ON THE CULTURE 



sickly* and generally a great number of yellow 

 transparent spots may be seen all over them. On 

 the least neglect in destroying them, they will in- 

 crease innumerably, and so beset the lower parts of 

 the leaves next the stem of the plant (where they 

 are most numerous) with scales, as nearly to touch 

 each other. And as they pierce that part of the 

 leaf immediately under the scale with their proboscis, 

 they thereby not only draw out the nutritious juices 

 themselves, but also destroy the tubes through which 

 they flow. The upper parts of the leaves being 

 thus deprived of their nourishment, fall down, and 

 consequently die. 



But I have never found that these insects at- 

 tack the roots of the Pine, as has been frequently 

 asserted. 



Some persons also assert that the last described, 

 and the following species of insects, are one and 

 the same ; that they breed under the scales, and 

 afterwards descend to the roots of the Pine, and 

 when grown to maturity, are the large white mealy 

 Pine-bug. But the error of this opinion is clearly 

 evinced from hence, that some hot-houses are in- 

 fested with the one, and not with the other. 



3. The white mealy crimson-tinged Insect. 1 * 

 This species also has all the characters of a Coccus, 

 but in all probability belongs to another subdivision 

 of that genus of insects. For whereas the two 

 former species are undoubtedly oviparous, this 



b This insect, as well as the former, has hitherto remained 

 unnoticed by entomological writers. 



