268 DR. KNIID ANDKRSEiV ON HATS. [Api'. 7, 



who, on extracting the skull of one of the specimens, found it to 

 have I molars ; thus the only difference between D. eva and 

 A . j . jamaicensis to be derived from Cope's description proves to 

 be imaginary. According to liehn, the skull measures 27'6 mm. 

 (total length), the zygomatic width 17, the forearm 62, tibia 24, 

 foot 14, measurements which fall completely within the limits of 

 A. j. jamaicensis. Cope found the interfemoral "notched to a 

 line opposite the middle of the tibia " ; Rehn writes that it is 

 " of ranch greater expan.se than either [in] perspiciUahis or 

 planirostris," and this is evidently his only reason to keep 

 " D. eva " separate ; but there is in this respect a very great 

 individxial variation: in 7 spirit- specimens of A. j. jaonaicensis 

 from Jamaica the length of the intei'femoral, measured in the 

 middle line, varies between 11 "2 and 19 mm. ; a similar variation 

 is found in specimens of A . j. jamaicensis from other places, as well 

 as in other races of the species. A. j. jamaicensis occurs west 

 of tSt. Martins (Porto Rico) and east of St. Martins (St. Kitts), 

 so that also from this point of view there is not much proba- 

 bility that St. Martins individuals differ from the true A. j. 

 jamaicensis. 



J. A. Allen's ^4. coryl, 1890. — Based on a single specimen, taken 

 on St. Andrew's Island, Caribbean Sea, Feb. 12, 1887, by one of 

 Mr. C. B. Cory's collectors. It was described by Allen (I. s. c.) 

 as a distinct species on account of its colour : — " General color 

 above dark seal brown (brownish black), but very little lighter 

 at the base than at the surface ; no trace of white streaks on the 

 face." Forearm " 50*1 mm." {sic); third metacarpal "56 mm." 

 (or " 55 mm.," see p. 171 of Allen's paper). 



There are three skins of '■'■ A. coryV in the British Museum, 

 from the same island as the type specimen, taken by the same 

 collector, on the same date. Their coloration is as described by 

 Allen, but on examination of their teeth they prove to be 

 youngish, though full-grown, individuals (teeth perfectly un- 

 worn) ; this accounts sufficiently for tlieir dark coloration, which 

 is indistinguishable from that of youngish specimens of A. j. 

 jamaicensis from Jamaica, Porto Rico, S. Mexico, &c. (and of 

 any other race of A. jamaicensis, the South American forms not 

 excluded). The absence of facial stripes is due, partly to the 

 fact that St. Andrew's individuals belong to the northern gi-oup 

 of races of A . jamaicensis, in which these stripes are generally 

 wanting or but faintly developed ; partly to the fact that the 

 individuals obtained by Cory are young adults, in which the 

 facial stripes ai-e generally wanting or still more faintly indicated 

 than in specimens of more advanced age. — Allen's measurement 

 of the forearm, viz. 50*1 mm., is incorrect, and the explanation of 

 the error is no doubt this : in the three British Museum speci- 

 mens the proximal part of the radius has been cut away by the 

 taxidermist ; presumably the same is the case in Allen's specimen, 

 since it is from the same collector and place ; the true length of 

 the forearm, judging from the length of the metacarpals, would 

 be about 60 mm., as in an average A. j, jamaicensis. — On p. 171 



