856 NEW: YORK STATE MUSEUM 
_ Chief accessible article: Felt, E. P., state ent. 14th rep’t, ’98. 
(Mus. bul. 23) p. 213-16. 
176 Cottony maple tree scale insect, Pulvinaria innu- 
merabilis Rathy. Principal food plants: maple, elm, grape. 
Treatment: Spray young in July with kerosene emulsion or 
whale oil soap solution. A powerful stream of cold water or 
‘a stiff brush will dislodge many females. 
Chief accessible articles: Lintner, J. A., state ent. 6th rep’t, 
°90. p. 141-47; Felt, E. P. Fisheries, game and forest com. 4th 
rep’t, sep. ’?98. p. 29-31; Howard, L. 0. U.S. dep’t agric. div. ent. 
Bul. 22, n..s. 00. p. 8-16. 3 
177 Putnam’s scale insect, Aspidiotus ancylus Putn. 
Principal food plants: maple, elm, currant, fruit trees. 
Treatment: rarely injurious. 
Chief accessible articles: Lowe, V. H. N. Y. agric. exp. sta. 
Bul.-136. 797. p. 593; Felt, E. Ps N: Y. state mus: Bull 46701 p: 
326-30. 
178 Aspidiotus dictyospermi Morg. A greenhouse 
Species occurring on Areca lutescens. 
179 Cherry scale insect, Aspidiotus forbesi Johns. 
Principal food plants: cherry and apple trees. 
Treatment: Spray infested trees in winter or early spring 
with a contact insecticide. 
Chief accessible article: Felt, E. P. N. Y. state mus. Bul. 46. 
°01. p. 330-32. : 
180 Ivy scale insect, Aspidiotus hederae Vall. Prin- 
cipal food plants: common on ivy and a number of other green- 
house plants. : 
Treatment: Spray infested plants with an ivory or whale oil 
soap solution. | 
Chief accessible articles: Lintner, J. A., state ent. 11th rep’t, 
796. p. 208-4; Felt, E. P. N. Y. state mus. Bul. 46. ’01. p. 333-36. 
181 Aspidiotus lataniae Sign. A greenhouse species 
infesting palms. 
182 European fruit tree scale insect, A's p idiotus ostreae- 
formis Curt. Principal food plant: plum. 7 
