74 Lieut. R. E.Vauglian and Staff-Surg. K. H, Jones 



Howlik, but the cover is dense and the trees are very lofty, 

 and the nests could not be located. 



On June 8tli it was heard at Macao and on the 12th at 

 Wing On^ twelve miles from Samshui_, so that it is fairly well 

 distributed. 



Chelidon lagopus. 



On March 16th, 1907, in the Happy Valley at Hong Kong, 

 large numbers of the House-Martin were seen in company 

 with Hirundo grdturalts. This is the only occasion on which 

 these birds were seen at Hong Kong, 



It is difficult to explain these unusual irruptions of birds, 

 but perhaps the dense fog, so common at Hong Kong in the 

 spring, or the encountering of a typhoon, may well cause 

 a species on migration to change its usual course or to come 

 down to earth when under normal conditions it would not 

 do so. 



COTILE RIPARIA. 



Sand-Martins occur both on the West and North Rivers 

 on their spring and autumn passages, but in spite of many 

 apparently very suitable localities they never stay to breed. 

 They are often in company with Hirundo gutturalis and 

 sometimes with Hirundo striolata. They pass on their way 

 north in A]}v\\ and JNIay, and on the return journey from 

 early in September until the end of October. 



Cotile sinensis was never obtained, though carefully looked 

 for. 



Hirundo gutturalis. 



Eastern Swallows appear at Hong Kong about the 8th or 

 10th of February, as a rule. They leave again in the first 

 or second week of August. 



These Swallows nest, as a rule, under the eaves of native 

 houses, and as they are believed to bring good luck are care- 

 fully protected by the Chinese at Hong Kong, but inland 

 apparently the Celestial idea is that they are unlucky. 



These birds are double-brooded ; the earliest eggs Avere 

 taken in jNIarch, while second clutches are laid in June. 



