Riley — Four New Birds from Celebes. 57 



Lamprocorax montosa, sp. nov. 



Type, adult male, U. S. National Museum, No. 250,903, Rano Lindoe, 

 Celebes, March 6, 1917. Collected by H. C. Raven (original No. 3721). 



Similar to Lamprocorax minor, but feathers of the throat, jugulum, and 

 sides of neck almost plain shining green, only a slight purplish sheen seen 

 in certain lights; averaging slightly smaller. Wing, 99; tail, 59.5; culmen, 

 16; tarsus, 21; middle-toe, 17.5 mm. 



Remarks. — The above species is founded upon eleven males, eight 

 females, and three immatures, all taken at the type locality, March 4-16, 

 1917. For comparison I only have three females of Lamprocorax minor 

 from Pendek and Tobea Islands, Buton Strait. There appears to be little 

 difference in the sexes, the female only being smaller and duller than the 

 males. The series of Lamprocorax montosa is quite uniform, the purplish 

 sheen on the throat and jugulum being faint and only seen in a favorable 

 light and absent or nearly so from the sides of the neck. 



In Lamprocorax minor the purplish sheen is much more pronounced on 

 the throat and jugulum and even extends to the side of the neck; it is also 

 apparently larger. The type of Lamprocorax todayensis (a female) from Mt. 

 Apo, Mindanao, resembles Lamprocorax montosa very much, but the feathers 

 of the throat and jugulum are more lanceolate and the purple sheen is still 

 fainter, almost lacking; the wings are duller. I attach no importance to the 

 latter, as the series of L. montosa, shows that as the plumage fades the 

 iridescent green of the wings disappears and they become brownish and the 

 backs steely. Lamprocorax todayensis and montosa are both mountain 

 forms derived from the same stock, probably Lamprocorax minor, but as 

 the latter appears to be even a later immigrant from the south into Celebes, 

 it is better to treat them all as species for the present until more is known 

 of their distribution and relationship. 



