Oct. i, 1920-Mar. is. 1921 



Illustrations XV 



72. Caulophilus latinasus: A.— Pupa, dorsal view. B — Pupa, front view. 



C. — Egg. D. — Mandible. E. — Mature larva. F. — Ventral view of 

 head. G— Labium and clypeus. H— Pupa, lateral view. I.— Head, p age 

 face view. J.— Head, dorsal view. K— Head, lateral view 614 



73. Sitophilus oryza: A. — Pupa, dorsal view. B. — Pupa, front view. C. — 



Egg, D.— Mandible. E — Mature larva. F.— Ventral view of head. 

 G.— Labium and clypeus. H.— Pupa, lateral view. I.— Head, face 

 view. J. — Head, dorsal view. K. — Head, lateral view 614 



74. Sitophilus granarius: A.— Pupa, dorsal view. B.— Pupa, front view. 



C— Egg. D.— Mandible. E.— Mature larva. F.— Ventral view of 

 head. G.— Labium and clypeus. H.— Pupa, lateral view. I.— Head, 

 face view. J. — Head, dorsal view. K. — Head, lateral view 614 



Freezing of Fruit Buds 

 Plate 



75. Apparatus for freezing entire tree 66a 



Effect of Various Crops upon the Water Extract of a Typical Silty 

 Clay Loam Soil 



Text Figures 



1. Decrease of water-soluble nutrients from the growth of various crops, as 



shown by increases in specific resistance 66 4 



2. Decrease of water-soluble nutrients from varying numbers of barley plants, 



as shown by increase in specific resistance 66 4 



3. Decrease of water-soluble nitrates from the growth of various crops. (Graphs 



=K N0 3 .) 66 5 



4. Decrease of water-soluble nitrates from varying numbers of barley plants. 



(Graphs=K N0 3 .) 666 



5. Decrease in the concentration of soil solution shown by freezing-point de- 



pression 666 



Another Conidial Sclerospora of Philippine Maize 



Text Figure 



1. Comparison of the sizes of 700 conidia of Sclerospora spontanea with 700 

 conidia of 5. philippinensis; A, variation of conidia in length; B, varia- 

 tion of conidia in diameter ; C, ratios of length to width of conidia arranged 

 in classes "75 



Plates 



76. Corner of a native-grown maize plot in the interior uplands of Cebu 684 



77- a. — Clump of Saccharum spontaneum, showing characteristic size and 

 habit of healthy plants under natural conditions. B.— Clump of Sac- 

 charum spontaneum infected with Sclerospora spontanea 684 



-8, A. — A young seedling (3 weeks old) of Saccharum spontaneum infected with 

 Sclerospora spontanea. B. — Conidiophores on the leaf of Saccharum 

 spontaneum. C— Young shoots of Saccharum spontaneum arising after 

 the primary stalk had been cut, and like it severely infected with Sclero- 

 spora spontanea 4 



