Cooley &. Kohls: Argasidae of N. America, etc. 



19 



Utah. Many specimens, said to be killing chickens near St. George, 1936 (E. W. 

 Davis). Record from U. S. National Museum. 



Canada. 17496, golden-crowned sparrow, Zorwtrichia coronata (Pallas), May 2, 

 1931, Vancouver, B.C.. 4 nymphs (Hearle. 1938). 



In Mexico, Hoffman (1930) stated: 



It is found in all of the hot and dry States of the North and extending throughout 

 the regions consisting of the Central Plateau toward the south and west to the Pacific 

 Coast. In the more humid zone along the Gulf Coast and in the humid districts of the 

 south it occurs only exceptionally and then as a result of fowls being brought in from 

 infested places. Apparently it is unable to survive in these regions. It easily adapts 

 itself to the chicken houses which are protected against the cold of our Central Plateau, 

 for example, I have seen infested chicken houses at Tlalpam, D. F., which is some 

 2300 meters above sea level. (Translation.) 



According to Dunn (1923) the species is "very abundant throughout 

 Panama, the majority of chicken houses and other places where fowls com- 

 monly roost in the cities of Panama and Colon, villages in the Canal Zone 

 and native villages in the interior being usually infested with them." 



151 



M8S® 



E 



G 



Fig. 4. Argas persicus (Oken). A. Margin of adult or nymph. B, Leg I of female. 

 C. Leg IV of female. D, Hypostome of female. F, Hypostome of male. F, Capitulum 

 of larva, ventral view. G, Lateral view of edge showing sutural line. 



