OF THE STATE ENTOMOLOGIST, 47 



more tender-rooted varieties succumbing most readily ; the more vig- 

 orous growers resisting best. 



I have already given, in my fourth Report, Dr. Engelmann's classi- 

 fication of our different species of Vltis, and in the Appendix will be 

 found the synopsis kindly prepared for me by that well-known botan- 

 ist, with additional remarks, and embodying his latest opinions and 

 observations. (14) 



Following this synopsis, I will now proceed to indicate the relative 

 susceptibility to the disease, of the cultivated species and their vari- 

 eties — revising and perfecting the list given in the report just quoted 

 by aid of repeated and extended observations since made. For the 

 sake of conciseness, I will indicate this susceptibility by letters and 

 numerals as follows : 



= No perfect leaf-galls found ; or not at all subject to tliein. 



<t, = Leaf-galls very rarely fouatl. 



6 = Leaf-galls more frequently met Avith. 



c = Leaf-galls most abundantly found ; or very much subject to them. 



= Entirely free from root-lice. 



1 = Having the root lice in usually small numbers, but countervailing their punc- 



tures either by the innate toughness of fiber, or the power to resist decom- 

 position. 



2 = Having the root-lice more abundant and suffering more from their attacks. 



3 = Most subject to the root-lice, and dying from their attacks when the conditions 



are favorable to their increase. 



EUROPEAN VINE ( Vitis vinifera)— <?, 3. The very few exceptions, 

 already mentioned, where galls have been found on the leaves of this 

 species, will scarcely invalidate the rule that it is free from galls. 

 Regarding its susceptibility to the attacks of the root-lice, it generally 

 succumbs a few years after planting. (15) 



RIVER BANK GRAPE (;'fyy«/'ia)— Alvey— f*,2. Cornucopia (hybrid 

 with vinifera) — o. 2. Clinton — c, 1. Where the leaf-galls are very 

 abundanti have often found the root-lice less so, and vlceversa. The 

 roots have such vitality that disorganization does not always follow 

 the puncture of the louse, and new rootlets often push out from the 

 swellings. Delaavare— 5, 2. Golden Clinton — a, 1. Louisiana — (some 

 say a seedling of vinifera; others again believe it cestivalis) — «, 1. 

 Marion — J, 1. Othello (hybrid with vinifera) — «, 2. Taylor — 6% 1. 

 Much as with Clinton. 



SUMMER GRAPE (tes2:^yrtZ/s)— Herbemont— «, 1. Cunningham — o, 1. 

 Cynthiana — a, 1. Noktois's Virginia — o, 1. Rulander— <?, 1. Tele- 

 graph — 0, 1. • 



NORTHERN FOX (Z^Srw^ca)— Catawba— c, 3. Suffering almost 

 as badly as the varieties of vinifera. Challenge (hybrid with vini- 

 fera) — o, 1. Creveling — «, 2. Concord — a, 1, Diana — o, 2. Dracut 

 Amber — o,\. Goethe (hybrid with vinifera) — 0,2. Hartford— o, 2 



