40 Proceedings of the Biological Society of Washington. 



Characters.— A small species, like the other West Indian forms. Skull 

 about the same size as in Eptesicus cubanus (smaller than in E. weimorei, 

 larger than in E. bahamensis) , its general outline broader than in any of 

 the related insular species. Color dark, essentially as in E. cubanus. 



Measurements. — Head and body, 61; tail, 40.4; tibia, 18.0; foot, 10.5; 

 forearm, 44.7; thumb, 7.4; third finger, 75; fourth finger, 67; fifth fin- 

 ger, 58; ear from meatus, 14.2; ear from crown, 12.6; width of ear, 

 11.5; condylobasal length of skull (teeth moderately worn), 16.4; zygo- 

 matic breadth, 11.7; interorbital constriction, 4.2; lachrymal breadth, 

 6.4; breadth of braincase, 8.0; depth of braincase at middle, 5.4; man- 

 dible, 12.3; maxillary toothrow (exclusive of incisors), 6.2; mandibular 

 toothrow (exclusive of incisors), 7.0. 



Specimens examined. — The type, from Constanza, Santo Domingo, and 

 two imperfect skulls from Port de Paix, Haiti. 



Remarks. — The Eptesicus of Haiti and Santo Domingo is a well charac- 

 terized form. Its relationships are with the small Cuban and Bahaman 

 animals and not with the large race occurring in Porto Rico. The char- 

 acters of the Porto Rican form, however, can not at present be clearly 

 understood. The type is immature (skull with basal and palatal sutures 

 not fully closed; those of the nasals obliterated) and the second known 

 specimen is still younger. On the basis of this material I have been un- 

 able to find any character that distinguishes the animal from Eptesicus 

 fuscus. The color appears to be darker than in average specimens of E. 

 fuscus from the eastern United States, and the upper canines seem less 

 robust; but it is impossible to decide whether these peculiarities are 

 constant. 



Monophyllus cubanus ferreus, subsp. nov. 



Type. — Adult male (skin and skull) No. 219151 U. S. National Museum. 

 Collected in a cave 8 miles W. S. W. of Jeremie, southwestern Haiti, 

 December 7, 1917, by Dr. W. L. Abbott. 



Characters. — Like Monophyllus cubanus cubanus, but color of upper- 

 parts clear dark hair-brown with a slight metallic gloss and with no 

 obvious trace of the buffy-brown or fawn-color characteristic of the Cuban 

 race. Measurements as well as cranial and dental characters apparently 

 identical with those of true M. cubanus. 



Measurements. — Type: head and body, 65; tail, 4; tibia, 17; foot, 11; 

 forearm, 39; condylobasal length of skull, 19.8; mandible, 14.0; max- 

 illary toothrow exclusive of incisors, 7.6; mandibular toothrow exclusive 

 of incisors, 7.8. 



Specimens examined. — Twenty-four (two skins), all from the type 

 locality. 



