46 

 The Longulus Scale 



This is a new variety, the origin of which no one seems to know, 

 and which infests only the citrus trees in a small territory in one 

 section of the County. It is described as somewhat like to the 

 Soft Brown Scale in some stages, and has been sometimes so classed. 



It seems to rear but one brood per year which appear anywhere 

 from May 1st to August 20th. The young are much like those 

 of the Soft Brown Scale, but a little larger and more yellow at 

 first, and after settling, become more flat, a greenish color, and 

 more transparent than the Soft Brown Scale. 



They first settle on the tender twigs and leaves, mostly on the 

 under side. By January the most of them move onto the twigs 

 and small branches and change to a mottled gray color. As they 

 grow, they become more convex, until at maturity they are a 

 long oval in shape and about one-fourth of an inch long at their 

 largest, with many much smaller, but producing young and appear- 

 ing to be adults. When close together, they often lap in regular 

 order like fish scales. 



After the young are all hatched, the mother turns dry and brown, 

 loosens her hold on the tree and often drops off, leaving a white 

 powdery residue on the branch; very few old ones remaining on 

 the tree over winter. They are never found on the fruit. 



They seem to require fumigation somewhat earlier than the Black 

 Scale, say from July 15th to Sept. 1st for best results, and sprays 

 have proved useless. There seems to be very little work of para- 

 sites on this scale. 



Pear Thrips 



(Euthrips pyri) 



Citrus Thrips 



(Euthrips citri) 

 Bean Thrips 



(Euthrips fasciatus) 



The thrips are very small, active, hopping and flying insects, 

 probably native to California. There are many kinds, of which 

 we will speak of a few. 



The Orange Thrip is dark yellow, with a life term of about 20 

 days, hence are constantly being born and dying. They attack the 

 tender leaves and twigs of the orange early in the season, and 

 later the fruit, and the fruit is scarred in a peculiar manner. A 

 ring is formed around either or both ends and the lines radiate 



