246 BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 



tic in outline when viewed from above, the outer lobe larger than 

 inner. Molars strictly normal ; m l and m 2 with hypocone indicated 

 by thickening of posterior portion of inner segment ; m 3 with well- . 

 developed second commissure, but no trace of third ; m x and m 2 with 

 low protoconid and high entoconid, m 3 with protoconid as in the 

 other teeth, but with entoconid practically absent. Skull rather 

 slender and rounded, the lachrymal breadth less than length of ros- 

 trum, which in turn is about three-fourths that of braincase; depth 

 of rostrum about equal to that of braincase ; sagittal crest barely in- 

 dicated ; antorbital foramina opening conspicuously forward, but not 

 surrounded by noticeable ridges; palate slightly domed, but its lon- 

 gitudinal concavity less than the lateral; anterior portion of palate 

 entire or with two minute foramina; basisphenoid pits large, sepa- 

 rated by a narrow median ridge; audital bullae less emarginate on 

 inner side than usual in the family Molossidse. External form with 

 no striking peculiarities ; ear extending not quite to nostril when laid 

 forward, broadly triangular in general outline, the keel very low and 

 antitragus small; tragus rather large for a member of the group, 

 flattened, evenly rounded above ; anterior bases of ears near together 

 on forehead; muzzle pad verjr slightly indicated, its ridges without 

 horny processes; front of upper lip thickly beset with very slender 

 spoonhairs; both upper and lower lip scarcely expanded and little 

 wrinkled; wings, legs, tail, and membranes of the usual Molossine 

 type. 



Species examined. — Eomops whitteyi (Scharff). 



Remarks. — This genus, immediately recognizable among Molossine 

 bats by the peculiar form of the lower incisors, more closely resembles 

 the South American Molossops than it does any of the known Old 

 World groups. The unusually slight emargination of the audital 

 bullae is a somewhat primitive character, and the backward prolonga- 

 tion of the crown of the lower incisor strongly suggests the Phyllo- 

 stomidae, but in other respects the genus is strictly Molossine. 



While there is no question as to the distinctness of Eomops from 

 all currently recognized genera, I feel some doubt as to its relation- 

 ship to the Myopterus of Geoffroy. This genus, based on an animal 

 supposed to be from Senegal, was determined by Peters to be the same 

 as the South American Molossops at a time when the existence of a 

 bat of this kind in the Old World was unknown. During my visit 

 to Paris, in 1905, the skull of the type (all that remained when it was 

 seen by Peters in 1869) could not be found; but from the figure pub- 

 lished by Gervais ° and the measurements given by Peters,? it is evi- 

 dent that in cranial characters the animal was much more like 

 Eomops than Molossops. This is shown by the general outline of the 



o Hist. Nat des Mammif., I, p. 221. 



o Monatsber. k. preuss. Akud. Wissensch., Berlin, 1809, p. 402. 



