Oct., 1913-Mar., 1914 
Illustrations 
XIII 
The Serpentine Leaf-Miner—Continued: Page 
Fig. 14 .—Pleurotropis rugositkorax , a parasite of the serpentine leaf-miner. 81 
15. —Agromyza angulata . 84 
16. —Puparium of Agromyza angulata , with lateral view of anal appen¬ 
dages at left. 84 
17. —Agromyza coquilletti . 85 
The Occurrence of a Cotton Boll Weevil in Arizona: 
Fig. 1 .—Anthonomus grandis , var. thurberiae: Prothorax. 91 
2. —Anthonomus grandis Boh.: Prothorax. 91 
3. -—.Anthonomus grandis , var. thurberiae: Head and beak: A , Female; 
B, male. 92 
4. —Anthonomus grandis Boh.: Head and beak: A, Female; B t male. 92 
5. —Anthonomus grandis , var. thurberiae: Antenna of female. 93 
6. —Anthonomus grandis Boh.: Antenna of female. 93 
7. —Anthonomus grandis , var. thurberiae: A, Front leg; B, middle leg; 
C, hindleg. 94 
8. —Anthonomus grandis Boh.: A, Front leg; B , middle leg; C, hind 
leg. 94 
9. —Anthonomus grandis , var. thurberiae: Wing. 95 
Individual Variation in the Alkaloidal Content of Belladonna Plants: 
Fig. 1.—Diagram showing the percentage of alkaloids in the leaves of indi¬ 
vidual belladonna plants at the Arlington Experimental Farm, 
Va., during the seasons of 1911 and 1912. 144 
The Pubescent-Fruited Species of Prunus of the Southwestern States: 
Fig. 1.—Map of the southwestern part of the United States, showing the 
range of Prunus andersonii, Prunus fascieulata, and Prunus 
eriogyna , n. sp. 149 
2. —Map of Texas, showing the known areas and probable range of 
Prunus minuiiflora and Prunus texana . 151 
3. —Prunus texana Dietr.: A , Section of calyx; B , detail of calyx lobes, 
showing glandular margins; C, section of calyx from flower of the 
horticultural variety Ramsey, P. texana X Wild Goose plum.. 155 
4. —Prunus andersonii Gray: A, Petal; B, section of a flower; C, calyx 
showing ciliate margins; D, E, dried fruit; F , G , stone. 165 
5. —Prunus eriogyna , n. sp.: A, Section of calyx; B, detail of portion 
of calyx with petals, from outside, showing glandular ciliation 
of lobes; C, twig showing angular habit of branching, leaves and 
fruit attached. 169 
6. —Prunus fascieulata Gray: A, Section of staminate flower, showing 
abortive ovary and minute hairs on interior of calyx; B , calyx 
cup, pistillate form, showing abortive stamens; C, detail of calyx 
lobe; £>, fecundated ovary; E, F, G , fruits, three forms; H y /, /, 
seed, dorsal, ventral, and side views. 171 
7. —Prunus minutiflora Engelm.: A , Section of flower of pistillate form, 
showing well-developed pistil and abortive stamens; B, section 
of flower, staminate form, showing well-developed stamens and 
abortive pistil; C, detail of calyx lobes and petals. 173 
8. —Prunus microphylla Hems.: A , Section of staminate flower, showing 
well-developed stamens and abortive pistil; B t detail of calyx 
from outside; C, twigs showing leaves and fruit; D t fecundated 
ovary. 176 
Selective Adsorption by Soils: 
Fig. 1.—Curves showing the effect of concentration on the selective adsorp¬ 
tion of potassium from solutions of potassium by Norfolk sandy 
loam and by Marshall silt loam. 185 
2.—Curves showing the effect of the presence of sodium nitrate and 
calcium phosphate on the selective adsorption of potassium from 
solutions of potassium chlorid. 187 
A Bacterium Causing a Disease of Sugar-Beet and Nasturtium Leaves: 
Fig. i .—Bacterium aptatum from a 2-day beef-bouillon culture stained with 
carbol fuchsin. 195 
2.—Filaments of Bacterium aptatum taken from the condensation water 
from a 2-day-old agar culture; stained with carbol fuchsin: a, 
Segmented; 6, unsegmented. 195 
