216 
The Aberystwyth Area 
Asgaris suilla. 
This large worm is commonly met with in the local slaughter houses, 
and is said to be more abundant in pigs that have had their liberty 
and have had the run of fields and yards prior to feeding, than in those 
that have always been penned and artificially fed. 
Ixodidae. 
Five species of ticks have been collected, namely: 
1. Ixodes ricinus (L.). 
2. I. liexagonus Leach. 
3. I. canisuga Johnston. 
4. I. unicavatus Neumann. 
5. Dermacentor reticulatus Fabricius. 
Of these, I. ricinus, as the undoubted carrier of bovine piroplasmosis 
is easily first in importance, and is also extremely abundant throughout 
the Area, especially among rough herbage, near woodlands, etc. Females, 
in all stages of engagement are frequently seen in abundance upon 
cattle and I have commonly taken them upon farm dogs, generally 
above the eye or about the ear, and I have on several occasions found 
the male in copula in such situations. 
This species also occurs upon sheep, and I have handled considerable 
numbers in varying parts of the Area in order to note their presence, 
since shepherds and flock owners almost invariably confuse ticks and 
“keds” (Melophagus ovinus) and their evidence could therefore very 
seldom be relied on. I have only taken I. ricinus from mountain sheep 
and never abundantly. During mid-June, 1915, I found nymphs 
attached to the noses of about one-quarter of a large flock that had been 
grazing the natural pastures north-east of Talybont (900--1500 feet), 
but only one adult female was found, attached to the ear. Females 
were also taken several times from fox and cat, and specimens were 
sent me from hare and squirrel, these latter were nymphs and were 
obtained near Goginnan. 
I have several times taken larvae from the skin of human beings 
(including myself) and I have had a number of complaints from agricul¬ 
tural workers, fern cutters, and others. 
In March 1914, Messrs Hutchings, the Aberystwyth taxidermists (to 
whom I am indebted for many ticks and other interesting specimens) 
