The Shipley Collection of Scientific Papers, Volume 2381920 |
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Page 11
... LARVA When it escapes from the egg the larva ( fig . 6 ) possesses a very large head armed with a pair of powerful biting jaws , a weak , slender body , and a most vigorous appetite . It is very active from the start and begins almost ...
... LARVA When it escapes from the egg the larva ( fig . 6 ) possesses a very large head armed with a pair of powerful biting jaws , a weak , slender body , and a most vigorous appetite . It is very active from the start and begins almost ...
Page 13
... larvæ , and possibly with the length of the larval period . August 29 , 1911 , at Kimballs , Utah , at an elevation of 7,000 feet , the writer found mature larvæ in stems of Elymus condensatus . The next year , at the same place ...
... larvæ , and possibly with the length of the larval period . August 29 , 1911 , at Kimballs , Utah , at an elevation of 7,000 feet , the writer found mature larvæ in stems of Elymus condensatus . The next year , at the same place ...
Page 14
... larvae was removed from the hiber- nation chamber and placed in a small vial , still inclosed within the silken tube or cocoon , which was unbroken . For months this larva remained passive and motionless except when the vial was exposed ...
... larvae was removed from the hiber- nation chamber and placed in a small vial , still inclosed within the silken tube or cocoon , which was unbroken . For months this larva remained passive and motionless except when the vial was exposed ...
Page 15
... larva lies with its head up and usually pressed against the barrier at the top , always on the alert to retreat down- ward at any sign of disturbance . It descends by alternately flexing and straightening the body , bracing itself first ...
... larva lies with its head up and usually pressed against the barrier at the top , always on the alert to retreat down- ward at any sign of disturbance . It descends by alternately flexing and straightening the body , bracing itself first ...
Page 16
... larva on February 23 , 1916 , 3 years and 5 months later . The others had nearly all died within about 30 months of ... larvæ that were to all appearances entirely normal and active . It ap- pears more than probable that in this manner ...
... larva on February 23 , 1916 , 3 years and 5 months later . The others had nearly all died within about 30 months of ... larvæ that were to all appearances entirely normal and active . It ap- pears more than probable that in this manner ...
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.