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



51 



NYMPH 



The subapical dorsal protuberances and the dorsal humps are smaller in 

 the nymphs; small or negligible in the very small nymphs and become progres- 

 sively larger in the stages up to the adult. 



HOSTS AND DISTRIBUTION 



The type specimens were collected in Mexico, State of Guerrero, in native 

 huts. 



Mexico. — Through the courtesy of Dr. Mooser, we have seen specimens, 

 immature and adult, collected in native huts, Balsas River villages, State of 

 Guerrero, April 1932. 



Brumpt, Mazzotti and Brumpt (1939) mentioned specimens collected 

 from Neotoma (Hodotnys) alleni near Colima, State of Colima. 



Missouri. — We have 1 adult and 23 nymphs collected from Florida dia- 

 mond back rattlesnake, St. Louis Zoo, November 1933. 



Fig. 19. Ornithodoros nicollei Mooser. A, Leg IV of female. B, Leg I of female. 

 C, Leg IV of a small nymph. D. Leg I of a small nymph. E, Hypostome of female. 



