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



73 



30, 31, 32, and 33. The drawings of the hypostomes show clearly that these 

 characters are dependable even in the early nymphal stages. The same is true 

 of all other species of Ormthodoros so far as we have studied them. 



Fig. 31. Ornilhodoros luricala (Duges). A, Hypostome of female. B, Hypostome 

 of male. C, Hypostome of fourth stage nymph. D, Hypostome of third stage nymph. 

 E, Hypostome of second stage nymph. F, Hypostome and palpi of first stage nymph. 

 G, Hypostome and palpi of larva. 



