no 



NORTH AMKKICAN UIIIDS. 



s|ic('iiiR'iis, aidt'il liy tlio imjxutniit (.'ondnsiims of Mr. Ilaiicock (Annals and 

 Maj;a/.iiiu of Natural llisLiay, lM srr., XIH, IK); Lomlciii, IS.'U), Sclilcgi'l 

 {Jut/cditi. 'i,yi\\s6nu\ (I'llisloirc! Naliiivllc ilos I'ays-lias, IHfJL'j, I'clzcln (rcliiT- 

 sit'lit ilcr Cioicr und Falken di'V Kaisisrlicliun (unitlioldj^iscliuii Sainniliuij;, 

 i\]tril, IHd;!), and AllVcd N'l'wton (Ilisli)iy of IJritisli IJirds, icvi.sod cd., jiait 1, 

 Juiu", ItSTl, ])]). ."id-.")!', and I'mc. Acad. Nat. Sr. riiiladclpliia, .Fuly, 1<S7I, 

 ])]). '.i4, ',)'}), in tlicir important itapcrs la'aiini,' upon tlii.s .sidiject, wliit'li, tlioup;li 

 tliey oacli c.\pies.s tlie pccnliar individual views of the writer, tu^'ether clear 

 \\\) pretty .sati.sfaetorily the jadlileni of the nnniber, character, and haliitats of 

 the .several races, as well as the dill'erent phases of variation to which each is 

 subject. 



fi488,9. 



Faico polijagrus. 



Fako sacer. 



In studying the F. Innarius, I have experienced most discourcaging dif- 

 ficulties from the Avant of sullicieiit series of the Old World races, and I'roni 

 the unsatisfactory character of most desciiptions and iigures of them, besides 

 being much perplexed by the confusion of their .synonymy by ditVercnt 

 authors. Tn conseiiuence of this, my diagnoses of the four races of which 

 alone I have seen examples may be very unsatisfactory as regards the 

 charactc's by which tliey may be most readily distinguished. Having seen 

 the adult of oidya single one of these four races, I am therefore compelled to 

 base my differential characters upon the immature stages. 



In addition to the four races of /'. faiitirii(s characterized above, there are 

 several geognii)hical forms belonging to tlie Old World, chiefly intertropical 

 Asia and Africa. These are the var. hahi/lonicKs, Scl. and Irby, (Gray's Hand 

 List, I, ]). 20, No. 17.'>,) of Southeastern Europe and Western Asia ; var. harla- 

 rus, L. ((Jray's Hand List, i>. 20, No. 174), of Northern Africa ; and var. 

 (((niipteruf^, Licht. (dray's Hand List, No. 17")), of both the preceding regions, 

 which ^Fr. Gurney wi-ites me "is sini])ly the intertropical race of F. fniiNrins, 

 from which it only differs in being of a darker shade throughout." The F. 



