92 



THE MONTHLY BULLETIN. 



ORTHEZIIN.E (Subfamily). 



The members of this subfamily are soft-bodied insects without 

 special protection. The females are characterized by their long white 

 egg-sacs at the posterior end of the body as shown in Fig. 71, and their 

 long legs. The bodies are also slightly covered with a white wax. 

 Throughout the entire life cycle the females are very active. But one 

 species, Orthezia insignis, is of economic importance in California. 



THE GREENHOUSE ORTHEZIA. 



Orthezia insignis Dougl. 

 (Fig. 71.) 



General Appearance.— Body ochreous to dark green, covered with 

 plates of Avhite waxy secretion, which are extended posteriorally in a 

 large rectangular plate, to hold and protect the eggs and young. 

 Length 1.5 mm. Males are small and darker in color with two long, 

 white wax filaments posteriorally. 



Fig. 71. — The greenhouse orthezia (Orthesia insignis 

 Dougl.). Immature forms at left (after Britton) ; adult 

 females at right (after Craw.). 



Life History.— There are several generations a year. The eggs of 

 the female are carried in the white egg-sac fastened to the posterior 

 end of the abdomen. The young females vary from yellow to green 

 in color. As they grow the white covering forms around the edges 

 and as a distinct middle longitudinal ridge. When full grown the 

 bodies are completely hidden. • All stages are active. 



Distribution. — In greenhouses throughout the entire State and 

 country. 



Food Plants.— Is especially destructive to Colcus sps. It also attacks 

 Amaranthus sp.. Chrysanthemum, Lantana, Vcrlena, Ipomoea, Thun- 



