14 ARKIV FÖR ZOOLOGI. BAND 11. N:0 12. 



Fam. Caprimulgidee. 



It is rather curious that in a quite young specimen of 

 Capnmiilgus macrurus Horsf. the naked part of the meta- 

 tarsal joint is covered by a number of smooth pentagonal 

 scales which are plaoed in 8 regular rows, the anterior of 

 which consists of a single scale. The next row is composed 

 of 2 scales, which are slightly larger than the former. The 

 middle and posterior rows generally consist of 4 scales, though 

 one or two smaller ones may be wedged in between the 

 other. The mode of nidification of the Caprimulgidce is 

 quite different from that of the former families dealt with, 

 and it is therefore rather unexpected, that some remains of 

 a heel-pad are still visible among the Caprimnlgidce. 



Fam. Cypselidae. 



Apus apus Linn. 



Of the Common Swift T have been able to examine two 

 specimens, the one quite young and the other slightly older. 

 As could be expected the pads in the Cypselidce are not very 

 well-marked, though traces may be still clearly visible. In 

 the youngest specimen examined, there is a pad about 4 mm 

 in length. This pad is composed of a great number of small 

 irregular scales though quite devoid of any pointed tubercles. 

 In the other specimen the pads are also present, though the 

 scales are very much worn off, and the whole pad only looks 

 like a swollen thickening, in which the separate scales are 

 ill-defined. 



Fam. Psittacidse. 



A 14 days old specimen of Melopsittacus undulatus Shaw. 

 has been used for examination, and in this specimen there is 

 a well-defined pad on the metatarsal joint, though it is ab- 

 solutely devoid of any pointed tubercles. As is known, the 

 tarso-metatarsus is covered all över with a number of small 

 granular scales. The metatarsal joint is covered with gran- 

 ular scales too, but these scales are much larger than the 



