22. ICTERUS. 381 



Hah. Northern Colombia, Venezuela, Trinidad, Guiana, Cayenne, 

 and Upper Rio Negro. 



I have no evidence of the occurrence of any form of this species 

 at Panama or anywhere to the north of it (except the distinct 

 /. auratus of Yucatan), and there is much individual variation in 

 the amount of the white edges to the wing-coverts and secondaries, 

 as also in the slight white alar speculum at the base of the pri- 

 maries. Under these circumstances I have not adopted Mr. Hidg- 

 way's recently jaroposed division of this species into two subspecies, 

 " xantJiornus" and " Ihma'i," (Proc. U. S. Nat. Mus. 1884, p. 176). 

 The example that best accords with his character of /. wan- 

 thoniKs (ti/jnnis) is perhaps that from Santa Marta (k), which has 

 a white speculum. But this feature is also slightly shown in some 

 skins from Venezuela, Trinidad, and Cayenne, and does not seem to 

 be constant. 



a, b. Ad. st. British Guiana. Chev. Schomburgk [P.]. 



c. Ad. sk. Cayenne. Salvin-Godman Coll. 



d. Jr. sk. Cayenne. Sclater Coll. 



e. Ad. sk. George Town, Demerara Salvin-Godman Coll. 



(Brown). 



f. Ad. sk. George Town, Demerara Sclater Coll. 



(Broicn). 



g. Ad. sk. Demerara. J. R. Jackson, Esq. [P.]. 

 h. Ad. sk. Venezuela. Salvin-Godman Coll. 



i. (S ad. sk. Carupano, Venezuela Salvin-Godman Coll. 



(Goeriiu/). 



j. S ad. sk. Trinidad. Sclater CoU. 



k. 2 ad. sk. Santa Marta, U. S. C. Salvin-Godman Coll. 



(Simons). 



I. Ad. sk. South America. Sclater Coll. 



VI. Ad. sk. South America. Purchased. 



27. Icterus curasoensis. 

 Icterus curasoensis, Ridgw. P. U. S. N. M. 1884, p. 174. 



Similar to /. .ranthornus, but bill longer, more attenuated, and 

 more acute, the white markings of the wings much broader, and the 

 yellow colour paler. 



Hah. Island of Cura^oa, "VV. I. 



Only known to the author from the original description. The 

 points of difference from /. .rauthomus do not seem to be very 

 strong. 



28. Icterus dubusi. 



Icterus xanthornus, var. a. dubusi, Dubois, Bull. Ac. Belg. ser. 2, 

 xl. p. 790. 



Above yellow ; interscapulium slightly marked by narrow black 

 shaft-spots ; wings black ; lesser coverts black, with broad yellow 

 margins ; greater coverts and secondaries slightly edged with white : 

 beneath yellow ; middle of throat, extending to the breast, black ; 



