X 
Journal of Agricultural Research 
Vol. II 
TEXT FIGURES 
Corn-Leaf Blotch Miner 
Fig. i. Map of the United States, showing distribution of Agromyza parvicornis, 
the corn-leaf blotch miner. 
2. Tip of com leaf, showing work of Agromyza parvicornis , the corn-leaf 
blotch miner: a, Egg; b , newly hatched larva in mine; c, feeding 
punctures of adults. 
3. Agromyza parvicornis , the corn-leaf blotch miner: Full-grown larva; a. 
sp. } anterior spiracles; p. sp., posterior spiracles. 
4. Agromyza parvicornis , the com-leaf blotch miner: Mouth hooks of larva. 
5. Agromyza parvicornis , the com-leaf blotch miner: Puparium; a, dorsal 
view; b , ventral view; c , view of posterior extremity. 
6. Pleurotropis utahensis, a parasite of Agromyza parvicornis; Larva. 
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Coloration of Seed Coat of Cowpeas 
Fig, i. Transverse section of the seed coat of a cowpea with the cells expanded 
with chloral hydrate so as to show the structure of the three layers: cm, 
Cuticle; a, palisade layer; b , middle or hour-glass layer; c, basal-color 
layer. 35 
2. Outer surface of the seed coat of a cowpea, showing the upper ends of the 
palisade cells. 37 
Behavior of Cup Current Meters under Conditions not Covered by 
Standard Ratings 
Fig. i. Standard-rating curve on logarithmic scale, as developed by U. S. Bu¬ 
reau of Standards, for new cup meter, with points developed by rating 
the same meter at Calexico, Cal., under conditions similar to those 
under which it was originally rated and under other conditions not met 
in the usual rating. 78 
2. Rating curves and individual points on logarithmic scale, developed 
in the rating of a new cup meter at the hydraulic laboratory of Cornell 
University by holding the meter nearer the surface of the water and 
nearer the sides of the channel than is done in the usual rating. 79 
3. Vertical velocity curves, showing error due to using standard rating for 
points near the surface and bottom, Orr ditch, Nevada. 80 
4. Curves on logarithmic scale, showing relation between rlate of vertical 
movement of a cup meter and velocity of water as indicated by the 
revolutions of the turbine due to vertical movement in still water.. 81 
Eremocitrus, A New Genus of Hardy, Drouth-Resistant Citrous Fruits 
from Australia 
Fig. 1. Eremocitrus glauca: Twigs from a syntypic specimen collected by T, L. 
Mitchell, near Forest vale, Queensland, Australia, on October 17, 
1846; from Gray Herbarium. A , Spiny twig showing a single flower; 
B, spineless sterile twig; natural size. C, tetramerous flower seen 
from the side. 86 
2. Eremocitrus glauca: Fruits and seed from Tambo, Queensland, Austra¬ 
lia. A, large pyriform fruit, natural size; B, small oblate fruit, 
natural size; C, cross section of a 4-celled fruit, showing four seeds 
and numerous pulp vesicles, natural size; D , a single, short-stalked 
pulp vesicle; E , seed, showing rugose testa 
87 
