12 ARKIV FÖR ZOOLOGI. BÄND 11. NIO 12. 



Fam. Bucerotidae. 



Bycanistes cristatus R-upp. 



Of this form quite a young specimen has been examined. 

 As is known, the young of the Bucerotidce are very clumsy 

 and do not move much about in the nest. This also seems 

 to be confirmed by the almost entire absence of any pointed 

 dermal papillse on the metatarsal joint, which, however, is 

 considerably thickened and swollen. The pads thus formed 

 are covered with a large number of rounded or hexagonal 

 scales, the sides of which are sh'ghtly raised above the level 

 of the middle parts, like those found in the Coraciidce. 



Fam, Upupidae. 



Upupa epops longirostris Jerd. 



A quite well-marked pad is visible in a young specimen 

 from Northern Siam. The shape of the papillae is somewhat 

 different from those found in the Alcedinidce. The tubercles 

 are fewer in number on the uppermost part of the heel than 

 on the lower part, where they are much smaller and merge 

 into the scutes of the tarsi. In the middle of the pad there 

 is a fairly deep emargination. At the anterior part the pa- 

 pillae are irregular, and the largest are situated along the 

 sides, encircling a few smaller ones. Below the emargination 

 the tubercles are placed in almost horizontal rovvs, and the 

 whole pad is narrowed off posteriorly. In length it measures 

 8 mm, and is then considerably smaller than those of the 

 Alcedinidce, as compared with the general size of the birds. 



Upupa epops pallida Erl. 



In a female specimen collected in Algeria 1910 the dermal 

 papillae are almost worn off, why it seems that the specimen 

 is nearly adult. On the uppermost part of the pad, they 

 are, however, clearly visible, especially above the emargina- 

 tion already mentioned as being present in Upupa epops 

 longirostris Jerd. The papillae seem to be quite similar to 

 those described in that species (vide antea). 



