v^ 



10 



Farmers' Bulletin 1057. 



which to live as a parasite, it dies of starvation. The endurance of 

 seed ticks is very great, however, as they have been found to live 

 more than 8 months during the colder part of the year. For example, 

 it is known that in the case of female ticks that dropped to the 

 ground August 14 and deposited eggs that began to hatcli Sopteuiber 



SEED TICKS 



A 



t 



NVMPH 



ADULT MALE 



ENGORGED ADULT FEMALE 



YOUNG 

 ADULT FEMALE 



FEMALE LAYING EGGS 



Fig. 4. — Tt'xas-reVL'r ticks, ma^nilicd 5 times. 



9, all the seed ticks from the eggs were not dead until the following 

 May 13, 24G days after hatching began, or 274 days after the females 

 dropped from the cattle. Fortunately, however, seed ticks are not 

 able to live nearly so long during warm woatlier and die within a few 

 months in the sunnner. 



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