PARASITOLOGY. 15 
Genus and Species tiene Argas Miniatus. 
. Ornithodoros Megnini. 
Family... ....... Ixodidae ......... ‘i 
Genus and Species... ccocecccceseeees Rhipicephalus Sangui- 
neus., 
Ixodes Ricinus. 
Margarapus Annulatus. 
Boophilus Australis. 
Dermacentor Electus. 
Dermacentor Reticula- 
tus. 
Amblyomma America- 
num. 
ORDEP pcs cccas sss: Linguatulida 
Genus and Species 
..Linguatula Rhinaria. 
Trichophyton Tonsur- 
ans. 
Achorion Schoenleinii. 
Achorion Keratophagus. 
SaccharomycesAlbicans. 
Actinomyces Bovis. 
INSECT PARASITES. 
The life cycle of most insect parasites is divided 
into four stages, viz.: oval, larval, pupal and adult. 
The oval stage is the first stage—the egg. 
The larval stage is the second stage—the stagein 
which the insect is a worm. 
The pupal stage is the third stage—that metamor- 
phosis passed through in a dirt or membranous sac ; 
the cocoon. 
The adult is the fourth stage—the mature state. 
Some insect parasites do not pass through the oval 
stage. 
Those parasites belonging to the class insecta, 
anatomically speaking may be divided into three 
parts, viz.: The head, the thorax and the abdomen. 
The head is provided with two eyes, two antenna? 
(feelers) and the mouth parts. 
