154 BIRDS OF THE REPUBLIC OF PANAMA — PART 2 



Arraijan, was in the top of a decayed palm stub, about 3 meters high. 

 The 3 eggs, now in the American Museum of Natural History, are 

 rather dull white, elliptical in form, with the shell faintly granular. 

 The measurements are as follows: 33.7x28.9, 33.9x29.6, and 

 34.6x29.8 mm. The nesting season may be irregular, as in 1948 in 

 Herrera I secured partly fledged young on February 28, March 12, 

 and March 23. 



Stomachs of those collected have been filled with finely broken 

 fragments of large orthoptera and large scarabaeid beetles. Hallinan 

 reported a specimen taken May 23, 1916, on Sosa Hill in the Canal 

 Zone, that had many leaf-cutting ants in the stomach. 



OTUS CHOLIBA CRUCIGERUS (Spix) 



Strix crucigera Spix, Av. Spec. Nov., vol. 1, 1824, p. 22, pi. 9. (Rio Amazonas, 

 Brazil.) 



Characters. — Larger; male, wing 166-173, tail 85.9-92.4; female, 

 wing 172-179, tail 92.8-96.5 mm. ; averaging slightly darker in color 

 on upper surface. 



Measurements. — Males (5 specimens), wing 166-173 (170), tail 

 85.9-92.4 (89.0), oilmen from cere 13.7-14.5 (13.9), tarsus 33.7- 

 35.0 (34.8) mm. 



Females (3 specimens), wing 172-179 (176), tail 92.8-96.5 (94.7), 

 oilmen from cere 14.8-15.2 (15.0, average of 2), tarsus 33.8-35.6 

 (34.8) mm. 



Resident. Recorded in the Archipielago de las Perlas on Isla del 

 Rey and Isla Pedro Gonzalez. 



The specimens available to me, all collected by W. W. Brown, Jr., 

 on Isla del Rey, include 7 in the Museum of Comparative Zoology, 

 and 1 (obtained by exchange) in the American Museum of Natural 

 History. Bangs (Auk, 1901, p. 25) reported that the collector had 

 taken a pair from a hole in a dead tree on May 8, 1900. The others 

 were secured in February and March 1904. Rendahl (Ark. Zool., 

 1920, pp. 31-32) recorded a male, taken by Bovallius, on Isla Pedro 

 Gonzalez, April 24, 1882, with measurements of wing 173 and tail 

 96 mm., that agree in size with the small series from Isla del Rey. 

 There is no recent report from the Pearl Islands. 



The larger size of these birds compared to luctisonus of the main- 

 land is obvious from the tabulation of measurements. They also are 

 darker in color. In both of these elements they resemble the subspe- 

 cies crucigerus widely spread from the upper and middle Magdalena 

 Valley in central Colombia east to Venezuela, the Guianas, and the 



