162 INSECT PESTS OP BERRIES AND GRAPES 



covered with minute yellow tubercles or blue dots. There are 

 seven oblique yellow spots on each side the body, margined with 

 green. There is also a white stripe from the back of the head to 

 horn on the posterior end, on each side ; a series of seven dots along 

 the middle line, the color of dots varying from red to lilac and each 

 dot set in a yellow patch. It is two-brooded, and pinkish indi- 

 viduals are found in the second brood of caterpillars. 



Control. These conspicuous caterpillars are not numerous. 

 Hand-picking may be sufficient ; but spraying with arsenicals may 

 be resorted to if thought necessary. 



The White-lined Sphinx. This large, handsome moth (Deile- 

 phila lineata Fab.) may be seen about twilight, hovering before 

 flowers like a humming bird. 



Description. The ground color of the fore-wings is a rich 

 greenish olive, with a pale buff stripe along the middle of the wings 

 from the base to near the tip. There is a gray band on the margin 

 of the fore-wings, and the veins are margined with white. The 

 hind-wings are small, crossed by a wide, rosy band. There is a 

 line of white on each side of the body, from the head to the first 

 abdominal segment. The abdomen is olive, with white and black 

 spots. The wing expanse is about three and one-half inches 

 (Fig. 179). 



The caterpillars vary somewhat in color, but are often yellowish 

 green, with a row of prominent spots along each side. The breath- 

 ing pores on each side are margined with black or black with yellow 

 edges. 



Life History. The adult moth appears in the spring and again 

 in the fall, the insect being two-brooded. The caterpillars may be 

 found on the grape, or more commonly, perhaps, on turnip, buck- 

 wheat, and frequently on apple. When the caterpillar is mature, 

 it buries itself in the soil in a smooth cavity and changes into a 

 light-brown pupa. Winter is passed by the pupse of the second 

 brood. 



Control. This is not a serious pest, but the larvae are voracious 

 eaters when present. Hand-picking is probably as practical as 

 any method. They are held well in check by attacks of a tachinid 

 parasite. 



The Grape-leaf Skeletonizer or American Procris. The cater- 

 pillars of this moth (Harrisina americana Guer.-Men.) are grega- 

 rious, feeding with their heads all toward the margin of the leaf. 

 They are black and yellow in color and six-tenths of an inch long 



