128 



PLUM,. PEACH, AND CHERRY INSECTS 





inch long, nearly hemispherical; yellowish when young, becoming 

 dark and shiny when older. The hard part of this and allied 

 scales is really a part of the insect and not separable from the 

 insect, as is the case with the oyster-shell scale, San 

 Jose scale and some others. 



Control. The life history and control is practi- 

 cally the same as in the preceding species. 



The Dog Day Cicada. This is a well-known 

 insect in many latitudes (Cicada tibicen Linn.). 

 It is seen and heard during August and September 

 and is commonly called " locust." The upper side 

 of the body is black, the head and thorax being 

 mottled with olive green. The large, transparent 

 wings are strongly veined; the more prominent 

 veins have a greenish tinge. The under side of 

 the body is coated with a whitish powder. The 

 legs are greenish (Fig. 150). Not much is 

 da?Scada?'7i5ig- known regarding the larvae. Probably both 

 & er -) the larval and pupal stages resemble those 



of the periodical cicada or so-called " seventeen-year locust." 

 Like other species, the adult often wounds the small limbs of 

 the cherry and deposits eggs in the wounds. 



INSECTS ATTACKING THE LEAVES OF CHERRY 



lo Emperor Moth. The male of this striking moth (Hyper- 

 chiria io Linn.) is of a deep yellow color, with faint purple-brown 

 markings. There are two oblique, wavy lines near the outer margin 

 of the fore-wings and a zigzag line near the base. There are also 

 other markings and blackish dots on the fore-wings. The hind- 

 wings are of a deeper yellow color, shaded with purple next to the 

 body and with a large blue eye-spot in the center. The wing 

 expanse is about two and one-half inches. 



In the female, the hind-wings are somewhat like those of the 

 male. The fore-wings are somewhat duller in color, and the wing 

 expanse is from three to three and one-half inches. 



The larvae. The dark-colored larvae keep together while young 

 in small swarms, and when moving march in a procession, as it 

 were. Later they lose this habit and spread, maturing late in the 

 summer. When full grown, they are two and one-half inches 

 long, approximately, pale green, the green becoming paler along 

 the back, and there is a broad, dusky-white stripe on each side 

 margined with lilac. The body of the larva is covered with 



