626 NYCTINOMOPS. 



585. femorosaccus (Nyctinomous), Merr., N. Am. Faun., No. 2, 1889, 



P- 23- 

 PALM SPRINGS FREE-TAILED BAT. 



Type locality. Agua Caliente, Palm Springs, Riverside County, 

 California. 



Geogr. Distr. Riverside County to Ensinada, Lower California, 

 Mexico. Extent of dispersion unknown. 



Genl. Char. Incisors ^; lower incisors bifid and crowded, first 

 upper premolar small; second with a very large and high antero- 

 internal cusp; ears thick, keel greatly developed, with a large lobe on 

 its lower third; antitragus higher than long, convex anteriorly, 

 slightly concave posteriorly, and separated by a deep notch; tragus 

 subquadrate; tail more than half exserted; gular sac present; wing 

 membrane from below middle of tibia, and the fur extends out, above, 

 and beneath, as far as a line drawn from the middle of the humerus to 

 the junction of the middle and outer thirds of the femur. (Merr., 1. c.) 



Color. Dull brown. 



Measurements. Total length, 114; tail, 44; foot, n; ear from 

 base of antitragus, 21 ; forearm, 46; tibia, 14; third finger, metacarpal, 

 45; first phalanx, 20; second phalanx, 17.5. Skull; total length, 

 19; Hensel, 15; zygomatic width, n; interorbital constriction, 3.5; 

 width of braincase over zygomata, 8.5; palatal length, 7.5; length of 

 upper molar series, 5; length of lower molar series, 4. 



586. yucatanicus (Nyctinomops), Miller, Proc. Acad. Nat. Scien. 



Phil., 1902, p. 393. 

 YUCATAN FREE-TAILED BAT. 



Type locality. Chichen Itza, Yucatan. 



Genl. Char. Similar to N. europs., but ear larger, and teeth 

 larger; ear not thickened at edge; antitragus large, higher in propor- 

 tion to its width than in N. europs. 



Color. General hue uniform Vandyke brown, the under parts 

 tinged with wood brown; ears and membranes dark brown. 



Measurements. Total length, 98 ', tail, 42; forearm, 42; thumb, 

 8; second finger, 40; third finger, 81; fourth finger, 60; fifth finger, 

 42; tibia, 12.4; foot, 9; ear from meatus, 15; from crown, n.6; width, 

 17; tragus, 1.8. Skull: greatest length, 17.2; basal length, 15; inter- 

 orbital constriction, 3.4; zygomatic breadth, 10; breadth of braincase, 

 above roots of zygomata, 8.8; mandible, 12.4; maxillary tooth row, 

 6.4; mandibular tooth row, 7. 



587. gracilis (Dysopes), Wagn., Arch. f. Naturg., 1843, p. 368. 

 GRACEFUL FREE-TAILED BAT. 



Type locality. Cuyaba, Matto Grosso, Brazil. 



