90 American Midland Naturalist Monograph No. 1 



Capitulum. — Basis capituli about as wide as long, surface with transverse 

 wrinkles and numerous micromammillae; with a pair of fine hairs posterior to 

 the posthypostomal hairs and a group of smaller hairs on each side behind. 

 Article 1 of palpus micromammillated. 



Hypostome. — Wider beyond the middle, moderately long, notched apical- 

 ly. Denticles in a - / 2 pattern with about four in each file and limited to the 

 distal one-third. Length about 0.21. 



Folds. — Coxal and supracoxal folds present. Supracoxal fold reaching 

 anteriorly to the hood. 



Grooves. — Preanal, transverse postanal and median postanal grooves 

 present, the latter terminating at the transverse postanal groove. Dorso-ventral 

 groove absent. 



Sexual opening. — Placed at the level of the intervals between coxae I 

 and II. 



Eyes. — Absent. 



Anus. — In an oval frame. 



This species resembles talaje and kdleyi. From talaje it is distinguished by 

 being smaller, proportionately longer, more rounded on the posterior margin, 

 the marginal projection opposite coxa II less pronounced, the hood shorter, 

 and the depressed areas occupied by the discs are more shallow and less exten- 

 sive. From kelleyi it is distinguished by being proportionately shorter and 

 having the cheeks larger, as well as by having the hypostome wider beyond 

 the middle and the palpi having more hairs. 



HOSTS AND DISTRIBUTION 



This species is known from bat retreats in Arizona and Texas as follows: 

 Arizona. — 17875, from rock crevices in a bat-inhabited mine tunnel, May 

 25, 1940, Las Guijas, Pima County, 2 males, 1 nymph. 



Texas. — 17261, from guano and rock crevices in bat cave, Sept. 16, 1940, 

 near Concan, Uvalde County, several adults and nymphs. 



