The Shipley Collection of Scientific Papers, Volume 2381920 |
From inside the book
Results 1-5 of 94
Page 1
... pupa ........ 16 Cephus pygmaeus ( L. ) . Description .... 26 27 INTRODUCTION The western grass - stem sawfly ( Cephus cinctus Norton ) ( fig . 1 ) is in many ways one of the most interesting and important insects that has attracted the ...
... pupa ........ 16 Cephus pygmaeus ( L. ) . Description .... 26 27 INTRODUCTION The western grass - stem sawfly ( Cephus cinctus Norton ) ( fig . 1 ) is in many ways one of the most interesting and important insects that has attracted the ...
Page 16
... PUPA The pupa when first formed is milk - white , slender , and somewhat longer than the larva from which it was derived . Its average length is not far from 12 mm . and its breadth is about 1.5 mm . At first the pupa lies motionless ...
... PUPA The pupa when first formed is milk - white , slender , and somewhat longer than the larva from which it was derived . Its average length is not far from 12 mm . and its breadth is about 1.5 mm . At first the pupa lies motionless ...
Page 17
... pupa within the chamber . When fully mature the pupa changes within the cell to an active adult . This adult remains imprisoned until some unknown impulse compels it to force its way upward through the plug of frass placed at the upper ...
... pupa within the chamber . When fully mature the pupa changes within the cell to an active adult . This adult remains imprisoned until some unknown impulse compels it to force its way upward through the plug of frass placed at the upper ...
Page
... Pupa 14 Food Plants 3 The Adult 15 Distribution as Affected by Native Host Seasonal Phenomena of the Host Trees Plants 4 as an Index to the Time of Develop- Character of Injury 5 mental Changes of the Insect . 27 Methods Used in ...
... Pupa 14 Food Plants 3 The Adult 15 Distribution as Affected by Native Host Seasonal Phenomena of the Host Trees Plants 4 as an Index to the Time of Develop- Character of Injury 5 mental Changes of the Insect . 27 Methods Used in ...
Page 1
... pupa-- 3 The adult Seasonal phenomena of the host trees as an index to the time of develop- mental changes of the insect ---- Natural enemies .. Methods used in securing breeding material and rearing the insects- Cages used for rearing ...
... pupa-- 3 The adult Seasonal phenomena of the host trees as an index to the time of develop- mental changes of the insect ---- Natural enemies .. Methods used in securing breeding material and rearing the insects- Cages used for rearing ...
Common terms and phrases
abdominal segment abundant adults alfalfa weevil Allorhina nitida antennae appear apple Arzama Arzama obliqua attack August average bean beet borers burrow cage Calendra cat-tail cent Cephus Cephus cinctus climatic color Cotinis crop curly-leaf dark brown decora deposited disease dorsal early eggs elytra emerged entered soil Entomology experiments feeding female field fig moth figs flowers foliage food plants Galerucella grass ground grubs habits hatched head hibernation hopperburn inches infested injury insect instar Japanese beetle July July 25 killed large number larvæ leaf leafhopper leaves legs length Mesothoracic metathorax molted nymphs oblonga observed occur orchard oviposition parasites period pest Plate potato prepupae prothorax pupa pupal pupation rainfall region rhizome season seeds serghi setae showing Smyrna species specimens spiracles spray spring stage stem sterilized surface temperature third instar thorax trees tubercles Typha latifolia Utah ventral width wings winter writer yellow
Popular passages
Page 4 - If it consists in whole or in part of a filthy, decomposed, or putrid animal or vegetable substance, or any portion of an animal unfit for food, whether manufactured or not, or if it is the product of a diseased animal, or one that has died otherwise than by slaughter. Sec. 8. That the term
Page 9 - ... determine whether or not it is safe and profitable to add 20 per cent more of the lime-sulphur concentrate to a given amount of water, thus increasing the strength of the summer spray to that extent. In 1913 a proprietary spraying material in powder form, known under the trade name of "Soluble Sulphur," was used at the rate of 2 pounds to 50 gallons of water in combination with one pound of dry arsenate of lead. While this material appeared to be quite effective in scab control that season very...
Page 61 - In order that the ecological relationships of the insect fauna of the cat-tail plant may be better understood, the first part of this paper deals with the ecology of the cat-tail plant. In the second part, the life history and biology of the insect inhabitants of the plant are discussed. This part of the paper has been treated from a systematic point of view, considering the insects under their respective orders, rather than grouping them according to their life habits. In the resume", composing...
Page 16 - FH CHITTENDEN, in charge of truck crop and stored product insect investigations. AD HOPKINS, in charge of forest insect investigations. WD HUNTER, in charge of southern field crop insect investigations. FM WEBSTER, in charge of cereal and forage insect investigations. AL QUAINTANCE, in charge of deciduous fruit insect investigations. EF PHILLIPS, in charge nf bee culture.
Page 23 - Sc. D., In Charge of Truck Crop and Stored Product Insect Investigations.