30 Bulletin 184. 



the grape-vines found dying from tlie attacks of the grnbs near 

 Ri])ley, X. V. Note that most of the tlhrons rootlets have been 

 eaten off. Tlie differences between injured and uninjured roots are 

 well shown in figure 10; nearly all the l)ark and the tibrons roots 

 liave been eaten olf the thi'ee portions of roots shown on the right. 

 Wiien the a-i-ubs have thns denuded the lai'o'er roots of theii- hark 

 and fibrous ro<»tlets, the vine nsually succumbs, but may Jead a lin- 

 gering existence and partially recover if tlie attack is not continued. 

 This was evidently the case in the vineyard shown in fiaure o. 

 Some of the vines had been killed ])\ the pest while many others 

 had begun to recover, and new fibrous roots were developing, l)ut 

 the vines will doubtless never fully recover, and <»!ie had l)etter dig 

 out such vines, and, after a year or two of other crops, set new 

 vines. 



Pi^ANTs Attacked. 



Besides the cultivated vai'ieties of grape, the beetles have been 

 found feeding only on the wihl gra[)c-vine, on the leaves of the 

 red-bud oi- Judas-tree, and in Xew Jersey on Amj^elojysis. 



Its Life-Stoky. 



By his investigations in 1S94, ^fr. Webster of the Ohio Experi- 

 ment Station was the first to unravel the mystery which had jirevi- 

 ously enveloped the early stages of this pest. 



The eg'g'-Stag'e. — lie discovered the yellowish eggs laid in large 

 batclies, usually j^laced under the slightly loosened, hark of the pre- 

 vious year's or even an older growth, often several fV^t above 

 the roots. Several dozen eggs are frerpienrly found in a single 

 cluster, the ends pointing obliquely toward a common center. Over 

 700 eggs have been found on a single vine in ( )hio, but the lunnber 

 each female beetle may deposit is not known. \ erv rarely the 

 eggs may be ])ushed into cracks in the S(jil about th(^ base of the 

 vine, and as they are often loosely attached to the bark thev not 

 infrequently fall to the ground from the swaying of the vine by the 

 wind. Egg-laying begins in the latter j^art of June and doubtless 

 continues during July. The eggs hatcli in about eight days. 



Habits of the grubs. — Mr. Webster states that lie "lav on the 



