33 BULLETIN NO. 4, DIVISION OF ENTOMOLOGY. 
gentleman in Sangerfield informs me that he several times tried the ex- 
periment of placing a grub in the way of the larva, and each time it 
was set upon and immediately devoured. I found none of these larvee 
at Herkimer in June, and on July 22 the grubs had mostly changed to 
pup, while the carabid larva had also disappeared. I could not find 
@ specimen, nor could my informant, though he said they were common 
enough a few days previous. 
In the preceding account, the young grub is said to produce the 
‘‘mufile head,” and this is correct; but not all ‘muffle heads” are pro- 
duced by the grubs. My attention was called by several growers to 
yards where the vines were stunted, the tops imperfect; they refused to 
climb; the hills were called “slide downs,” “foolish hills,” or ‘ blighted,” 
and, as a rule, the damage was attributed to the “fly,” a little green 
leaf-hopper hereafter described. Several yards showed this appear- 
ance in nearly every hill, while in most yards there were some instances 
of it. At the Hop Extract works there was a yard, every hill of which 
was ‘‘ blighted,” and here I carefully examined the vines from root to 
tip to ascertain whether the trouble was caused by insects. My con- 
clusion is that it is not so caused, because while in some few hills I 
found the grub or traces of his work, most of the bills were absolutely 
free from all insect attack sufficient to cause this appearance. The vines 
are short and bushy, the heads are fuzzy, the vines become wiry, hard, 
and bony toward the tip, the joints are but an inch or less apart, and the 
leaves imperfect. The arms thrown out by the vine grow well at first, 
but in a short time become as bad as the main vine. No crop can be 
expected from such vines. I soon satisfied myself that nowhere above 
ground was any insect at work on the plants, and found also that the 
affected vines were wiry and unhealthy to the parent root, and that 
the parent root was entirely free from insect attack, but of a more shriv- 
eled, unhealthy appearance than in normal hills. I found, too, that 
this “blight” was universal in low, moist ground; that hill yards were 
almost entirely free from it, and where it occurred in a hill yard it 
was in Some depression where the water could accumulate; during the 
spring, rains were frequent and heavy, and the ground was sodden and 
unfit for working for some time, and early in the season there were 
several frosts soon after soaking rains. 
The conclusion is that the frost nipped the vines in the moist grounds 
while it had no effect on the hill yards where the drainage was rapid and 
complete. At all events, whatever be the cause of this “blight” it is 
not attributable to insects. A ‘muffle head” caused by the grub can 
be at a glance distinguished from a ‘*“ blighted” vine by the long joints 
aud otherwise healthy condition of the vine. The “ blight” shortens 
the joints and affects all the arms of the vine, while the “ grub” affects 
only the headsinhabited by it and does not otherwise cause any abnor. 
mal appearances. 
NovrE.—I have given this insect the name Aydrecia immanis Gn., 
though on close comparison with the European H. micacea Esp. I can 
