_Characters._--Adult male: "Above grayish-brown, very finely vermiculated, more rufous on the back, with large longitudinal streaks and a few cross markings; scapulars partly with pale buff bands, mostly pale gray at the basal portion; primaries deep brown, with a white spot to the inner web of the first primary not extending to the shaft, second and third primary with fine spots to the inner web extending to the shaft and obsolete white spots to the outer web, fourth primary with a smaller and less pure white spot; chin and throat blackish brown, barred with rufous, with two white spots on the throat; breast brownish gray, vermiculated and spotted with brown and blackish; abdomen dirty ochraceous buff barred with brown, the bars wider on the lower tail-coverts; retrices rufous-brown with blackish bars, outer ones with broad white terminal spots." (Hartert, 1892:545.) Bill basally whitish with black tip; feet blackish pink; iris dark brown. Adult female: According to Hartert (1892:545) similar to male, but with small, more or less obsolete, rufous-buff (not white) spots on the primaries; rectrices without white spots. Immature: Resembles adult but paler and less distinctly marked. _C. i. phalaena_ resembles _C. i. jotaka_, but is paler; the male is more broadly barred and more buffy on abdomen and under side of tail; the female has paler spots on wing. _Measurements._--Measurements of four males: wing, 161-168 (165); tail, 118-129 (124); culmen, 22; tarsus, 14.0-15.1 (14.5); of four females: wing, 161-165 (163); tail, 118-127 (123); culmen, 22; tarsus, 14.5-15.6 (15.1). _Specimens examined._--Total number, 8 (4 males, 4 females), as follows: Palau Islands, USNM--Koror, 3 (Nov. 3, 20, 29); AMNH--exact locality not given, 5 (Oct., Nov., Dec.). _Remarks._--This subspecies of the Jungle Nightjar is restricted to the Palau Islands and particularly to those islands possessing damp, shady forests and mangrove swamps. In September, 1945, two birds were observed at the edge of a mangrove swamp at Garakayo at twilight by the NAMRU2 party, but neither of them was taken. Coultas (field notes) found the nightjar in mangrove swamps. He writes that they remain quiet there during the daylight hours. He took specimens both in the evening and at dawn. He considers the bird as not very common. Marshall (1949:208) obtained specimens at Koror in 1945. Among the races of _C. indicus_, the coloration of _C. i. phalaena_ resembles most closely that of _C. i. jotaka_; probably _C. i. phalaena_ was derived from _C. i. jotaka_ of Asia. Apparently this bird arrived at the Palaus by way of the Philippines. It is found only in these islands of Micronesia and maybe another one of that group of species which reached the Palaus without expanding their ranges farther into Micronesia.