216 MISC. PUBLICATION 734, U. S. DEPT. OF AGRICULTURE 



Vilar, J. M. dos Santos — Continued. 



1952 SUBSIDIOS PARA O ESTUDO DOS CEROPLASTES SPP. (iNSECTA-COCCIDAE) DE 



Portugal, (continuacao) Broteria21: 1-62, illus. (Concl.) 

 Conclusion of a detailed study of C. nisei and sinensis. 



Villanueva, F. E., see Uichanco, L. B., and Villanueva, F. E. 



VlSART, 0. 



1894 CONTRIBUZIONE ALLO STUDIO DELLE GLANDULE CERIPARE DELLE COCCINIGLIE 



(dactylopius citri risso e ceroplastes rusci) . Riv. di Pathol. Veg. 

 3 : 39-48, illus. 

 Histological description of wax ducts. 



1895 CONTRIBUZIONE ALLA CONOSCENZA DELLE GLANDULE CERIPARE NEGLI 



AFIDI E NELLE COCCINIGLIE. (SCHIZONEURA LANIGERA HAUSSM., APHIS 



brassicae l., dactylopius citri risso ). Soc. di Nat. in Napoli Bol. 

 (ser. 1) 8 (1894) : 112-116, illus. 

 Includes description of wax glands of D. citri. 



Vollenhoven, S. C. Snellen van, see Graaf, H. W. de, Six, G. A., and 

 Vollenhoven, S. C. Snellen van 



Vos, H. C. C. A. A. 



1930 de invloed van pseudococcus citri (risso) fern, op de plant. Baarn. 



Hollandia 81 p., illus. 

 Development, beak penetration, effect on plant. 



Voukassovitch, H., and Voukassovitch, P. 



1931 SUR LA MORTALITE DE LA COCHENILLE LECANIUM CORNI L. SoC. de Biol. 



[Paris] Compt. Rend. 106: 691-694. 

 Observations on the mortality under various conditions. 



Voukassovitch, P. 



1930 SUR LA POLYPHAGIE DE LA COCHENILLE LECANIUM CORNI L. SoC. de Biol. 



[Belgrade] Compt, Rend. 104: 1065-1067. 

 Discusses observations on natural infestation and results of larval 

 transfers to various hosts. 



1930a SUR CERTAINES VARIATIONS DANS LE COMPORTEMENT DE LA COCHENILLE, 



lecanium corni L. Soc. de Biol. [Belgrade] Compt. Rend. 104: 

 1068-1070. 



Voyle, J. 



1884 REPORT ON THE EFFECTS OF COLD UPON THE SCALE INSECTS OF THE 



orange in Florida. U. S. Dept. Agr., Div. Ent Bul. 4: 70-73. 



Reports on various experiments. 



1884a EXTRACT FROM CORRESPONDENCE. DESTRUCTION OF SCALE INSECTS BY 



cold. U. S. Dept. Agr., Div. Ent. Bul. 4: 75. 

 Note on an experiment. 



Wahl, B. 



1933 DIE SAN jose-laus (aspidiotus perniciosus) und deren auftreten 

 in europa. Internatl. Ent. Cong. (Paris 1932) 5, (pt. 2) : 693-698. 



Walczuch, A. 



1932 studien an coccidensymbionten. Ztschr. f. Morph. u. Okol. der Tiere 



25 (4) : 623-729, illus. 

 Describes, discusses, or mentions symbionts for about 33 coccids repre- 

 senting 19 genera and 5 subfamilies; presents 6 groups of symbionts; 

 discusses these in relation to coccid classification. 



Walker, F. 



1852 LIST OF THE SPECIMENS OF HOMOPTEROUS INSECTS IN THE COLLECTION OF 



the BRITISH museum, PT. 4. London, Newman, 1188 p. (1065-1091). 

 Lists 134 coccids including 9 described as new, in 10 genera, with cita- 

 tions for described ones and general locality for each. 



