( 325 ) 



out in the specimen) is strongly cnrveil. The ninth sfernitc is somewhat bone- 

 shaped (fig. 24, ir. t.). 



The eighth tergite of the female is rounded at the apex (tig. 2'i). It bears 

 an obliqne series of three bristles below the stigma, four long and six smaller 

 ones at the obliqne nj]per ajiical edge, two to four laterally near the apex, and 

 a row of three at the obliqne ventral ajjical margin. 



Length, <S, 221 mm. ; ¥ , 2-4 mm 



We have received from Mr. William Foster (in whose honour this species 

 is named) of Sajiucay, Paraguay, one ?nale and two females taken from Molosxiis 

 bo7mriensis on August 6th, 19U0, and another yewreVe from the same locality from 

 Nijctinomus laticaudatus. 



In. Ceratopsylla distinctus spec. nov. (PI. X. fig. 27.) 



Head. — Both flajts of the head, the posterior portion of which is longer than 

 the anterior part, are long, acuminate, and somewhat curved. The hairs and 

 bristles of the head are long and stout. 



Thorax, — The pronotal comb consists of twenty long teeth. The mesouotum 

 bears numerous hairs extending from the base to the posterior row of long 

 bristles. There are two long slender teeth in front of its apex. The metanotum, 

 which is much longer than it is apically broad (when viewed in optical section), 

 is rather hairy on the back, and bears one short strongly chitinised tooth laterally 

 at the a]iical margin. The metathoracic ejiimerum is much higher than it is 

 long, its stigma-bearing edge being nearly vertical. It bears three hairs proximally 

 of the stigma, two below the stigma, two more farther back, and one at the 

 apical angle. 



Abdomen. — The anterior edges of the abdominal tergites are incrassate, 

 appearing deep brown in optical section. The first three tergites have one apical 

 tooth laterally, and bear (besides the posterior row of bristles) two rows of hairs, 

 and on the back some additional hairs. The first tergite is especially hairy. The 

 apical bristle of the seventh tergite is very long. 



The sternites of the fourth, fifth and sixtii abdominal segments have six or 

 seven bristles on each side. The seventh sternite, moreover, bears numerous 

 smaller iiairs in addition. 



Legs. — The anterior femur bears four or five lateral bristles. The foretibia 

 has, on the outer side, two irregular and one regular rows of hairs. The first 

 segment of the foretarsns is five times as long as it is broad. 



The longest apical bristle of the hindtibia is only one-third the length of thp 

 fir.>t tarsal segment. The tarsi are very long, and bear numerous stout and very 

 short hairs. On the mid- and hindtarsus along the edge of the first segment 

 there are about fifteen pairs of very short stout bristles. The first segment of 

 the hindtarsus is as long as the hindtibia, being longer than the head. 



Modified Segments. — The eighth tergite oi the female is rounded at the apex ; 

 it bears a number of hairs which are distributed as shown in the figure (fig. 27). 

 The conical process of the anal tergite is only a little longer than it is broad. 



Leugth, 2'8 ram. 



A m\^\Q female specimen of this species was taken at Villa Rica, Paraguay, 

 on ()ctob(!r 31st, 11K)(I, by Mr. William Foster. The host nnfortnnately is not 

 stated. 



