A SELECTED BIBLIOGRAPHY OF THE COCCOIDEA 217 



Walker, F. — Continued. 



1858 LIST OF THE SPECIMENS OF HOMOPTEROUS INSECTS IN THE COLLECTION OF 



the British museum. Supplement. London, Newman, 369 p. (304- 



306). 

 Lists 13 coccids including 3 described as new, in 6 genera; Drosicha 

 n. gen. 



Walsh, B. D. 



1866 ANSWERS TO [INSECTS IN THE ORCHARD BY J. S. HOUGHTON.] Pract. Ent. 



2: 31-32, illus. 

 Describes "Coccus? harrisii Walsh." 



[Walsh, B. D., and Riley, C. V.] 

 1868 A new bark louse on the osage orange. Amer. Ent. 1 : 14, illus. 

 Presents Lecanium maclurae and L. acericola, n. spp. 



Wassilieff, M. E. 



1891 quelques notes par rapport aux males du lecanium hesperidum l. 

 (In Russian.) Soc. des Nat. Varsovie (Warsaw) Trav., Compt. Rend, 

 de la Sect. Biol. 2 (6): 10-12. 

 Includes descriptive information on male stages. 



Weber, H. 



1928 ZUR VERGLEICHENDEN PHYSIOLOGIE DER SAUGORGANE DER HEMIPTEREN. 



Ztschr. f. Vergleich. Physiol. 8: 145-186 (162-165), illus. 

 Mouth parts of Pseudococcus described. 



1930 biologie DER hemipteren. Berlin, Springer. 543 p. 

 Numerous references to various coccids in discussions. 



1935 cocciDAE — schildlause. Biol, der Tiere Deut. 38 (31) : 286-355, illus. 

 Summary discussions of classification, feeding, habits, anatomy and 

 histology, symbionts, reproduction, etc. 



Webster, F. M. 



1899 odour of san jose scale, aspidiotus perniciosus. Canad. Ent. 31 : 4. 

 A note on its existence. 



1900 the native home of the san jose scale. Ent. Soc. Ontario Ann. 



Rpt. 30: 55-56. 

 Believes it native to Japan. 



Webster, F. M., and Burges, A. F. 



1902 A PARTIAL LIST OF THE COCCIDAE OF OHIO. U. S. Dept. Agr., Div. Ent., 

 Bui. (n.s.) 37: 109-113. 

 Lists 71 coccids with collection data. 



Webster, R. L. 



1915 EFFECT OF LOW TEMPERATURE ON THE OYSTER-SHELL SCALE (LEPIDOSAPHES 



ulmi linn.) Jour. Econ. Ent. 8: 371-375, illus. 

 Report on field observations in Iowa. 



Wehrle, L. P., see Nichol, A. A., and Wehrle, L. P. 



Welsch, I. 



1937 DIE MASSENVERBREITUNG der pflaumenschildlaus (eulecanium corni 

 bouche march.) und ihre ursachen. beitrag zum parasitologi- 

 schen befalls wechsel der pflanzen in abhangigkeit vom boden. 

 Landw. Jahrb. 84: 431-492, illus. 



An ecological study showing that heavy attacks occur on weakened or 



unhealthy hosts. 



Werner, W. H. R. 



1931 OBSERVATIONS ON THE LIFE-HISTORY AND CONTROL OF THE FERN SCALE, 



hemichionaspsis aspidistrae sign. Mich. Acad. Sci., Arts, and 

 Letters Papers 13: 517-540, illus. 

 Description, detailed life history; discussion of study techniques. 



