X Journal of Agricultural Research voi. vi 



Page 



Plate XXIX. Lyctus planicollis: Larval burrows in an ash shovel handle 276 



Plate XXX. Lydus planicollis: Pupal cells in "powder-posted" white-ash 



shovel handle 276 



Plate XXXI. Lydus planicollis: Exit holes of adults in ash shovel handles. . 276 



Hypoderma deformans, an Undescribed Needle Fungus op the Western 



Yellow Pine 



Plate XXXII. Fig. i. — Needles of Pinus ponder osa infected with Hypoderma 

 deformans, showing the apothecia. Fig. 2. — Branches of Pinus ponderosa 

 deformed and broomed by Hypoderma deformans. Fig. 3. — A branch of 

 Pinus ponderosa, showing how it will hang vertically when supporting a 

 large broom caused by Hypoderma deformans 288 



Ornix geminatella, the Unspotted Tentiform Leap Miner of Apple 



Plate XXXIII. Omix geminatella Pack.: Fig. i. — Moth expanded. Fig. 2 — 

 Moth at rest on leaf. Fig. 3. — Egg on lower surface of leaf; also tunnel made 

 by miner on leaving the egg. Fig. 4. — Dorsal view of first larval stage ; be- 

 low, side view of head and thorax. Fig. 5. — Dorsal view of second larval 

 stage. Fig. 6. — Side view of second larval stage. Fig. 7. — Dorsal view of 

 third larval stage, showing edge of thoracic legs. Fig. 8. — Dorsal view of 

 fourth larval stage. Fig. 9. — Side view of fotirth larval stage. Fig. 10. — 

 Ventral view of pupa. Fig. 11. — Dorsal view of same. Fig. 12. — Lower 

 surface of leaf with numerous partly developed mines; also two cocoons, 

 one exposed. Fig. 13. — Portion of leaf showing a mine in process of devel- 

 opment. Fig. 14. — A small twig showing leaves badly curled and injvired 

 by numerous mines. Fig. 15. — Leaf much distorted with 10 mines almost 

 completed; also one cocoon appears at the tip of the leaf 296 



A Western Fieldrot op the Irish Potato Tuber Caused by Fusarium 



radicicola 



Plate XXXIV. Fig. i, 2, 3, 4. — Types of stem-end blackrot, lenticel rot, and 

 eye rot in Idaho Rural potato tubers. Fig. 5, 6. — Longitudinal and cross 

 sections of an Idaho Rural tuber infected with blackrot 310 



Plate XXXV, Fig. i. — Netted Gem potato tuber infected with jelly-end rot. 

 Fig. 2. — Stem-end view of a Netted Gem tuber infected with jelly-end rot. 

 Fig. 3. — Longitudinal section of a Netted Gem tuber infected with jelly-end 

 rot. Fig. 4. — Idaho Rviral tuber infected with stem-end and lenticel black- 

 rot, after having been kept 10 days in a moist chamber. Fig. 5. — Idaho 

 Rural tuber infected with lenticel blackrot after having been kept in a 

 moist chamber for 10 days 3 10 



Plate XXXVI. Fig. i, 2. — Stem-end blackrot produced by stem-end punc- 

 tures with a needle carrying Fusarium radicicola. Netted Gem and Idaho 

 Rural potato tubers. Fig. 3. — Lenticel blackrot produced by spraying the 

 tuber with a spore suspension of F. radicicola. Netted Gem tuber. Fig. 4 — 

 Same tuber as shown in figure 3 ; after having been kept a few days longer 

 in the moist chamber. Fig. 5. — Stem-end blackrot produced by spraying 

 an Idaho Rural tuber with a spore suspension of F. radicicola. Fig. 6. — 

 Stem-end blackrot produced by the inoculation of the tuber stolon. Idaho 

 Rural tuber. Fig. 7. — Blackened vascular system produced by the inocu- 

 lation of the tuber stolon. Idaho Rural tuber 310 



