VI Journal of Agricultural Research v 0 i. ix 
PLATE ii. A .—Pectinophora gossypiella: Larva. B .—Pectinophora gossypiella; 
Schematic chart of arrangement of body setae of larva. C .—Pyroderces 
rileyi: Larva. D .—Pyroderces rileyi: Schematic chart of arrangement of 
body setae of larva. 370 
Pi,ATE 12. A .—Pectinophora gossypiella: Pupa from front. B .—Pectinophora 
gossypiella: Tip of pupa from left side. C .—Pectinophora gossypiella: 
Mature pupa, with eyes of the imago visible through pupal skin. D.— 
Pectinphora gossypiella: Pupa from back. K .—Pyroderces rileyi: Pupa 
from front. F. — Pyroderces rileyi: Pupa from back. 370 
Hybrids or Zea ramosa and Zea tunicata 
Plate 13 .—Zea tunicata: A.—Plant of full-tunicate type. B.—Plant of half- 
tunicate type. 396 
Plate 14. A.—Pistillate inflorescence of maize. B .—Zea tunicata: Terminal 
and lateral inflorescence. 396 
Plate 15 .—Zea tunicata: Sterile ear of full-tunicate plant. 396 
Plate 16 .—Zea ramosa: Staminate and pistillate inflorescence. 396 
Plate 17.—“ Cauliflower ’ ’ lateral inflorescence borne on F 2 plants of Zea ramosa 
X Zea tunicata hybrid. 396 
Plate 18.—Terminal inflorescence, cauliflower type of F 2 plant of Zea ramosa X 
Zea tunicata hybrid. 396 
Plate 19.—Half-tunicate F 2 plant, the nearest approach found to an inter¬ 
mediate between normal and half tunicate. 396 
Plate 20. A.—Terminal and lateral inflorescence of F 2 plant, showing the ear 
both branched and tunicate, and the tassel with only ramosa characters. 
B.—Terminal and lateral inflorescence of F 2 plant, combining both ramosa 
and tunicata characters. 396 
Plate 21.—Pistillate inflorescence of F 2 plant, showing both the branched and 
tunicate characters. 396 
Eupatorium ageratoides, the Cause of Trembles 
Plate 22 .—Eupatorium ageratoides , or white snakeroot. 404 
Plate 23. A.—Ewe 161 in the characteristic standing posture when trembling 
is quite violent. B.—The same animal with feet spread apart in an effort 
to stand when the tremors have become more acute. 404 
Plate 24. A.—At this stage of trembling the animal is unable to stand and is 
beginning to drop. B .—Ewe 161 in the position to which she has dropped 
after a violent spasm of trembling. 404 
A New Strain of Rhizoctonia solani on the Potato 
Plate 25. A.—Potato stems, showing the nature of the lesions from which iso¬ 
lations of Rhizoctonia solani were made. B.—Potato stems, showing the 
results of one series of inoculations.. 420 
Plate 26. A.—Reaction on corn-meal agar of R 5 , as compared with the other 
strains. B.—A potato tuber, illustrating the results of inoculation with 
strain R fi . C.—An injured potato tuber (control). 420 
A Form of Potato Disease Produced by Rhizoctonia 
Plate 27. A-D.—Various stages of the “dry core” of potato tubers. E~F.— 
Cross sections of a tuber badly affected with Rhizoctonia. 426 
Plate 28. A-C.—A longitudinal section through some of the cores of affected 
potato tubers. D.—Transverse section of a core. E-I.—“Dry cores,” 
giving a good idea of their size and shape.. 426 
