The Yerba Santa Mealy Bug 
(Pseudococcus yerba-santae nu sp.) 
E. 0. ESSIG 
SECRETARY STATE HORTICULTURAL COMMISSION, SACRAMENTO, CAL. 
FEMALES 
General Appearance. 
(Fig. 1) The general outward ap- 
pearance, including size, shape, color and vestiture, furnishes 
the only reliable data for the recognition and description of 
mealy bugs. The species under discussion does not differ from 
the other known species to a great degree, but enough so to war- 
rant its being considered new to science. The size is average, 
Figure 1. The yerba santa mealy bug (Pseudococcus yerba sante n sp.) Slightly 
enlarged. (Original.) 
being from 1.8 mm. to 2.2 mm. in length and nearly half as wide. 
The shape is oval oblong, being slightly narrower than the typical 
mealy bugs. The body color is light or pinkish. The contents of 
the bodies are easily removed by boiling in KOH, the skin be- 
coming colorless and transparent—the legs and antenne remain- 
ing amber. The white waxy covering is just thick enough to hide 
the body color and appears velvety. The segmentation of the 
body is usually plainly visible. The wax filaments around the 
