214 THE CANADIAN ENTOMOLOGIST. 



THE COCCID^ OF THE IVY. 



BY GEO. B. KING, LAWRENCE, MASS. 



In Entomological News, Vol. V., 1894, p. 210, Prof. Cockerell cited 

 all of the Coccids known to infest ivy ( Hedera). Since then other species 

 have been found, and with his consent I have prepared the following 

 notes for publication. Leaves of Hedera helix sent to Prof. Cockerell 

 from Brazil, coll. Dr. F. Noach, May, 1898, proved to be infested by 

 ChrysompJialus diciyospej-mi, Morgan. And Mr. A. Hempel, of St. 

 Paul's, Brazil, sent C. aonidum, L. Just recently he wrote me that 

 C. dictyospermi, var. jamaicensis, Ckll. (minor, Berlese), was received 

 by him from Lord Walsingham, infesting ivy at Cannes, France. 

 Aspidiotus rapax (camel/ice) was found by E. E. Green on ivy in 

 Ceylon (Coccida? of Ceylon, p. 44). Dactyiopius ciiri, Risso., was found 

 at Kew Gardens, England, on a variety of ivy called Hedera arnurensis 

 (Newstead, Ent. Mo., May, 1897, p. 73). The following have been found 

 by me at Lawrence, Mass.: Aspidiotus Crawii, Ckll., on ivy in a 

 greenhouse, and must have been there for some time, as the vine is an 

 old one, supposed to be about 20 years old. Lecanium /lesperiditm, L. , 

 is frequently found on ivy in greenhouses, but not in sufficient numbers to 

 cause much alarm. Dactyiopius citri, Risso., and Aspidiotus hederce, 

 Vail., seem to be the most troublesome, sometimes covering the entire 

 leaves of the vine, and as the leaves are used very extensively in making 

 up wreaths and other floral designs, their presence in greenhouses causes 

 very much damage. A list of the species now known to be found on ivy 

 is appended below : 



I 



2 



3 



4 



5 

 6 



7 

 8 



9 

 10 

 1 1 



Phenacoccus hederce. Sign., Hab. France. 



Lecanium maculatum. Sign., Hab. France. 



Lecanium hesperidum, L., Hab. France and N. America. 



Asterolecaniicvi hedercf, Licht., Hab. France and Italy. 



Dactyiopius citri, Risso., Hab. England and N. America. 



Aspidiotus rapax (camellice), Hab. Ceylon. 



Aspidiotus hederce, Vallot, Hab. Algeria and N. America. 



Aspidiotus Crawii, Ckll., Hab. N. America. 



Chrysomphalus aonidum, L., Brazil. 



Chrysomphalus dictyospermi, Morg., Brazil. 



Chrysomphalus dictyospermi, vzx. Jamaicensis, Ckll., France. 



