198 - INSECTS AFFECTING DOMESTIC ANIMALS. 
been taken in this country, a fact which may be due to the little atten-_ 
tion that has been given to collecting these insects here, rather than to 
their absence. 
I have taken it from the chicken at Ames, Iowa, and from the char- 
acters which it presents I believe that Packard’s Goniocotes burnettit 
was described from a female of this species. 
According to the figures given by Piaget, it differs decidedly from 
the variabilis, with which it is most likely to be confused, in having the 
head rather narrowed in front instead of inflated, and the body is much 
stouter. 
Besides occurring upon the common domestic fowl it is said to occur 
upon pheasants of certain species. 
GUINEA FOWL LIPEURUS. 
(Lipeurus numide Denny. ) 
Denny described this species under the name of Nirmus numida, but 
Piaget refers it to the genus Lipeurus. 
It is characterized by Denny as “livid yellow, shining and smooth; 
head subpanduriform, lateral margin black; abdomen with two fuscous 
interrupted dorsal fascie.” 
As he states that he found ‘tivo specimens,” it would appear not to 
have occurred in great abundance. 
LOUSE OF THE SHELDRAKE. 
(Lipeurus tadorne Denny ;= Lipeurus lacteus Giebel.) 
Denny described this species from specimens taken from the shel- 
drake, and cites also a manuscript name of Leach, Ornithobius tadorna, 
which he assumes to be the same and which applied to specimens in the 
British Museum. The species was later described by Giebel with the 
name lacteus, though he at the same time quotes Denny’s name without 
stating any reason for the change. 
Piaget states that he prefers the name chosen by Giebel to that of 
tadorne in order to avoid as much as possible the names of birds upon 
which the parasites have been found. If this principle were carried out 
it would involve the change of hosts of names applied to members of 
this group of insects, and as it is directly opposed to the well-established 
principle of priority we believe the name applied by Denny should be 
restored. 
The insect is characterized by a milky-white color, the surface smooth 
and shining, the head, thorax, and abdomen with eon marginal spots; 
itis elongate in form and ae head heart-shaped. 
Professor Comstock cites it as occurring also upon the goose, but upon 
what authority we are unable to say, as the authorities consulted mention 
it only as a parasite of the sheldrake. 
