ILLUSTRATIONS 
PLATES 
Corn-Leaf Blotch Miner 
Page 
Plate X. Fig. i. — Large com leaf, showing blotch mines. Fig. 2.— Young com 
leaf from breeding cage containing six larvae. Fig. 3.—Shows how mines 
occasionally fill with water. Fig. 4.—Millet leaf showing feeding punc¬ 
tures. Fig. 5.—Large com leaf with three larvae in the same tunnel. 
Fig. 6.—Section of leaf shown in figure 5 slightly enlarged. Fig. 7.— 
Straight mine ending in a slight blotch in a large leaf. 32 
Plate II. Fig. 1.—Rearing shelter used for Agromyza parvicornis and other 
insects at La Fayette, Ind. Fig. 2.—Rearing cage used for Agromyza 
parvicornis . 32 
Plate III. Fig. 1.— Agromyza parvicornis , the corn-leaf blotch miner: A, Dorsal 
view of adult; B, antenna of female; C, head of male; D , hypopygium of 
male; E, ovipositor of female. Fig. 2.— Pleurotropis utahensis , a parasite 
of Agromyza parvicornis: Adult.. 32 
Plate IV. Fig. 1.— Closterocerus iricinctus , a parasite of Agromyza parvicornis: 
A , Dorsal view of adult; B, side view of antenna. Fig. 2.— Opius diastatae , 
a parasite of Agromyza parvicornis: Adult. Fig. 3.— Opius succineus , a 
parasite of Agromyza parvicornis: Adult. 32 
PLATE V. Fig. 1 .—Derostenus punctiventris, a parasite of Agromyza parvicornis: 
Adult. Fig. 2 .—Opius utahensis, a parasite of Agromyza parvicornis: 
Adult.. 32 
Coloration of the Seed Coat of Cowpeas 
Plate VI. Fig. x. —Transverse section of the seed coat of a cowpea, similar to 
that shown in text figure 1, but showing the relative thickness of three 
layers, as on the seed. The cells are not expanded with chloral hydrate. 
cu , Cuticle; a, palisade layer; b, middle or hour-glass layer; c, basal-color 
layer. Fig. 2.—Seeds of cowpeas, showing some of the variations in the 
style of marking of the seed coat. 56 
Experiments with Apple Leaf-Spot Fungi 
Plate VII. Fig. 1.—Apple leaves from Tennessee, showing typical spots of the 
frog-eye disease. Fig. 2. —Spores of Alternaria mali , which is capable of 
enlarging dead spots on apple leaves. Fig. 3.—York Imperial apple leaves, 
showing spots enlarged by Alternaria mali . 66 
Eremocitrus, A New Genus of Hardy, Drouth-Resistant Citrous Fruits 
from Australia 
Plate VIII. Eremocitrus glauca (Lindl.) Swing. Grown from seed from the 
Condamine River near Chinchilla, Queensland, Australia. Fig. 1.— 
Desert kumquat grafted on the Australian finger lime ( Citrus australasica). 
Fig. 2.—Desert kumquat grafted on the wood-apple ( Feronia elephantum) .. 100 
V 
