Pomona College Journal of Entomology 405 



antennae and the legs and other characters are quite similar to corni, but 

 the derm pores furnish the most evident character for the species *••■.♦ 

 The pores are small, clearly defined, and regularly arranged, but they do not 

 show a tendency to arrange themselves in broken rows perpendicular to the 

 margin as in L. corni." Ec. Jr. Ent. Vol. II, p. 442. 



Bggs — Are ovoid in shape, yellowish-white in color, and arc deposited be- 

 neath the female scale in great numbers. 



Larvae. — Pale green or yellow in color, with many ridges ruiuiing across 

 the main axis of the body and one ridge running on the dorsal median a.xis. 

 There are two characteristic hairs or spines on the anal lobes (one on each) 

 which are half as long as the body. 



Host Plants. — This scale has become quite a pest in some localities. On 

 the peach and apricot it may do as much damage as the fruit scale, while on 

 some of the ornamental trees it is most serious. In California it has been 

 found on Apricot, Peach, Plums, Prunes, Pears, Apples, Ash, Locust, English 

 Walnut, Grape, Rose, Osage Orange, Birch, and various deciduous ornamental 

 trees. 



Habitat. — It is the present belief that this insect is a native of Mexico 

 and was introduced to its present localities on imported plants. It is not 

 known outside of North America. Its present distribution is as follows : 

 California (all parts of the State), New Mexico, Arizona, Mexico, New York, 

 Massachusetts, Canada. 



Remedies. — The first work was done on this pest, in Los Angeles, during 

 the year 1888, by D. W. Coquillett, who used the Resin Spray with good 

 results. 



FORMULA FOR RFSIN SPRAY USED BY COQUILLETT 



Resin 30 lbs. 



Caustic soda (70% ) 9 lbs. 



Fish oil '. 4>4 pints 



Water to make 100 gallons of spray. 



As is well known this spray is very effectual against many of the coccids 

 and was early used as a remedy for all scale insects by the State Board of 

 Horticulture of this state. It is, however, somewhat difficult to mix anct 

 quite expensive. In my work on Lecaniums I have found the carbolic acid 

 emulsion to be very effective. It is easy to make and inexpensive. The 

 formula for mixing is as follows : 



Whale oil soap 40 lbs. 



Crude carbolic acid 5 gals. 



Water to mix 40 gals. 



For use dilute 1 to 20 or if there is a very bad infestation dilute 1 to 15 of 

 water. 



I 



First heat the 40 gallons of water in a large iron kettle over a steady 

 fire. Dissolve the 40 pounds of soap in the hot water. After it is thoroughly 

 dissolved, add the 5 gallons of carbolic acid. Let cook for five or ten minutes 

 and stir thoroughly. The resulting stock solution will be ready for use 



