Oct. 2-Dec. 26,1916 
Illustrations 
XI 
Page 
Pi,ATS 24. A.—Broad-leaved plantain showing the effect of an attack by Myzus 
plantaginis. B.—Apple leaves curled by colonies of Aphis malifoliae . 344 
Plate 25. A.—Rhode Island Greening apples deformed by Aphis malifoliae. 
B.—Apple twigs twisted by colonies of Aphis malifoliae: Beginning of 
twisting. C.—Apple twigs twisted by colonies of Aphis malifoliae: Twisted 
twig. D.—Winesap apples deformed by Aphis malifoliae . 344 
Laspeyresia molesta, an Important New Insect Enemy op the Peach 
Plate 26. Laspeyresia molesta: A.—Injury to shoot of a Domesticaplum. B.— 
Injury by larva to cherry. 378 
Plate 27. Laspeyresia molesta: One-year budded peach nursery tree, showing 
injury of caterpillars. 378 
Plate 28. Laspeyresia molesta: A.—Typical appearance of peach twigs in fall 
injured by larva. B.—-Peach twig, showing large mass of dried gum and 
leaf fragments due to attack by the caterpillar. 378 
Plate 29. Laspeyresia molesta: A.—Typical exterior appearance of larval in¬ 
jury to peach shoot. B.—The same shoot cut open, showing the larva in 
its burrow. 378 
Plate 30. Laspeyresia molesta: A.—Cavity excavated in peach by larva enter¬ 
ing at the side. B.—Larval injury at stem end of peach; also the summer 
cocoon of the insect. 378 
Plate 31. Laspeyresia molesta: Peach cut open to show larval injury at the pit. 378 
Life History and Poisonous Properties op Claviceps paspali 
Plate 32. A.—Section through a mature stromatic head of Claviceps paspali , 
showing perithecia containing asci. B.—Spike of Paspalum dilatatum 
with mature sclerotia attached. C;—Tufts of hyphae producing sphacelial 
spores. D.—Section of mass of tissue within grass spikelet during spha- 
celia stage of Claviceps paspali; spores are produced by tufts of hyphae 
along edge of section. E.—Schlerotium of Claviceps paspali with stromata. 
F.—Spikes of Paspalum dilatatum , showing a number of sclerotia attached. 406 
Macrosiphum granarium, the English Grain Aphis 
Plate B. Forms of Macrosiphum granarium: 1.—Mother of males and grand¬ 
mother of oviparous females. 2.—Typical green viviparous female. 3.— 
Pupa of male. 4.—Pupa of the mother of oviparous females. 5.—Ovipa¬ 
rous female. 480 
Plate 33. Macrosiphum granarium: A.—Winged viviparous female: a, Cor¬ 
nicle. B.—Winged male. 480 
Plate 34. Macrosiphum granarium: A.—Antenna of male. B.—Antenna of 
winged viviparous female. C.—Hind tibia of oviparous female. D.—An¬ 
tenna of wingless viviparous female. E.—Antenna of wingless oviparous 
female. Antenna of stem mother. 480 
A Specific Mosaic Disease in Nicotian a viscosum Distinct from the 
Mosaic Disease of Tobacco 
Plate 35. Leaves of Nicotiana viscosum affected with the mosaic disease. 486 
PLATE 36. A. —Normal blossoms from healthy plants of Nicotiana viscosum. B. 
—Depauperate blossoms from mosaic plants affected with the mosaic dis¬ 
ease peculiar to N. viscosum. C, D.—Blossoms showing catacorolla, etc., as 
a result of the mosaic disease affecting Nicotiana viscosum . 486 
