104 American Midland Naturalist Monograph No. 1 



I, 0.25; metatarsus, 0.25. Length of male tarsus IV, 0.42; metatarsus, 0.32. 

 With a mild subapical dorsal protuberance on tarsus I, absent on all others. 

 Dorsal humps absent on all tarsi. 



Coxae. — All coxae contiguous. 



Hood. — This very small hood is separated from the anterior projection of 

 the dorsal body wall. 



Cheeks. — Small, oval and free on their anterior ends. 



Capitulum. — Basis capituli wider than long, with the surface granulated. 

 Article 1 of the palpus with a knife-like edge on the median side extending 

 over the base of the hypostome; articles 2, 3 and 4 free. 



Hypostome. — Short, with the sides nearly parallel; notched apically. Den- 

 ticles arranged 2 / 2 covering the distal half, with 3 or 4 large teeth in each file. 

 Length about 0.18. 



Folds. — The supracoxal fold extends from the hood to behind coxa IV. 

 Coxal fold extends from coxa III to near the posterior margin. 



Grooves. — Transverse postanal groove present, all others absent. 

 Sexual opening. — Placed between coxae I. 

 Anus. — In an elliptical pattern. 



NYMPH 



The number of nymphal stages is not in evidence in the materials avail- 

 able. Matheson (1935) mentions two known nymphal stages and gives meas- 

 urements as 1.5 and 2.0, respectively. 



LARVA 



Of the larva, Matheson (1935) gives the following: 



Newly hatched larva 0.64 mm. from tip of the hypostome to posterior end of body; 

 remarkably elongated hypostome (Fig. 4, a) 0.2 mm. in length; width of body 0.28 mm 

 Hypostome narrowly elongate, sharply pointed at apex with a dentition of 2|2; lateral 

 teeth very long and apical portion lacks denticles; base of hypostome with two short 

 spines; chelicerae slightly longer than hypostome; digit quite similar to that of adult 

 though more elongate; palps free and with few spines. Full gorged larva extremely 

 distended, 1 .28 mm. in length. 



HOSTS AND DISTRIBUTION 

 Matheson states: 



This tick was collected in the larval stage on the Little Bull Bat, Dirias albiventer 

 minor (Osgood), which was captured in a mango tree in the yard of the Panama 

 Hospital, Panama City, on March 17, 1931. The bat was placed in a bag and during 

 the next few days 32 larvae dropped, full engorged. The larvae molted, and were 

 carried through the nymphal stages to the adult. Larvae of this tick were also taken 

 on the same species of bat at Summit Canal Zone, on Sept. 30, 1932. This tick appears 

 to be restricted to this one species of bat. 



