CHRYSOMELIDuE. 



507 



is covered with punctures, which are arranged in rows on the 

 wing-cases, and there is a deep transverse furrow across the 

 hinder part of the thorax." It not only kills young cucumber- 

 vines, eating the seed leaves, but is found 

 all through the summer eating holes in the 

 leaves of various garden vegetables. 



The Grape-leaf Flea Beetle, H. (Grapto- 

 dera) chalybea Illiger, eats the buds and 

 leaves of the grape. It is a steel blue in- 

 sect, often varying in its shades of color- 

 ing, sometimes becoming greenish. It is Fi - 503 - 

 a little over three-twentieths of an inch in length. In Ohio, 

 Mr. M. C. Reed noticed the sexes of this species, which Dr. 

 Leconte considers as probably the Graptodera exapta of Say 

 (Fig. 503), pairing May 6th. The larvae appeared the last of 

 the month, and by the first week in June, and on the 30th of the 

 same month, the beetles appeared. I have received specimens 

 of the larva from Mr. Read. It is a yellowish white, cylindrical 

 worm, with a jet black head and black tubercles, from each of 

 which proceed several fine hairs. The prothorax is brown black 

 above ; on each succeeding ring of the 

 body are ten tergal black tubercles, the 

 two inner ones being long and narrow, 

 and transverse, the others forming 

 round dots. On each ring is a single 

 black dot just between the two lower 

 larger tubercles. On the sides are two rows of black tubercles, 

 and along the middle of the under side a row of transverse 

 tubercles, on each side of which is a row of dot-like tubercles. 

 It is .35 of an inch in length. 



The Striped Turnip Flea beetle, H. (Phyllotreta) striolata 

 Fabr. (Fig. 504 ; a, larva ; 6, pupa), is black, with a waved yel 

 lowish stripe on each wing-cover, and is less than a tenth of an 

 inch long. Dr. Shimer describes the larva as being white ; the 

 head is of a pale brown color, and near the end of the body is a 

 brown spot equal to the head in size ; besides the thoracic legs 

 there is a single anal prop-leg. It is .35 of an inch long. It 

 feeds upon roots beneath the ground. The pupa is naked, 

 white, and transforms in an earthen cocoon. In seventeen 



Fig. 504. 



