328 bulletin: museltm of comparative zoology. 



about in the hotter parts of the day. The specimens trapped were all 

 taken in early morning or before evening. Hawks catch many of 

 them. 



Sundevall's description was drawn from specimens collected on the 

 White Nile by Hedenborg, and appears to apply well to the series 

 from Sennar. The body measurements of adults are larger than he 

 gives, however, for the average of three adults is : — head and body 

 163 mm., tail 149, foot 35, ear 19. Apparently A. abyssinicus does 

 not occur west of the Abyssinian border. At all events, persistent 

 trapping failed to discover it; nor did Lord Lo vat's expedition across 

 Abyssinia find it farther west than Sellen and Goodur in the high 

 country at the head of the Blue Nile. 



AcoMYS ciNERACEUS HeugUu and Fitzinger. 

 Gray-footed Spiny IMouse. 



Acomys cineraceus Heugl. and Fitzinger, Sitzb. Kon. akad. wiss. Wien, math.- 

 nat. cl., 1867, 54, pt. 1, p. 573. 



Two species of spiny mice were collected by the expedition. The 

 one is a broad-footed, shorter-tailed animal, inhabiting all the low 

 flat country of the Blue Nile Valley; the other is a slender-footed, 

 longer-tailed species which we found only at Fazogli in the rocky hills 

 which begin here at the Abyssinian border. The former I have referred 

 to Heuglin's A. cineraceus; Heuglin's type locality is Doka, in eastern 

 Sennar, between the Atbara and the Rahad Rivers. The original 

 description is brief and refers to a figure pre\dously published by 

 Heuglin. In his "Reise" (1877), however, he gives a more detailed 

 accoimt, with measurements, which agree in all essentials with those of 

 an immature specimen taken at Adreiba, a day's march above Roseires 

 on the Blue Nile. We were fortimate in obtaining a second adult speci- 

 men, much farther down the river at El Mesharat. Apparently it is a 

 widely distributed species but was difficult to obtain m the dry and 

 barren plains over which we journeyed. There can be no doubt that 

 Heuglin's type was an immature animal, ha\'ing the entire dorsal 

 area a smoky gray, palmg slightly at the sides. The feet he states 

 are marked with the same color on their outer portion. The measure- 

 ments given are:— head and body 3" 3'" (= 82.5 mm.), tail 2" 6'" 

 (= 69 mm.), ear 6'" (= 12.6 mm.). Our immature specimen meas- 

 ures:— head and body 78 mm., tail 67. The ratio of tail to head and 



