1900.] 



157 



NOTE ON CHRTSOMPHALUS DICTYOSPERMI, A SCALE-INSECT 



FEOM CANNES. 



BT PROF. T. D. A. COCKERELL, F.Z.S. 



I have just received from Lord Walsingham some specimens of 

 Chrysomphalus dictyospermi, sent to him by Lord Brougham and Yaux, 

 with the statement that the scale is infesting ivy and orange at Cannes.' 

 The form of the species sent is that described by Berlese as C. minor, 

 but I am quite unable to separate it from O. dictyospermi var.Jamai- 

 censis, Ckll. ; and it appears to be also quite identical with the female 

 Diaspispinnulifera, Maskell, f rom Fiji, though the male scale referred 

 to that insect belongs to something else. The synonymy will there- 

 fore be : — 



Chrysomphalus dictyospermi (Morgan), var. PmNULiPERA (Maskell) 

 Diaspis pinnulifera, Mask., Trans. N. Zealand List., xxiii, 1890, 

 p. 4, ? (not $). Aspidiotus dictyospermi, var jamaicensis, Ckll ' 

 Canad. Entom., xxvi, 1894, p. 129. Chrysomphalus minor, Berlese,' 

 Riv. Pat. Veget., iv, 1895, p. 340. 



The occurrence of the insect in the neighbourhood of Cannes has 

 already been recorded by Dr. Paul Marchal in Bull. Soc. Entom 

 France, 1899, p. 291. 



G. dictyospermi (including varieties pinnulifera, arecce, and mangi- 

 fer<e) is probably a native of tropical Asia, but is now very widely 

 distributed, and infests many plants. I copy a few records from my 

 card-catalogue to illustrate these facts : Campinas, Brazil, on leaves of 

 Hedera helix, coll. F. Noack ; on rose, Tabasco, Mexico, coll. Townsend • 

 on orange, Oaxaca and Cuautla, Mexico, coll. Koebele ; on peach' 

 Oaxaca, Mexico, coll. Koebele; on Areca lutescens in greenhouses' 

 CoIumbus,.Ohio, coll. J. S. Hine ; on Pandonus in greenhouse, Santa 

 Fe, ^ew Mexico, coll. Ckll. ; on Pinus, Oaxaca, Mexico, coll. Koebele • 

 on Areca catechu, Trinidad, West Indies, coll. J. H. Hart • on Ficus 

 in greenhouse, Denver, Colorado, coll. Gillette; on rose! Castleton 

 Gardens, Jamaica, coll. Campbell ; on Cycas revoluta, Kandy Ceylon 

 coll. Green. All these records relate to specimens seen by me. 



N. M. Agr. Exp. Sta., 



Mesilla Park, New Mexico, U.S.A. : 



March, ZQth, 1900. 



