( 364 ) 



F. q. qidxensis (Cornalia), from Eastern Ecnador, has the white apical spots 

 on the greater wing-coverts nearly as large as /•'. q. con.wbrina, but the white ends 

 of the outer rectrices are rather longer, and the dimensions greater. The female, 

 moreover, differs at a glance from those of F. bicolor, microsficta, and consobrim 

 by having the throat and sides of the head, like the pileum and back, black 

 with a slight gloss, while, in its allies, the throat is ferrnginous or chestnut-rnfons 

 like the rest of the belly, the sides and top of the head are slate-grey, etc. 



All the black-and-white Formiciwrae represent each other geographically, and 

 are therefore more proi)erly designated by trinomials. 



247. Myrmeciza hemimelaena pallens Berl. & Hellm. 



[Mynmcisahemiimlaeiia Sclater, Pn,c. Z'uil , Snc. Loml. xxv. 18.i7. p. 48 (1867.— Bolivia).] 

 Formicicom nijicnuda (nee Mi/iolhem riificaudo Wied, 1831) Pelzeln. Zur Oni. Bras. ii. p. 155 



(1868.— Eagenho do Gama, Villa Bella de Matogrosso, Western Matogrosso) ; Hellmayr, 



Verhaiull. Zool.-But. Gesellsrh. Widi liii. 1903. p. 213. 

 Myrmeciza henumdaena pallem Berlepsch & Hellmayr, Journ.f. Omith. 1005. p. 32 (January 1905.— 



Matogrosso). 

 Drymophila jurnaim Ihering, Rerist. Miis. Paiilist. vi. 1904. p. 442 (May 1905.— Rio Jurui : new 



name for F, nifii-audH Pelz. preoccupied). 



Nos. 247, 311, 319. dS ad., ^ imm., Calama, 22, 31. vii., 1. viii. I'.iOT.— Wing 

 56—57; tail 38; bill 15 mm. 



No. 555. (? ad., Jamarysinho, 15. ix. 1907. — Wing 56 ; tail 34 ; bill 14 mm. 



Nos. 970, 1022. c? J ad., Maruius, 4, 16. vii. 1908.— Wing 57—58; tail 34—36; 

 bill 14i— 15 mm. 



Nos. 263, 316. ? ? ad., Calama, 24. vii., 1. viii. 1907.— Wing 53, 54; tail 

 37, 39; bill 14i mm. 



No. 567. ? imm., Jamarysinho, 18. ix. 1907.— Wing 54 ; tail 35^; bill 14 mm. 



No. 980. ? ad., Maruius, 9. viii. 1908.— Wing 55 ; tail 35 ; bill 14 mm. 



" Iris brown, feet flesh-colour, light yellow or greyish yellow, bill black." 



The males differ from a series of M. //. hemimelaena from Bolivia and Sonth- 

 Eastern Peru by their paler, cinnamomeous instead of castaneous, colour of the 

 back and wings, clearer cinnamon-rnfons tail, and much lighter, fulvescent, not 

 deep rnfescent brown, flanks. Besides, the black is restricted to the throat and 

 foreneck (while, in the typical race, it is continued over the chest), and the white 

 area on the breast and middle of abdomen much more exten(led. The other 

 character alluded to by Berlepsh it Hellmayr, viz. the colour of the pileum and 

 nape, however, does not seem to be quite constant, for one or two specimens from 

 the Rio Madeira are not different on this score from typical M. h. hemimelaena 

 from Bolivia. 



The females are always readily distinguishable from those of the latter form 

 by having the throat and foreneck very much paler, ochraceous instead of 

 ferruginous, the middle of the belly nearly white instead of ochraceous buff, and 

 all the upper parts much lighter-coloured. 



The range of the two forms is as follows : — 



(a) M. hemimelaeni hemimelaena Scl. 

 North Bolivia: San Mateo, Yungas of Cochabamba (G. Garlepp— Mns. 

 H. V. B.), Yuracares (U'Orbigny *). South-Eastern Peru: Marcapata, Cnzco (0. 



* TliammjiJiilus yuttn/ii^- (eiiore !) U'Urbigny, Voyage, Oireaux p. 177. -1 have examined D'Orbigny's 

 original example, an adult male, in the Paris Museum, and found it identical with others from 

 S.E. I'eru. 



