GIGLIOLI, ON PARASITICAL INSECTS FROM CHINA, 19 
Antenne greatly modified and cheliform in the male, 
haying the first jomt much longer and thicker than the 
rest; in the female they are straight and simple. Last 
segment of the abdomen notched behind in the male, trun- 
cated and notched, or wholly cleft. 
The species of this genus have been observed on diurnal 
Raptores, Galline, Gralle, Natatores, and Cursores; they 
are of large size. 
Lipeurus Diomedee, Dufour. (Pl. 18, figs. 1, 2.) 
Pediculus Diomedee, Fabricius.* 
This large and interesting species has been known to 
naturalists a long time as inhabiting the common albatross 
(Diomedea exulans). After Fabricius, Dufour described it+ 
at length, together with two other lice peculiar to the same 
bird. The most remarkable fact relating to my specimens 
is, that they come from the Diomedea brachyura, which inhabits 
only the Pacific north of the line, while the D. exulans 
is only found south of the equator. Thus it is very strange 
that two of the parasites inhabiting these birds should be 
identical, for the following species is also found in both. 
The L. Diomedee is -°,ths of an inch in length; its form is 
elongated, and it is of a blackish-chestnut colour. The body is 
nearly glabrous; only a few hairs are scattered about the fore 
part and sides of the head, and on the sides of the abdomen. 
The head is rather narrow, elongated, and quadrilateral ; 
in the male deeply notched behind; in the female it has a 
more triangular shape, and is less notched behind. Dufour 
describes the head of the female as white, margined with 
chestnut-brown. In my specimens the white is reduced to 
a median line, rather larger than that on the head of the 
male. 
Antenne in the female (fig. 1) shorter than the head, 
nearly straight, and composed of five cylindroid joints. 
Those of the male (fig. 2), in form and insertion, resemble 
more mandibules or mazilli-pedes than antenne. Redi 
first drew attention to this remarkable fact in his Pulexr 
pavonis.t 
In the male ZL. Diomedee the antennz consist, as in the 
female, of five joints, and are about -),th of an inch in length. 
* Joh. Christ. Fabricii, ‘ Entomologia Systematica,’ tom. iv, p. 421, 
Hafmie, 1794. He describes it thus :—*‘‘ Capite obtuso albus, abdominis 
lateribus nigris.” 
+ L. Dufour, “ Description et Iconographie de trois espéces du genre 
Philopterus, parasites de Albatros; ” ‘Ann. Soc. Ent. de France,’ vol. iv 
p. 669, figs. 1 and 2, 1834. 
i F. Redi, ‘Exp. circa Gen, Ins.,’ tab, 14. 
