650 



MR. B. F. CUMMINGS ON LICE 



The text-fignre sliould be compared Avith those of Ibidacus and 

 Neoj)}t%[opterus (p. 672). Relatively, the calyx in the Philoptents 

 species is much wider across and shallower, and the chitin is of 

 an entirely different consistency, being dai'k brown, rather thin, 

 but very firm. 



The Philopteri of Birds of Prey. 



Future research may bring the Philopteri of the Owls and the 

 Birds of Prey into closer relationship — a result which, according 

 to modern views on the classification of birds, would lend no 

 support to the theory that the phylogeny of total obligate 



Text -figure 5. 



Philopterus. asturiims. Male repi-oductive system and copulatory apparatus. 

 1. ventral, X 100 j 2. dorsal, X 150. 



T. testis. V&. vesicula ssominalis. VD. vas deferens. BF. basal plate. 2>. ductus. 

 P. pai'timere. JSF. endomei'al plate. Pew. penis. 



pai'asites like Anoplura and Mallophaga will assist in the 

 unravelling of the phylogeny of their hosts, as ornithologists 

 present a solid front against the old position of the Owls among 

 the Birds of Prey. Between the two groups there is a strong 

 likeness, for example, in the male copulatory apparatus. 



Philopterus platystomus Nitzsch (5, p. 69). 



Females and larvte from Bateo erythronotus (King) (Argentine). 



