222 Bulletin American Museum of Natural History. [Vol. V, 



the afternoon. The stomachs of all killed contained the fruit of 

 the mangroves, of which there is an abundance at present." 



23. Loncheres castaneus, sp. nov. 



Similar in size and proportions to L. guiance, but differing from it in 

 coloration and cranial characters. 



External characters. Thickly spinous except on the ventral surface and 

 limbs, the spines strongly developed over nearly the whole dorsal aspect, 

 general color above orange-tawny, more intense on the front part of the head 

 and at the base of the tail, gradually paler on the sides, everywhere heavily 

 lined with black ; ventral surface Isabella color, finely lined with dusky, the line 

 of demarcation between the dorsal and ventral surfaces fairly well defined. 

 Upper and under surface of the limbs respectively similar in color to the adjoin- 

 ing portions of the body ; upper surface of hind feet paler, yellowish gray, 

 becoming nearly clear gray on the toes. Palms and soles naked, blackish. 

 Ears small, rounded, blackish, nearly naked. Tail (in the young) similar to 

 that of L. guiance, finely annulated, well-clothed for a short distance at the base, 

 the remainder nearly naked, the very short, dusky yellowish hairs only partly 

 concealing the annulations. 



The dorsal pelage consists of spines mixed with hairs, the spines coarse and 

 heavy over the median dorsal area, gradually becoming thinner and weaker on 

 the sides of the body, passing into grooved bristly hairs on the ventral surface. 

 The spines of the back are plumbeous at base passing into black on the apical 

 half, without orange-rufous tipping on the anterior half or third of the dorsal 

 region, but posteriorly subapically ringed with this color and minutely tipped 

 with black, the orange-rufous subapical ring becoming broader and conspicuous 

 posteriorly. On the sides of the body the spines are nearly uniform plumbeous 

 gray to the tip. The intervening hairs are coarse and bristly, blackish basally 

 and very broadly tipped with orange -rufous, this color usually occupying one 

 fourth to one-third the length of the hair, but with the extreme tip often black. 



Measurements. Head and body (adult female), 245 mm.; tail, j 1 hind foot, 

 40 ; ear from crown, 16. (Measurements from the fresh specimen.) A very 

 young specimen, in alcohol, measures as follows : Total length, 235 ; head 

 and body, no; tail, 125 ; hind foot, 29 ; ear from crown, n. 



Skull. The skull, in size and proportions, is almost indistinguishable from 

 that of /.. guiance, but differs in details, as will be presently noticed. Basal 

 length, 43 ; greatest breadth, 25.5 ; least interorbital breadth, 13 ; length of 

 nasals, 15.5 ; diastema, 11.5 ; length of upper molar series, 11.2. 



Type, No. ff J-, ? ad., Princestown, Trinidad, April 20, 1893, coll. Frank 

 M. Chapman. 



1 The tail is lacking. 



