220 
The Aberystwyth Area 
Good farming, and the adoption of reasonable precautions should 
go far towards the elimination and avoidance of the dangerous diseases 
classed as red water whether tick-borne piroplasmosis or due to a plant 
(or plants) as yet unrecognised. 
PSOROPTES COMMUNIS, var 0 VIS. 
Sheep Scab, once the bane of the local sheep industry, is now well 
under control as the result of compulsory dipping. It is doubtful 
whether this pest is now really endemic within the Area surveyed, 
most of the cases that occur being imported during the autumn move¬ 
ments. 
Sa R (JOP TES M VTA NS. 
Scaly leg of fowls. Only observed once or twice. 
Blood-Sucking Flies. 
Although aware that certain species were at times very abundant 
in the Survey Area, I identified only a few prior to the summer of 1916, 
when special attention was given to the group. 
The hay season was particularly hot and dry (following a wet time) 
and all classes of farm stock suffered severely, the working horses in 
particular, and I several times observed as many as five species about 
the same horse. 
The Home Farm, Crosswood, was used for special observation though 
others were visited. Local farmers and labourers agreed that never 
before had so many biting flies been seen. Coastal farms certainly 
suffer less than those inland and near woods. 
I. Ceratopogon sps. One or more species of this genus are a serious 
plague in many parts of the Area. I was severely attacked in the 
Llyfnant Valley and about Glandyfi in the extreme north of the Area 
during the evenings in July 1915: about Llanrhystyd Road, three 
miles south-east of Aberystwyth, as early as April 18th, in 1914, and 
at Crosswood (in the south) during July and August 1916. Specimens 
from this latter locality were carefully examined and did not agree with 
either of the species figured by Austen 1 , but was near pulicarius. Pro¬ 
bably several species are present. 
II. Simulium variegation Meigen. I obtained nine specimens from 
the nose and jaws of a mare at Crosswood on July 20th, 1916, and about 
1 British Bloodsucking Flies. 
