206 INSECTS AFFECTING DOMESTIC ANIMALS. 
Trichodectes timbatus Gervais. 
This species is referred to the Angora Goat, and is recognized as a 
distinct species by Giebel, Piaget, and others. Itis the species to which 
Professor Verrill thinks Dr. Packard’s capre belongs. Dr. Packard 
does not state upon which species of goat he found his specimens, but 
it is probable that they were from the common species, and if so, and 
inasmuch as his figure agrees fairly well with climax, 
it would seem as likely to belong there. 
In a recent bulletin from the Bureau of Animal In- 
dustry, Dr. Cooper Curtice describes these forms and 
endeavors to establish their specific identity. The 
principal points urged are a proportional difference 
in size between males and females, a difference in 
markings, and difference in size of eggs, but these are 
all variable, and the differences, as shown in the ex- 
Fig. 130.—Trichodectes cellent figures accompanying the report, are so slight 
doen ldtecDemg, that we are the more impressed with the view that 
they are only varieties, and unless it be shown that 
they do not interbreed nor survive if changed from one host to the other 
we should be inclined to use the two names as synonyms. 
THE LOUSE OF THE SHEEP. 
( Trichodectes sphwrocephalus Nitzsch.) 
s 
seve) 
ene 
Sa 
ah SEP Swe 
ee . apse =e are 
Pieerek LOL LI EISATy err ik Oe 
Fia. 131.—Trichodectes spherocephalus: a. female; b, antenna; c, d, dorsal and side aspeet of leg—all 
enlarged (original). 
Redi is credited with the recognition of this species, and following 
him Linneus described it under the name of Pediculus ovis, and later 
“Stet when #4; 
