1922.] TRINIDAD BIRDS. 171' 



northern range and in the semi-gloom near the bottom of this, and 

 ten to fifteen feet above the level of the water seven nests were found. 

 One of these contained one moderately large youngster and another 

 three young, all with short black feathers just showing. Three or 

 f9ur pairs of adult birds were seen. 



Although the bottom of the canyon was gloomy there was 

 sufficient light for the seeds dropped by the birds to germinate m the 

 guano and produce small green forests of palm seedlings on the ledges 

 a few feet above the level of the water. These would be washed 

 away by the first floods of the wet season, which was already 

 commencmg. 



I was not aware at the time that the Guacharo had ever been 

 recorded as nesting in such situation, but later I found that Wall and 

 Sawkins in their Geology of Trinidad (1860) p. 29 say one nesting 

 place of the Guacharos " at Acono, is not in the limestone at all, being 

 produced by the water having eroded a passage through very hard 

 mica slates which arch over the stream. 



I made a close search of the Acono Valley (a branch of the 

 Maracas Valley) and found one spot exactly similar to the Arima 

 Valley locality and apparently quite suitable for the Guacharos, but 

 none were present. A small breeding locality like this could easily 

 be exterminated by the treatment to which these birds are usually 

 submitted by the natives when discovered. 



I heard rumours of a number of other localities, where there 

 were said to be nesting places of the Guacharo, several being on the 

 north coast, but these are the only ones about which the information 

 has been verified or is sufficiently certain to be worth recording. 



It might be as well to record here that in connection with the 

 visit of Mr. Urich and myself the following have been described from 

 our collections made in the Oropuche Cave. 



Diptera. 



Trichobius coecus. Edwards. (Annals & Mag. of Natural 



History Series 9. Vol. I (1918 p. 424) on a bat. 

 Erioptera troglodyta. Edwards. (I.e. p. 425) sitting on 

 walls of the cave. 

 Chilopoda. (Centipedes.) 



Psalliphora cavincola. Chamberlain, (Bull. Museum- 

 Comparative Zoology Cambridge Mass. Vol. LXII- 

 p. 168) on the walls of the cave. 

 Onychidae (Woodlice). 



