Pony Flies and Scale Insect. 
133 
Pony Flies. 
(Lyperosia, sp. ?; 
Mr. E. E. Green forwarded some small flies that were causing 
annoyance in the pony-breeding establishments in Ceylon. They 
were examined by Mr. Austen and found to belong to the family 
Muscidse and to the genus Lyperosia, sp. (?). The species is probably 
new. 
SUB-GBOUP B. ANIMALS INJURIOUS TO MAN’S 
VEGETABLE PLANTATIONS. 
Section I. 
Animals Injurious to Agriculture. 
Scale Insect ( Mytilaspis citricola, Packard) on Orange 
Trees in Monte Video. 
Dr. E. S. Miller, E.N., sent from Monte Video a scale insect 
affecting the orange trees there and asking for information as to 
destroying it. This scale proved to be Mytilaspis citricola, Packard. 
It occurs in the United States, West Indies, China, Brazil, Southern 
Europe, Ceylon, Fiji, etc. It has been recently introduced into South 
Africa. Fruit from Southern Europe, Canary and Madeira is usually 
infested. 
Its food plants are all citrus fruits and probably all Rosacese. In 
Jamaica, Cockerell records it on the Murraya. Its original home was 
probably the West Indies or South America. It occurs on leaf, fruit, 
stems and twigs. 
This scale is about Jth of an inch long, and is about three times 
as long as it is wide, and like the Apple Mussel scale in outline, the 
anterior end being narrow and the posterior broad and rounded, the 
whole scale somewhat curved. 
The colour is variable, some are dull purplish, others almost 
brown. Beneath the scale is white ; this lower white portion coming 
away with the scale retains the insect or eggs within. 
The male scale is almost straight and y'^tli of an inch long. 
The eggs, which vary from twenty-five to seventy under each 
scale, are white. All the specimens examined from Monte Video had 
eggs within them. 
