646 



MU. B. P. CUMMINGS ON LICE 



as that figured by Snorlgrass (1, pi. xiii. figs. 7, 8, (fc 9) for Colpo- 

 cephalam Jiavescens and E arymetop^ds taihrus. In P. cursor, on 

 account of the swelling out and rounding of the two separate 

 sacs of which the vesicula is composed, it approximates to the 

 form of the vesicvia in P. cehlebrachys (text-fig. 2). Note the 

 relatively small size. 



Philopterus ceblehrachys (text-fig. 2). — In outline the vesicula 



Text-ficvure 2. 



Philoptej'us cehleh-achys. Male reproductive sj'stem and copulatory apparatus. 



X 100. 

 T. testis. VS. Vesicula semiualis. VD. vas deferens. D. ductus. UP. basal 



plate. FR. forked rod. a. transverse piece. P. paramere. JEP. endoineral 



plate. 



resembles Minerva's helmet. In between the rounded posterior 

 " horns," which sweep backwards and outwards, the dihctus enters 

 and swells out at once into an oval form. 



Male Copulatory Apparatus of the Otol Philopteri. 



Philopterus rostrat^ts (text-fig. 3). — Distinguished by the 

 unusually long parameres in proportion to the basal plate, a 



