LA SELVA-BRAULIO CARRILLO MAMMALS 21 



Fig. 9. Gray four-eyed opossum, Philander opossum. Photo by B. L. Clauson. 



by a predator. On the evening of 30 March, a P. opossum was seen at 1 .5 m height 

 in a bush adjacent to the Rfo Cantarrana at 280 m. Four-eyed opossums were 

 reported eight times near La Selva between February 1979 and April 1988 (see 

 account of Metachirus nudicaudatus) . 



Ticks found on P. opossum include Amblyomma sp. (one nymph) and Ixodes 

 venezuelensis (one nymph). Ixodes venezuelensis , a species in which males are 

 unknown, is herein reported in Costa Rica for the first time based on this specimen 

 and on our single specimen from M. mexicana. 



Specimens examined (3)— Puerto Viejo, Rio Sarapiqui, 300 ft [1 male, 

 UMMZ]; 1 km S, 11.5 km E of San Miguel, 680 m [1 male, 1 sex?, FMNH]. 



