192 MANUAL OF VEGETABLE-GARDEN INSECTS 



The moth has an expanse of about 1^ inches. The front 

 wings are purplish brown with an obUque band in the front 

 angle and the area back of the silver spot velvety reddish brown. 

 The silver mark is distinct and the hind margin of the front 

 wing is scalloped so as to leave a rounded projection at the 



hind angle. The hind wings are 

 yellowish brown, darker toward the 

 margin, which is edged with white 

 (Fig. 118). 



The egg is about ^V ii^ch in 

 diameter, milky white, globular, 

 slightly flattened and marked with 

 Fig. 118. — Moth of the celery delicate longitudinal ridges. The 



looper (X U). 1 X 1 • 1 X 1 



eggs hatch in about a week. 



In Illinois there are apparently three broods annually, the 

 moths flying in April and early May, in late July and early 

 August and again in late September. The caterpillars of the 

 summer brood require about three weeks to reach maturity. 



The celery looper does not often occur in sufficient numbers 

 to require remedial measures. As arsenicals cannot be used 

 on celery or lettuce, hand-picking the caterpillars is the only 

 measure available and will usually be found sufficient. 



Reference 

 Coquillett, 11th Rept. State Ent. 111., pp. 38-43. 1882. 



The Tarnished Plant-Bug • 



Lygus pratensis Linnaeus 



The tarnished plant-bug is one of the commonest insects 

 found on garden plants. It feeds on a great variety of trees, 

 shrubs and herbs, showing a special liking for opening buds, 

 flowers and tender new growth. It is widely distributed through- 

 out the entire north temperate zone. The adult (Fig. 119) is an 



