1024 



Mr. r. J. ok'Tlepp on the 



The body is attenuated in its anterior third, but posteriorly hns 

 a more or less uniform thickness ; it is terminated by a short 

 and obtusely roimded tail, forming about 1/1 00th of the total 

 body-length. 



The vulva is slightly protuberant, and is situated at about the 

 junction of the first and second quarters of the body. It leads 

 into a coiled vagina 2 mm. long by 80 jx thick ; the egg-chamber 

 is about 800 ju long by 300 ju thick and the common trunk about 

 640^11 long by 112/^ broad ; its posterior end divides into two to 

 give rise to the two uteri. 



The eggs are oval and thick-shelled, measuring 45 ju by 26 ju 

 broad, and are fully embryonated in utero. 



Male. 



The two males were respectively 22 and 28 mm. long, with a 

 thickness of 870 and 950^. They are attenuated in their 

 anterior half and the posterior end is curved ventralwards. 



Text-figure 9. 



200fj. 



Pliysalo'ptera muris-hrasiliensis Dies. 

 A = Anterior extremity of male. 

 B = Caudal extremity of male. 



The bursa is somewhat heart-shaped with a drawn-out tip, the 

 lateral expansions being much better developed in their anterior 

 half. Of the four pairs of pedunculated papillse three pairs are 

 pre-anal. There are six pairs of ventral paired papillge and two 

 unpaired papillse ; of these one pair and an unpaired papilla are 

 pre-anal, the latter being nearer the anus. The first and second 

 pairs of post-anal papillas are small and are situated in a row 

 immediately behind the anus; pairs 3, 4, and 5 are equidistant 

 from each other, and are situated respectively at the 2nd, 

 3rd, and 4th sixths of the tail; they are all larger than the 

 first two pairs. The unpaired post-anal papilla is about midway 

 between the 2nd and 3rd pairs, and is about twice as large as the 

 latter. 



