94 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



am Dot autoptically acquainted, but which appears to be a northern 

 form of G. tricolor^ or, possibly, a local race of C. anrifrons dnhius ; (3) 

 C. tricolor (Wagl.), which in some specimens so closely approaches G. 

 aiirifrons lioffmanni that it is often difficult to decide to which a given 

 specimen should be referred ; and (4) G. terricolor, Berlepsch, which is 

 possibly a local race of G. tricolor. Tn the following synopsis, I have 

 subordinated as subspecies only those forms which are known with 

 certainty to iiitergrade, all of which belong to C. aurifrons. Those of 

 doubtful relatiouship are treated as species, since it seems best to ac- 

 cord them that rank until it can be proven they are not entitled to it. 

 Two more or less apocryphal species referred by Malherbe {Monographie 

 dcs Picidees, ii, 1802) to this genus, Picus gerini, Temm. and P. auroca- 

 pillns, Vig., are not included in the synoptical table, but a transcription 

 of Malherbe's account of these supposed species is given at the end of 

 this paper. 



LITERATURE. 



The genus Genturus has received special attention, so far as I have 

 been able to discover, from but three authorities, viz, Malherbe, Ca- 

 banis, and Sundevall, whose arrangements of the species, with the equiv- 

 alent names of the present synopsis, are given below in chronological 

 order. Also, as showing the latest arrangement, the names adopted in 

 Sclater and Salvin's Nomenclator Avium Neotropicalium. 



(1.) MALHERBE (1862). 



Mouograpliie ties PicidcSes, etc., etc., par Alf. Malherbe. 4 vols, folio. Metz : 1861-2. 

 [The genus " Zebrapicus " ( = Centurua) ia treated in yoL ii (text), pp. 223-250, 

 and vol. iv (plates), pll. — . ] 



1. Zebrapicus suptrcUiaris, p. 223, pi. 102, figs. 1,2, and 4. = C. supcrciUaris. 



2. " elef/ans, p. 225, pi. 102, ligs> 5, 6. =^ C. elegans. 



3. " jJ^<c7^era?)J, p. 227, pi. 103, tigs. 1,2. (^ Melanerpes puclierani.) 



4. " hypopoVms, p. 228, pi. 103, figs. 4, 5. = C hypopolius. 



5. " (je)'imi, p. 231. {^=, Melanerpes pwcheranif) 



5. " striatus, j). 231, pi. 107, figs. 2, 3. := C. striatus. 



6. " carolinus, p. 234, pi. 103, ligs. 7, 8. = C. caroUnus. 



7. " radiolatus, p. 237, pi. 104, figs. 5, 6. = C. radiolatus. 



8. " aurifrons, p. 240, pi. 104, figs. 1, 2, 3. = C. aurifrons. 



9. " santa-eruzi, p. 241, pi. 105, figs. 4, 5. = C. aurifrons santa-crusi. 



10. " erythroplithalmus, p. 243, pi. 105, figs. 1,2. = C. aurifrons dubius. 



11. " haupii, p. 245, pi. 106, figs. 4,5. = C. tiropygialis. 



12. " tricolor, p. Ii47, pi. 106, figs. 1, 2. = C. tricolor. 



13. •' rubriventris, p. 248, lA. 107, fig. 1. = C. rulriventris. 



14. " aurocapillus, p. 250. (Unidentified.) 



(2.) CABANis (1862). 



Ubersicbt der iui Berliner Museum befindlicben Vogel von Costa Rica. <^Jour. fur 

 Orn. Heft v, x. Jabrgang, September, 1862, i)p. 321-336. [A synopsis of the species 

 of Ccnturus, with synonymy and critical remarks, is given on pp. 322-330.] 



1. C. aurifrons, p. 323. = C. aurifrons, as restricted. 



2. C. carolinus, p. 324. =: C. carolinus. 



3. C. albifrons, p. 324. = C. aurifrons saiilacruzi and C. aurifrons 



dubius. 



