314 NOTES 



made can hardly help sometimes finding itself round branches, even 

 if not deliberately used for the purpose." E. B. P. 



NOTE 6, p. 53. Egg of lite Frog-Mouth. So far as we know, eggs 

 are turned over periodically during incubation, and adhesion to the 

 nest would render this difficult. Specially directed observation is 

 required. H. B. 



NOTE 7, p. 53. The nests of Collocalia lowi are bought by the 

 Chinese at from $80 to $100 a pikul (133^ Ibs.), those of C.fuciphaga 

 at from $10 to $20 a kali (i^ Ibs.). C. H. 



NOTE 8, p. 84. Change of Colour on Immersion in Formalin. The 

 author's experience with the snake may be compared with Dr. G. B. 

 Longstaff's Chameleon, C. dilepis, which assumed its palest colora- 

 tion "a uniform pale yellowish colour" when chloroformed. 

 Butterfly-hunting, etc., 1912, p. 216. E. B. P. 



NOTE 9, Plate XIII, facing p. 105. The Flying Frog. The author 

 had intended, but was unable, to include Frogs in Chapter IV. 

 Among his drawings, however, were found the two figures on this 

 Plate. Mr. Boulenger, F.R.S., informs me that the upper figure is the 

 Bornean Flying Frog, Rhacophorus nigropalmatus, and that it is well 

 worth publishing. A description of the Flying Frog is given by 

 Wallace (with a figure) in his Malay Archipelago (pp. 59-61, vol. I., 

 1869 edition), and by M. Siedlccki, of Krakau, in Bull. Acad. des Sci. 

 de Cracovie, 1908, pp. 682-89, and in Biol. Centralblalt, Leipzig, 

 XXIX. (1909), No. 22, pp. 704-14 ; No. 23, pp. 715-37. In flying, or 

 rather gliding, the limbs are held so close to the body that the feet 

 make one continuous surface with it, while the lungs are strongly 

 inflated. The frog can alter its direction in the air by powerful 

 strokes with its hind legs. 



Mr. Boulenger cannot decide whether the lower figure represents 

 the tadpoles of the same species, but it certainly shows the de- 

 velopment of some tree-haunting species which, like Rhacophorus, 

 surrounds its eggs with a mass of froth enclosed between leaves. 

 E. B. P. 



NOTE 10, p. 115 . The Common Cockroach found wild in Russia. 

 Mr. North has kindly looked up the reference. The full title of the 

 paper is " Adelung (N. von) Beitrage zur orthopteren fauna der 

 siidlichen Krim, pp. 388-413." The section referred to deals with 

 Slylopyga orientalis, L., pp. 401-2. The author remarks that of 

 nineteen specimens examined all were taken in the open under 

 dead leaves and sticks. E. B. P. 



