GRAPEVINE ROOT WORM 13 



Jersey states that this species occurs throughout New Jersey 

 on the grape and Virginia creeper or Ampelopsis, and he also 

 records it from Staten Island. A brief note published by Dr 

 L. O. Howard in 1901 states that the depredations of this insect 

 at Bloomington 111. continue unabated and severe damage to 

 vineyards is recorded. The writer, in the early spring of 1902, 

 published a brief notice of the extent of the injuries in the Chau- 

 tauqua grape belt with a summary of the life history of the pest 

 and outlined a series of experiments for that year, which are 

 reported on in detail in this bulletin together with the results 

 obtained in 1903. 



DESCRIPTION 



The perfect insect is a small, brown, rather robust beetle 

 about i inch in length and rather densely covered with short 

 grayish white hairs. It may be recognized by aid of plate 1, 

 figure 1. 



The Qgg is about ^^^ inch in length with a transverse diameter 

 about one fourth as great. Form, nearly cylindric, tapering 

 a trifle at each end. The shell is flexible, and, when a number 

 of eggs are crowded in a small space, they may become somewhat 

 distorted. The eggs are white when first deposited, but soon 

 assume a yellowish cast. On the fourth day a narrow semitrans- 

 parent band appears near each end. The eggs of the clusters 

 normally have a somewhat concentric arrangement, and range 

 in number from 1 to 125. Several clusters are represented on 

 plate 1, figure 3. 



The young larva is creamy white, about ^^ inch in length and 

 tapers somewhat posteriorly. The head is a pale, yellowish 

 color with the mouth parts ranging from light to dark brown, 

 the sutures and tips of the mandibles having the most color. 

 The head is somewhat flattened, bilobed and with the posterior 

 angles rounded. The mandibles are distinctly toothed. The 

 body is slightly smaller than the head, convoluted and distinctly 

 segmented. Each segment bears a transverse row of small 

 tubercles, from each of which a long hair arises. The spiracles, 

 or breathing pores, are darker than the body and usually light 

 yellow. 



The nearly full grown grub resembles the newly hatched 

 individuals very much in general form and color. It is then 



