spines. The pleura of the mesothorax have 7 or 8 bristles, 

 while the mesonotum bears four rows of bristles and some 

 additional ones in front of these rows on the back. The 

 metanotu^m has likewise four rows of bristles, but the first row 

 contains on each side only about 5 bristles, and there are dorsally 

 fewer hairs in front of this i-ow than on the mesonotum. The 

 epimerum of the metathorax has four irregular rows of bristles 

 (5, 5, 2 or 3, 3), the bristles of the posterior row being the longest. 

 There are also one or two additional short bristles in front of the 

 posterior row. 



Abdomen. — The first tergite is hairy all over. The other 

 tergites bear fewer bristles than in P. rai^iboioi and colossus, the 

 second and third having four rows and some additional dorsal 

 bristles, while the sixth and seventh tergites bear three rows and 

 a few bristles I'epresenting a fourth row ; the basal sternite has 

 no bristles on the sides, apart from a few extremely small hairs. 



