. The life history and bionomics of some North American ticks . Alaska, Labrador, Ontario, and NovaScotia on the north and its range extends southward through theUnited States to the Gulf coast. There is also one record fromMexico. Although the species has been listed from Colorado, NowMexico, and Arizona, our investigations indicate that it docs not nor-mally occur in those States. There is, however, a considerable areain western California and southwestern Oregon where the species isvery common. In this region and in the Central and Southern Statesthe species appears to occur most abundantly
. The life history and bionomics of some North American ticks . Alaska, Labrador, Ontario, and NovaScotia on the north and its range extends southward through theUnited States to the Gulf coast. There is also one record fromMexico. Although the species has been listed from Colorado, NowMexico, and Arizona, our investigations indicate that it docs not nor-mally occur in those States. There is, however, a considerable areain western California and southwestern Oregon where the species isvery common. In this region and in the Central and Southern Statesthe species appears to occur most abundantly. LIFE HISTORY. Observations on the biology of this tick have been published byMorgan (1899, pp. 133, 135), Hunter and Hooker (1907, pp, 50-51), and by Hooker (1908, p. 47). 192 LIFE HISTORY OF NORTH AMERICAN TICKS. The egg (Table XC).—The minimum preoviposition period for alarge number of ticks observed at different times of the year was 5days and the maximum 14 days. This minimum preovipositionperiod was observed in a number of instances during the summer. Fig. 16.—The American dog tick, Dcrmaccntor variabilis: Distribution in the United States. The largedots show localities where the species has been collected in our investigation. The small dots indicatethe probable range of the tick. (Original.) months, while the maximum period was recorded once in March andonce in April, 1909. The mean temperature during the shortestperiod was 80° F. The period of oviposition varied from 14 to 29days with an average of days. A tick which was collected on a Bui. 106, Bureau of Entomology, U. S. Dept. of Agriculture. Plate XV, C M • % ma
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Keywords: ., bookauthorhunterwd, bookcentury1900, bookdecade1910, bookyear1912
