FAMILY VIREONIDAE 



235 



Measurements. — Males (7 from Chiriqui and Costa Rica), wing 

 52.0-59.0 (55.5), tail 40.8-44.8 (42.1), culmen from base 12.7-14.8 

 (13.7), tarsus 15.2-17.4 (16.7, average of 6) mm. 



Females (6 from Chiriqui and Costa Rica), wing 50.3-57.0 (54.6), 

 tail 39.9-46.0 (42.4), culmen from base 12.4-14.1 (13.4), tarsus 15.9- 

 17.9 (16.9) mm. 



Resident. Griscom (Bull. Mus. Comp. Zool., vol. 78, 1935, p. 364), 

 referring to this bird as nominate oehraceiceps, lists it for "Western 

 Chiriqui (Pacific Slope)." Bangs (Proc. New England Zool. Club., 

 vol. 3, 1902, p. 59) mentions a male collected by W. W. Brown, Jr., on 

 the Caribbean slope of Volcan de Chiriqui, at 1200 m, on June 11, 1901. 

 The only place I have encountered this race is at El Volcan, where on 

 March 15, 1965, a pair flew into a mist net set at 1200 m at Palo Santo. 

 Ridgely netted 2(1 collected) on the upper Rio Chiriqui (Fortuna 

 Dam site) at 1200 m on March 4, 1976. The only Bocas del Toro re- 

 port is of 1 mist-netted by Loftin's banders at Almirante on October 19, 

 1965; the bird was examined in the hand by Eisenmann and released. 

 Beyond Panama this race ranges to Honduras. 



Skutch (Pacific Coast Avif. no. 34, 1960, pp. 35-38) has watched 

 H. 0. pallidi pectus at its nest in Costa Rica, where the breeding season 

 starts at least as early as March. The 2 nests Skutch found were 2 and 

 6.5 m off the ground; each was a typical vireo cup attached by cobwebs 

 to a fork in a sapling. The nest he took apart for examination had an 

 outer covering of moss, a layer of fine, light-colored bast fibers, a thick 

 layer of long soft seed plumes, and a thin lining of more bast fibers. 

 The 2 young in one nest observed by Skutch were brooded by the fe- 

 male and were fed insects by both parents. The parents seemed to feed 

 the young less frequently than do Lesser Greenlets, and the young left 

 the nest at 13 or 14 days of age, slightly later than do young Lesser 

 Greenlets. 



The only nest described from Panama was found by Eisenmann 

 (Condor, 1962, p. 507) near El Hato, western Chiriqui on July 13, 

 1949, but eggs had apparently not yet been laid; it was 1 m from the 

 ground and covered on the outside by green moss. 



HYLOPHILUS OCHRACEICEPS NELSONI (Todd) 



Pachysyhia oehraceiceps nelsoni Todd, 1929, Proc. Biol. Soc. Washington, 42, 

 p. 195. (Lion Hill, Panama). New name for P. o. brevipennis Nelson, 1911, pre- 

 occupied by Helinai brevipennis Giraud, 1852 — HylopJiilus decurtatus (Bona- 

 parte, 1838.) 



Characters. — Upper surface brownish olive; less buffy below than 



