316 NOTES 



NOTE 17, p. 221. Migrating Swarm of Cirrochroa bajadeta. I 

 have seen this taking place in July at Miri in the Baram district, 

 Sarawak. C. H. 



NOTE 18, p. 235. A. R. Wallace and Mimicry of a Brenthid. The 

 statement was apparently not published by Wallace himself, and I 

 had some difficulty in verifying it. It is quoted by F. P. Pascoe, 

 evidently from information supplied to him by Wallace or noted on 

 a Wallace specimen (Trans. Ent. Soc., 3 Ser., III. [1864-9], P* IJ 3)- 

 E. B. P. 



NOTE 19, p. 250. Synchronous Flashing by Fire-Flies. See also 

 Edward S. Morse on " Fire-flies flashing in unison," in Science (N.S., 

 vol. XLIII., No. noi, pp. 169-170, Feb. 4, 1916), and K. G. Blair 

 on "Luminous Insects" in Nature (1915-16, XCVI., p. 411). It is 

 strange that the phenomenon should be so rare. Prof. Morse saw it 

 once fifty years ago in Gorham, Maine, but although he has been on 

 the look-out for it ever since, has never seen it again. E. B. P. 



NOTE 20, bearing on Plate XVII, facing p. 253, and XX, facing 

 p. 284. A Head-hunting Expedition in Recent Years. The following 

 account of "The Recent Troubles in the Rejang River" was con- 

 tributed by R. Shelf ord to The Sarawak Gazette, XXXIV. (1904), 



p. 211. 



" In the beginning of September [1904] information was laid at 

 Sibu to the effect that a party of forty-three Ulu Ai Dayaks from the 

 Yong, Chermin, Sut, Kapit and Palagus rivers had started off to 

 attack the Pimans in the Mujong River. Dr. C. Hose followed up 

 the party at once and succeeded in overtaking one boat containing 

 eight men who were brought back to Kapit ; a small force was sent 

 after the remaining thirty-five with instructions to arrest or to attack 

 them, the force however failing in its objective returned to Kapit. 

 Later in the month news was brought that the thirty-five Ulu Ai 

 had killed twelve Punans on the i5th, the slaughter being attended 

 with circumstances of revolting brutality. The Punans had enter- 

 tained the Dayaks overnight with their customary hospitality, but in 

 the morning the Dayaks fell on their hosts and killed all, men and 

 women indiscriminately ; one girl clung to her lover of the previous 

 night in the hope that he would spare her at least but she was 

 pushed off and struck down without mercy. On the 22nd Dr. C. 

 Hose again arrived at Kapit, this time determined to mete out 

 punishment with no sparing hand ; he found that one of the leaders 

 of the murderous gang had already been arrested in Kapit bazaar 

 by the orders of Mr. F. de Rozario, and small parties of loyal Dayaks 



