20 ARKIV FÖR ZOOLOGI. BAND 13. N:0 8. 



as absolutely correot, as the distribution of the measured 

 birds within the range of variation may easily enough be 

 only a chance, when the material is not greater. 



I am inclined to think, that the southern birds certainly 

 show a tendency to a larger size and a more slaty colour 

 of head, throat and chest than the northern ones, but that 

 it is impossible to determine a distinct limit between them, 

 because they blend into each other. 



As I have not had the opportunity of comparing a suf- 

 ficient material, I have to leave the question open with 

 these remarks, imtil additional material can* decide it de- 

 f inetely one way or the other. 



99. Trogonurus curucui tenellus Cab. — 1 J", Nic, San 

 Juan del Norte, No v, 4. 



100. Galbula melanogenia Scl, - 1 J". C. R., Tala- 

 manca, Sipurio, Sept. 6; 1 5, C. R., Siquirres, Ca no Secco, 

 Sept. 30; 1 J!» Nic., San Juan del Norte, Marcb 16. 



101. Monasa grandier Scl. et Salvin. — 1 J", 1 ?, 

 C. R., Siquirres, Sept. 25. 



102. Ramphastos swainsoni Gould. — 1 J", C. R., Si- 

 quirres, Sept. 25. ?>Iris greyish brown.» 



103. Ramphastos piscivorus brevicarinatus Gould. — 

 1 J', C. R., Talamanca. Sipurio, Sept. 4; 1 J^, skull, Nic., 

 Zapatera, no date. 



The skull from Zapatera is of a large specimen, liaving 

 the culmen 150 mm. 



101. Pteroglossus torquatus torquatus Gm. — 1 $, Nio., 

 G. Zapatera, April 16. 



The present specimen has the feathers on the upper 

 parts of the head tipped with brownish, giving these parts 

 a brownish tint. The pattern of the bill is sharply defined. 



105. Celeus castaneus Wagl. — 1 J^ (U. Z. M.), C. R., 

 Siquirres, Caiio Secco, Aug. 18. 



106. Centurus subelegans wagleri Salv. et Godm. -- 

 1 J", Pa., Pacora, March 3. 



