344 Grosses Classification and Structure of the Bird-lice. | April, 
Grosse has never been able to find the palps of the first maxille 
which Nitsch ascribes to Liotheide. Nitsch figures them in 
i Trinotum conspurcatum, but this can scarcely be correct, for he 
places the four-jointed papillz on the blade near its anterior bor- 
der. In Tetrophthalmus the palps belong not to the first but to 
the second maxilla. The same is true of Menopon pallidum, Col- 
_ pocephalum zebra, a Lemobothrium from Gypogeranus serpenta- 
rius, and a Trinotum from the swift, and probably is the case with 
all the genera and species. 
f Second maxille (unterlippe)—These are flat, fused, bounding 
E the mouth posteriorly. They consist, in Liotheidæ, of two parts 
The basal part (mentum, 
mt) represents the coalesc- 
ing stipites and squamz 
St of normal first maxille, 
and bears the four-jointed 
labial palps. The upper 
part is the ligula or glossa 
(g) corresponding to the 
inner blade [lacinia]. Lat- 
erally on the ligula are the 
paraglosse (jf), corre- 
sponding to the outer 
blade [galea]. A chitin- 
ous band limits the glossa 
where it bears the para- 
glossa, as if the parts of © 
Pin: 7s: Sai makilia of Nimes: x both had coalesced. 
Fic. 8.—Second maxillæ of Ze¢rophthaimus chilen- Rudow seems to, have 
E Botham, rer 9—Second maxille of Læmo- mistaken the antenna for 
the labial palps. Melni- 
kow overlooked the labium, and erroneously compared the pro- 
ducts of the cesophageal intima with the proboscis of Pediculina, 
ie consequence of this false comparison referring the Mallophag@ 
_ to Rhynchota. 
i The labium of the Philopteridæ has no palps (Fig. m It is 
ly triangular, with rounded angles, and is sometimes very 
small, as in the genus Kapeita; thè mentum being smaller than 
