FAMILY FORMICARIIDAE 23I 



HYLOPHYLAX NAEVIOIDES CAPNITIS (Bangs) 



Hypocneiiiis naevioides capnitis Bangs, Proc. Biol. Soc. Washington, vol. 19, 

 July 10, 1906, p. 107. (Volcan Miravalles, Costa Rica.) 



Characters. — Back somewhat darker ; sides and flanks slightly 

 darker gray ; subterminal black tip on tail narrower, with the 

 rufescent brown on the end darker; female more grayish on under 

 surface ; averaging slightly larger. 



Measurements. — Males (10 from Veraguas, Nicaragua, and Costa 

 Rica), wing 60.4-65.0 (62.9), tail 31.4-36.6 (34.5), culmen from 

 base 17.2-18.1 (17.6, average of 9), tarsus 22.0-23.3 (22.5) mm. 



Females (10 from Veraguas, Nicaragua, and Costa Rica), wing 

 59.6-640 (61.7), tail 30.4-33.4 (31.7), culmen from base 16.1- 

 18.5 (17.7), tarsus 22.0-23.5 (22.7) mm. 



Resident. Found in restricted number near Santa Fe, Veraguas, 

 on the Pacific slope, and in Bocas del Toro, from the Rio Sixaola 

 westward, inland on the Rio Changuena (at 700 meters) ; ranging 

 east on the Caribbean slope of northern Veraguas to the valley of the 

 Rio Calovevora. 



A male collected by von Wedel near Guabo (beyond Chiriquicito, 

 inland from Chiriqui Grande) April 8, 1928. was the first published 

 report of this race for Panama (Peters, Bull. Mus. Comp. Zool., 

 vol. 71, 1931, p. 321). There are, however, two specimens, male and 

 female, in the Havemeyer collection in the Peabody Museum at New 

 Haven, taken earlier by Austin Smith at Sibube, inland on the Rio 

 Sixaola, February 12, 1927. Others in the American Museum of 

 Natural History were collected by R. R. Benson near Santa Fe, 

 Veraguas, in March and April 1925, and near the Rio Calovevora on 

 the Caribbean slope of northern Veraguas in August and September 

 1926. A male in the National Museum was taken by R. Hinds, 

 September 23, 1961, at about 700 meters elevation on the upper Rio 

 Changuena, Bocas del Toro. The race is more common in eastern 

 Costa Rica, where in the low mountains in the north it crosses to the 

 head of the Pacific drainage. 



The Veraguas specimens, while slightly intermediate, are placed 

 with capnitis. 



Dr. A. M. Young (Condor, 1971, pp. 367-368) records an inter- 

 esting observation on sleeping habits made at Finca La Selva, on the 

 Caribbean slope of Costa Rica. From February 4 to May 30. 1970, 

 a male was found frequently at night "3.2 m. off the ground on a 

 horizontal branch of a leafy small dioecious tree. . . . This spotted 



