CLASSIFICATION AND DESCRIPTION OF COMMON iNbJsCib ijJ5 



Greenhouse Orthezia {Orthezia insignis Dougl,). — An ochreous to 

 green insect, covered with plates of waxy secretion. Occurs on many 

 plants (Fig. 8i). 



Aspidistra Scale {Hemichionaspis aspidistm Signoret). — Female 

 scale Ko inch long; oviparous; light or dark brown with exuviae 

 brighter; thin and delicate; somewhat oyster-shell shaped. Male 



Fig. 87.- 



-Front of head and cauda of aphids: a, Microsiphum cralagi; b, Myzus 

 (apterous); c, Myzus (alate); d, Phorodon. 



scale white, 3-ridged, slender, edges parallel. Occurs on Boston fern, 

 aspidistra, orange, orchids, Davallia (Figs. 85 and 86). 



Control. — On indoor plants for Mealy Bugs use Black Leaf 40 

 (i to 400) and soap (4 lb. to 50 gal.); for Hard and Soft Scales use 

 whale-oil soap (i lb. to 2 gal.) or a dilution of some good miscible oil to 

 which Black Leaf 40 has been added. 



