XIV 
Journal of Agricultural Research 
Vol.I 
A Bacterium Causing a Disease of Sugar-Beet and Nasturtium Leaves—Contd.: p ag e 
Fig. 3.—Process of cell division as seen in an 18-hour-old hanging drop cul¬ 
ture of Bacterium aptatum . 195 
4. —Bacterium aptatum showing flagella from a 2-day-old agar culture; 
stained with Loeffler’s flagella stain. 196 
5. —Camera-lucida drawing of a portion of a cross section of sugar-beet 
leaf inoculated with Bacterium aptatum . 206 
The Calliephialtes Parasite of the Codling Moth: 
Fig. i .—Calliephialtes sp.: Ventral view of terminal abdominal segments, 
showing relative position of elements of ovipositor, a, Valves 
of sheath; b , lance; c »lancets; d, cerci. 216 
2. —Calliephialtes sp.: Lateral view of terminal abdominal seg¬ 
ments, showing relative position of elements of ovipositor, 
o, Valves of sheath; 6, lance; c, lancets; c?, cerci. 216 
3. —Calliephialtes sp.: Lateral view of tips of elements of ovipositor. 
a, Sheath; b , lance; c , lancet. 217 
4. —Calliephialtes sp.: Ventral view of male genitalia, a, Sheath; 
b, penis; c, clasper; d, genital palpus; e , cardo. 217 
5. —Calliephialtes sp.: Ventral view of clasping organ of male genitalia. 
a , Basal portion; b , clasper; c, genital palpus. 217 
6. —Calliephialtes sp.: Egg. 219 
7. —Diagram showing relation between incubation period of eggs of 
Calliephialtes sp. and average mean temperature at Vienna, 
Va., 1912. 220 
8. —Calliephialtes sp.: Dorsal view of newly hatched larva. 221 
9. —Calliephialtes sp.: Ventral view of head of newly hatched larva.. 221 
10. —Calliephialtes sp.: a, Full-grown larva; b, face. 221 
11. —Diagram showing relation between temperature and larval period 
of males and females of Calliephialtes sp. in the cocoon at 
Vienna, Va., 1912. 224 
12. —Calliephialtes sp.: Prepupa of female. 225 
13. —Calliephialtes sp.: Beginning of exuviation of female pupa. 226 
14. —Calliephialtes sp.: Pupa of female and tip of abdomen of male 
pupa. 226 
15. —Diagram showing relation between pupal period of Calliephialtes 
sp. and temperature. 228 
The Foot-Rot of the Sweet Potato: 
Fig. 1.—Graphic representation of growth on rice at different temperatures. 2 70 
A Drought-Resisting Adaptation in Seedlings of Hopi Maize: 
Fig. 1.—Diagram of seedling maize plant, giving terminology of parts_ 294 
2.—Diagram showing the average size of seedlings of Chinese, Boone 
County White, and Navajo maize planted at different depths.. 296 
Some Diseases of Pecans: 
Fig. 1.—Cross section of pecan leaf recently infected with the nursery-blight 
fungus (Phyllosticia carycte Peck). 306 
2. —Horizontal section of leaf recently infected with the nursery-blight 
fungus. 311 
3. —Cross section of a leaf infected with the brown leaf-spot fungus.. 314 
4. —Diagram showing measurements in length of 200 conidia. 318 
5. —Diagram showing measurements in width of 200 conidia. 319 
6. —The anthracnose fungus upon corn-meal agar: A, Acervulus; B, 
conidia; C, ascus. 328 
7. —Diagram showing ascospore measurements of the anthracnose 
fungus: A , Length of 150 ascospores; B , width of 150 ascospores. 328 
8. —Diagram showing conidial measurements of the anthracnose fun¬ 
gus: A , Length of 150 conidia; B t width of 150 conidia. 329 
A Twig Blight of Quercus Prinus and Related Species: 
Fig. 1 .—Diplodia longispora: A section of a pycnidium. 340 
2. —Diplodia longispora: Stages in development of spore. A , Macro- 
phoma stage; B, Diplodia stage; C, Diplodia spore with two 
septa. 340 
3. —Diplodia longispora: Sclerotial bodies formed in artificial media. 343 
4. —Diplodia longispora: A section showing grouping of pycnidia,.. 344 
