30 Bulletin American Mi seum of Natural History [Vol. XL VII 



stricted at axillae and pectoral area to about the median third or fourth of thorax, 

 thence expanding to cover the lower abdomen and inside of thighs, usually darkest 

 on middle of breast and lighter on throat, middle of thorax and mid-lower abdomen. 

 In extreme specimens this portion of the ventral surface has a decided rufous tone. 

 Sides of head from base of rostrum, expanding upward to enclose the ears, sides of 

 neck and sides of body to base of tail (encroaching deeply on sides of abdomen and 

 nearly meeting over thorax), brownish rufous or chestnut slightly varied with black- 

 tipped hairs. Top of head and mid-region of back to base of tail more varied with 

 black-tipped hairs, which from the withers posteriorly take the form of four longi- 

 tudinal blackish bands, which from middle of back to base of tail are broken by four 

 or six transverse rows of whitish spots, which vary in tone (in different specimens) 

 from clear white to pale buffy white. Over this area the general effect is that of 

 alternating transverse rows of rather sharply defined black and white spots, about 

 five of each being rather distinctly defined, with an additional posterior row of two 

 white spots at the base of the tail, and an ill-defined anterior row of small, less dis- 

 tinct, whitish spots. There is also a tendency to an additional lateral row of indis- 

 tinct or subobsolete whitish or pale buffy spots on each side of the usual four distinct 

 median rows of spots. Counting all the rows of white or whitish spots they form 

 six longitudinal rows, the outer rows separated from the others by dark chestnut 

 instead of blackish intervals. 



No. 49463, Niapu, November 24, 1913, adult d\ and No. 49477, Niapu, 

 December 1, 1913, adult d", may be taken as typical of the light or reddish phase. 

 In general tone No. 49477 is lighter, with the dorsal spots clearer white, than No. 

 49463. 



The dark phase (Plate I, lower figure) may be thus indicated: 

 Light portion of the underparts much paler, or faintly yellowish white ; the sides 

 of head, neck, and body dull dark brownish, almost without trace of rufous except 

 around ears and on sides of neck; top of head and mid-region of back grizzled yellow- 

 ish gray with most of the hairs broadly black-tipped; the back from the posterior 

 part of thoracic region to base of tail with deep black predominating, the whitish 

 spots reduced in size and usually rather clear white, and the longitudinal and trans- 

 verse bands indistinct or blended into a black or blackish general ground color, 

 the black most concentrated along the median line. 



This phase is typically represented by No. 49487, Niapu, December 4, 1913, adult 

 9 . No. 49490, adult 9 , same locality and date, has more rufous suffusion on sides of 

 neck, nape, and shoulders. 



Each phase is typically represented by both males and females taken 

 on consecutive days, or sometimes on the same day, at the same locality. 

 Other specimens collected actually or approximately at the same date 

 and place, equally representative of both sexes and strictly comparable 

 as to age, fill every gradation between the two extremes. Hence the 

 types of coloration above described can scarcely be considered as repre- 

 senting respectively a definable red and dark phase, but merely the ex- 

 tremes of a wide range of purely individual variation, shown in the 

 accompanying colored plate. 



