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 

 Muscidae and to the genus Lyperosia, sp. (?). The species is probably 

 new. 



SUB-GEOUP B. ANIMALS INJURIOUS TO MAN'S 

 VEGETABLE PLANTATIONS. 



Section I. 

 Animals Injurious to Agriculture. 



Scale Insect {Mytilaspis cifricola, 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, Eiji, 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 llosaceaj. In 

 Jamaica, Cockerell records it on the Murraya. Its original home was 

 probably the West Indies or South America. It occurs on leaf, fruity 

 stems and twigs. 



This scale is about ^th 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 ^th 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. 



