Mf:(iAI.0G1.0S!5LS. 741 



Membranes inserted at base of tiisfc jjbalanx of second toe, or at 

 corres[)()nding point of tliird toe, of between second and lliird toe ; 

 vertical fascise of iresopatagiuni, as cio.s.sed by tbe main internal 

 cutaneous line, relatively tew {{)- 13, as in Eonycteris) and rather 

 widely spaced. All digits relatively consideiably longer than 

 in Eoinjctcris, index of tirst digit 401) {Eont/cter'ts ■i'J-i), eecond 

 7-56(679). third 1><35( 1722), fourth 1456 (i:i76), tilth l;il9 (1161); 

 greater length of second to tilth digits due chiefly to a lengthening 

 of all the metacarpals and of the proximal phalanx of the third 

 and distal of the fourth and tilth digits ; owing to this, the distal 

 phalanx of the fourth and fifth digits become, as a rule, longer 

 (while in Eomjctcris they are shorter) than the proximal phalanx 

 of the same digits (compare table below, showing in upper line the 

 wing-indices of Aleyaloijlossus, calculated from seven adult indi- 

 viduals, in lower those of Eonycteris). — Other external characters 

 as in Eomjcteris, except for the denser liairing of the base of the 

 forearm, tibia, and central interfemoral, and the stronger develop- 

 ment and paler (cream or ochre-butf) colour of the neck-tufts iu 

 adult males. 



Se.vual difft-reatiation. — Adult males wilh well-developed neck- 

 tufts, forming a ruff of jiale-coloured hair across foreueck strongly 

 contrasting with fur of throat and breast. Xeck-tufts entirely 

 absent in adult females (and immature males). 



Ilahitx. — Unknown. 



Aljinitics. — rhylogenetically Mir/iiloa7o.<>sus occupies a position 

 intermediate between Eonycteris and Macroyhssus. In several 

 characters it has remained on almost exactly the saine level as 

 Eonyct ris, viz. in the relatively slight deflection of the braiu- 

 case (strongly deflected in AlacroyhssKs), the relatively short 

 symphysis of tho mandible (longer in Macroylossus). the large size 

 of p' and p_^ (reduced in Macroylossun), and in having the fifth 

 metacarpal (index ()70) considerably shorter than the third (760), 

 the fourth intermediate (716) (in Macroylossus all three metacarpals 

 eubequal). But it is more specialized than Eonycteris in the 

 following respects, viz. the slenderer rostrum and longer tongue, 

 the fusion of the premaxillae, the very narrow (linear) cheek-teeth, 

 and the reduction of the tail. In all of these latter chai'acters it is 

 (Hiite or very nearly on a level with Macroylossus. 



* 111 Mciiploylos.--u!- «itli i-law. 



