326 MANUAL OF VEGETABLE-GARDEN INSECTS 



Tn California a closely related species, PhyUotrcia ramom 

 Crotch, in which the yellowish stripe on the win<^^-cover has a 

 short branch just back of the middle, has been reported as in- 

 jurious to turnip, radish and mustard. 



The four-spotted cabbage flea-beetle, PJiyUotreta hiimstuhta 

 Fabricius, is sometimes found feeding on cabbage and turnip 

 in the Atlantic states. Its wild food plants are hedge mustard, 

 charlock and shepherd's purse. It has never been known to 

 cause any serious injury. In this species each wing-cover is 

 marked wdth two large yellowish spots. 



In California cabbage, radish, mustard and turnip are some- 

 times attacked by a small, dark, metallic green flea-beetle, 

 Ilemiglyytus hasalis Crotch. 



The Sinuate-Striped Flea-Beetle 



Phyllotreta sinuata Stephens 



This flea-beetle is often found in company with the striped 

 cabbage flea-beetle, feeding on cabbage, turnip and radish. 

 The insect was probably introduced from 

 Europe l)ut is now widely distributed 

 throughout the United States and Canada. 

 The beetle averages somewhat larger than 

 the striped cabbage flea-beetle and the 

 yellowish stripe on the wing-cover does 

 not turn inward toward the base, being 

 nearly parallel with the inner margin 

 (Fig. 205). The eggs are deposited singly 

 on the upper surface of the leaf along the 

 Fig. 205.— The sirmato- midrib. The egg is yi? inch in length, 



striped flea-l)eetle , ,, . , , .. , i i i 



(X14). dull greenish white, depressed, oblong 



and glued to the leaf by one side. The 

 larva? have been found as miners in the leaves of wild pepper- 

 grass, cress and rock cress. The young larvne enter the leaf, 



