( 55 ) 



ventral Lairs and a ventral pair of bristles. The stylet is cyliiulrioal, tapers at 

 the tip, and is about four times as long as it is broad. The anal tergite is 

 densely hairy. 



J^cqs, — The hiudco.xa Viears posteriorly 3 subapical bristles. The liiiidfemnr 

 has 2 bristles on the outer side near the ape.x, and 1 on the inner side. The 

 hindtibia bears on the outer surface two rows of about 15 bristles in all, and :i or 3 

 bristles on the inner surface. Two of the apical bristles of the second hindtarsal 

 segment e.xteud beyond the third segment, find the longest one even reaches 

 to the ape.x of the fourth segment. The longest apical bristle of the first 

 segment reaches the ape.x of the second. The jiroportions of the segments are 

 in the midtarsus 27, 20, 13, 8, 18, and in the hindtarsus 47, 27, 15, 10, 19. 



Modified SeyiHCiUs. — The seventh sternite bears no sinus. The eighth tergite 

 (PI. Vlll. fig. 5) has 5 long bristles along the ventral and apical margins, of 

 which the third and fifth are the shortest ; above the fourth and fifth of 

 these, bristles there is a patch of 9 short but stout bristles. Just below the 

 stigma there are 2 very long bristles, and farther down 1 somewhat shorter one. 



Length : 2-7 mm. 



We have one ? off " Fox," collected at Palo Alto, California, in July 1895 ; 

 received from i)r. G. H. F. Nuttall. 



4. Ischnopsyllus scitulus spec. nov. (PI. VIII. figs. 1, 2). 



Nearest to /. aefji/ptiiis Rothsch., Eiit. Mo. Mag. (2) xiv. p. 83. t. 1. tig. 1 

 (1903) (Cairo),* but abundantly distinct. We know only the S of the new 

 species. The dorsal parts of the occiput, the thorax, and the abdomen are strongly 

 chitiuised. 



Head. — Resembles the head of air/i/pfius, but the bristles are very much 

 stronger (PI. VIII. tig. 1). The frontal jiortion bears a row of short bristles 

 ])arallel to the frontal outline, as in aaji/jitins. The genal process is strongly 

 chitiuised, its colour being in parts brownish black. This black jiortion surrounds 

 at the anteunal groove an elongated transparent space which is probably a 

 vestigial eye. Above this space there is a very strong curved bristle, and higher 

 ui> a number of smaller bristles. The genal process ends in a small point. The 

 occiput bears above the aiitenual groove a row of about 10 stout bristles, of 

 which the lowest three or four are placed close together at the lower posterior 

 angle of the head. On the sides of the occiput there are three transverse 

 rows of stont bristles besides the apical row, each of these transverse rows 

 containing 2 or 3 stont lateral bristles, there being moreover several small dorsal 

 bristles. The first segment of the antenna is longer than the clnb. The first 

 segment of the maxillary jialpns is the longest, while the second and the fourth 

 are of ecjnal length, and the third is the shortest. The rostrum does not reach 

 to the ajiex of the maxillary palpus ; the fourth segment of the rostrum is 

 nearly as long as the first three together, and the fifth only about as long as 

 it is broad. 



Thorax. — The jironotum has a comb of 22 spines, and bears, besides the 

 usual postmedian row of bristles, several rather stout hairs further frontad. The 



* Oudeman's in Tijdxrhr. KiU. p. 102 (I'JOH) proposes the genus ChiroptrrojisyUn for tlic reception 

 of /. arijyiitliix, eli.irarterisiug ,tbis " genus '' l)y the possession of a kind of comb on the epiniernni of 

 the metatliorax and tlie small size of the first abdominal tergite. This comb is absent from the new 

 species. 



