626 NYCTINOMOPS. 
585. femorosaccus (Nyctinomous), Merr., N. Am. Faun., No. 2, 1889, 
a 23r 
PALM SPRINGS FREE-TAILED Bat. 
Tvpe 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, 
shghtly 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, 11; 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, 11; 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. 
Philly 1902, ps soe 
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, 11.6; 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. 
