140 



THE DICTIONARY OF GARDENING, 



Pinna conti; 



FIG. 171. CONE OF PINUS BUNGEANA. 



some do considerable injury. But, on the whole, the 

 moths seldom do serious harm to Conifers in gardens or 



PiXLUS continued. 



Pines and other Coniferce are very liable to the attacks 

 of numerous forms of Aphides, some of which feed on 

 the needles, and others on the branches or in the young 

 buds. The latter, for the most part, belong to the 

 genera Chermes and Lachnus, both of which usually 

 have a coating of filaments like a small tuft of white 

 cotton, secreted by, and protecting, the body; and they 

 are, therefore, rather easily detected on the bark. The 

 two genera are easily distinguished from one another, 

 since Lachnus has short, stumpy honey-tubes on its 

 back near the end of the body, and one of the veins 

 of the front wing that run to the hind margin has two 

 branches; while in Chermes, the honey-tubes are not 

 present, and the veins of the front wings are all un- 

 branched. The number of species is too great to permit 

 of a description being here given of each one that is 

 injurious to Coniferce ; but one producing a gall resem- 

 bling a miniature Pine-apple, is referred to under a 



FIG. 172. PINUS CKMBRA. 



pleasure - grounds, though they frequently do much 

 damage in forests. The Sawflies are more to be 

 dreaded than the moths. 



separate heading (see Spruce Pine-apple Gall) 

 Several kinds of Psylla also feed on Coniferce. In 

 none of the Conifers would the result be worth the 



