ENSECTS OF THE GBEEKHOUSE. 



311 



times do much harm by sucking the sap from the buds 

 and tender shoots. To destroy them, use kerosene emul- 

 sion upon plants that will stand it, or in its place spray 

 with whale-oil soap solution, or fir- tree oil. 



ALETKODBS {White Flies). 



Allied to the aphides are the Aleyrodes or "white 

 flies," as they are usually called, which sometimes appear 

 in large numbers in the greenhouse and do considerable 

 Injury. The perfect insects are winged in both sexes, 

 but instead of being vertical, as in the aphis, their wings 

 are outspread. In the larvae and pupae, there is a strong 

 resemblance to young scale insects, and they injure the 

 leaves by puncturing them and sucking the sap. The 

 eggs can often be found in large numbers on the under- 

 side of the leaves. Soap is not entirely effectual, and it 

 will be better to rely upon kerosene emulsion and simi- 

 lar remedies. 



fuller's rose beetle {Aramigus Fulleri). 

 A few years ago great harm was done to roses m 

 greenhouses by Puller's Eose beetle (Fig. 107, a), which 

 was often spoken of as "the rose bug." The mature 



no. 107. FtTLLBB'S KOSE BEETLE. 

 a, adult ; b, larva ; c, pupa. 



insect is about half an inch in length, and of a gray 

 color. It conceals itself upon the stem or under the 

 Igpives, from which it eats senji-circular pieces, and wbw 



