THE MONTHLY BULLETIN. 



155 



Control. — Though the various members of this family are very 

 common, it seldom happens that the young are seen in any great 

 numbers, but individuals are often met with. The work is usually 

 evident long before the worms are detected. Because of their large 

 size and characteristic work they are comparatively easy to locate and 

 upon these facts are based the method of hand picking as a control 

 measure. The worms are either gathered and destroyed or simply cut 

 in two with a pair of scissors. 



Poison spraj^s will also serve to hold them in check, but such a 

 method is not practical in dealing with pests of fast growing plants 

 like tomatoes, tobacco, grapevines, etc., because of the great number 

 of applications necessary to keep all the foliage properly poisoned. 



THE WHITE-LINED SPHINX. 



Celerio lineata (Fab.) (Family Sphingidae). 



{Deilephila lineata Fab.) 

 (Fig. 136.) 



General Appearance. — This is a very common insect. The adult 

 moths are quite large, having a wing expanse of nearly three and one 



Fig. 136. — The striped morning or white-lined sphinx, Celerio lineata 

 (Fab.). Larva and adult. (After Riley.) 



half inches. The fore-wings are green with broad brown bands on 

 the front and apical margins and in the middle of each. The veins 

 are white. The hind wings are very small, dark brown with a 

 wide lighter band across the middle of each. The thorax is grayish 

 with distinct white lines, while the abdomen is dark green marked with 

 black and white spots. The larvae are quite large, often more than 

 three inches long. The color varies considerably, but is usually light 



