( 619 ) 



The longest apical bristle of the first hindtarsal spgment reaches nearly to 

 the middle of the third segment, and that of the second segment almost to the ai)ex 

 of the fourth. 



modified Segments. — The cJasper of the c? (PI. X. fig. 31, (!1.) is large, and 

 bears numerous hairs along the edge. The finger (f) is very small. The ninth 

 sternite is slightly dilated before the middle, obtuse at the ape.x, and bears a number 

 of hairs along the ventral edge (ix. st.). 



The eigiith tergite of the ? (PI. IX. fig. 26) has a few hairs above the 

 stigma, about eight to ten lateral ones farther down, and a row of short and 

 rather stout ones at the apex, there being on the innersido of the segment a 

 dense apical patch of hairs. 



Length : c?, 1-5 mm. ; ?, 1-V( mm. 



We have thirteen examples of this insect : — 



5 cJc?, (!oast Hills, Chile. Burrowing Rat. Mr. .1. A. Wolifsolin. 



'* ^ + ' TJ )1 )> J) )? T) )) 



~ (?c?, Valparaiso, ,, „ „ 



13. Pulex corfidii spec nov. (PI. IX. fig. 27; X. fig. 33). 



? . Head. — Tlie front of the head bears a pointed tnberculo directed backwards 

 an<l projecting from a groove (PI. X. fig. 33). There is a row of three bristles in 

 front of the eye, the upper one standing at the antennal groove and the lower one 

 behind the maxillary palpus. In between these bristles there are two shorter ones. 

 Above the eye there is a number of short hairs. The genal edge bears a series of 

 eight or nine bristles (which are nearly all broken off in my single sj)eciraen). On 

 the hinder part of the head there are a number of bristles along the antennal 

 groove, and a complete subapical series of eight. The short hairs above the antennal 

 groove stand in an almost regular row, but are not numerous. The head is 

 punctured from the eye-bristles upwards (PL X. fig. 33). The rostrum is much 

 shorter than the forecoxa. The labial palpus consists of four segments only, tlie 

 fourth segment being as long as the two preceding ones together. 



Thorax. — The prothorax bears two rows of bristles, and one or two bristles 

 in front of them on the back. There is also a hair-like subapical dorsal s])ine on 

 each side. The mesonotum bears three rows of bristles and a subapical series of 

 five hair-like spines. On the metanotum there are two rows of bristles. The 

 epimerum of the mesonotum bears four bristles. The metathoracical epimerum 

 bears twelve bristles in two vertical slightly curved rows (7.5) and three short 

 hairs behind the second row ; the third bristle of the first row is nearer the liase 

 than the others. 



Abdomen. — The abdominal tergites have two rows of bristles, the first tergile 

 bearing two or three additional bristles on the back. The bristles in each row are 

 very numerous, there being as many as thirteen or fourteen in the second row on 

 each side on the middle segments. The first tergite bears an apical comb of 

 fifteen spines on the two sides together. On the second tergite there are five 

 spines, and on the third two. There is one long apical bristle on the seventh tergite. 

 The stigma is small, and stands just in front of the anterior row of bristles and 

 above the third bristle of the second row on the middle segments. The first 

 abdominal sternite bears several hairs at the ventral edge, and a curved row on 

 the sides, with a number of additional hairs in front of tliis row. The sternites 



