Ifr2 BIRDS OK ILLINOIS. 



Aslur; tlilnl to fMiirtli >|iiiU InnKi'Xt; flrHl Hhortrr timn eighth or nintli; fouroutor anllU 

 with IliclrtimiT wi-l)» .'iinnati-d: tall I'oiibliliTiibly RlmrtiT tliun tlu' wIiib. xllRhtly omiir- 

 Kiniiti'il. tlic laliTuI i>alr uf foatliiTH loncfst. Foot Inriri' nnil roluiiit, when outstrefclicil 

 rtMK'liini; almost to tlic ''lul of tlii' tail; tarsi vi'ry rohust coniparcil to tho toes, about ono 

 anJ a lialf tiiiion as loinj as tin- luiiklli- toi-. tlu' frontal jiml |iost<'rlor rows of tmnsvorso 

 seutella" very (liatiiiot anil roiftilar; onti'r toe loncer than Inner; claws stronc. well 

 iMirvod, but not very aoutc. Spxi's aliki' In color: old ami yonni{i>luma<fi>B vorydlfforenl. 



Tills Bfnus Is iH'i-ullar to tropical Aniorli-a. and contains but two spoclos, tlio^. 

 niliiln (LathJ of South America and .1. pingiala (LlcBT.I of Middle America. 



Thisijenns .l.s/nriii<i Is closely related to I.eucoi>lerni!> Kaup. but dllTers lis follows: 



Aatnrina. First uuill lonRer than tenth. Tail oven or emarKlnate, tho lateral pair of 



rectrlci'S usually longest. Nostril docldodly horlzontiil. Youuk and adult cx- 



eecdinRly dilTcTcnt in plumnKO. 

 Lencopternis. First iiuill shorter than tenth. Tail slik'hlly rounded, the lateral pair of 



teallicrs shorti'st. Nostril nearly I'ircuiar. rathervortical than horizontal. YouoK 



and adult scarcely dinerlng in plumage. 



Asturina nitida plagiata (Licht.) 



MEXICAN GOSHAWK. 



JIttten plaoialii.i hicm. Xomencl. 1X51.:). 

 ,l.s/i()-iHn jilagiata StHLEG. Mus. P. B. Asturinie. 1W>2. 1.— ScL. & Salv. F,x. Orn. IS69, 

 17!). pi. !)0.— CouES. Key, 1ST2,21?: Check List, 1871, No. ;IV<(: id ed. 1K82. No. iiLT Ciilnoata") 

 Anttirina iiilida var. plaginta HlDOW. 1S7:1.— U. li. As li. Hist. N. Am. B. iil,lS74, 'HG. 

 Asliii-iiia nilida /ilaginln RlDOW. Nom. N. Am. B. 18S1, No. 445. 

 Aslufhin nilida Cars, in Baird's B. N. Am. 1S58, 35 (not Faico nilidus Latb.).— Baikd, 

 Cat. N. Am. B. 1S59, No. I«. 



Had. Whole of Middle .\merlca. south to Paiiania. north to southwestern border of 

 United States; accidental (?) in southern Illinois (Richland Co., cf. Rroow. Am. Nat. 

 .luly 1872, p. 430). 



Sp. Chab. .Ir/u/i moVp (No. 51. M.3. Mazatlan. Mexico: Ferd. BischofT). Above deep 

 (rather dark) cinereous, becoming paler and liner on the head above, where the feathers 

 have the shafts (finely) black; wings with indistinct lighter bars; rump almost black. 

 I'ppcr tail-coverts imnuK'ulate pure white. Tail pure black, tipped with pale grayish 

 brown (this passing terminally into white): about I'v inches from the tip is a continuous 

 band of while, halt an inch in width ; and a little over an inch anterior to this is another 

 narrower and less perfect one. Priranries approaidiing bhick at ends; the tips broadly 

 edgeil with dull white, as also the ends of secondaries. Head uniform line <lclieate 

 ashy. liei'ominK white on chin and throat, and approaching the same on the forehead; 

 shafts of feathers on head above, and neck, black; neck with indistinct paler transverse 

 bars, thi'se mo.st distinct on jugulum; the breast, abdomen, sides. Hanks, axillars, and 

 tibia; are regularly barred transversely with cinereous and pure white, the bars of each 

 al>out e<iual, the white, however, gradually increasing, and tho ashy bars narrowing 

 posteriorly, the tibia' being finely barreil: lower lail-eoverts immnculate pure white. 

 Lining of the wing white, with very sparse, faint, transverse zigzag bars next the axil- 

 lars and on larger coverts: under surface of iirimaries white anti'rior to their emnrgiim- 

 tion, boyiuid which they are more silvery, leaving al)out an inch of the terminal portion 

 black, the end of each, however, ashy; outer two quills crossed by narrow bars of ashy, 

 the rest with indications of the .same, near the shaft. Fourth iiulll longest: third scarcely 

 shorter; second shorter than fifth: first intermediate between eighth and ninth. "Length 

 Iti.OO; oxtent.38.W." Wing,10.50; tuil,7.00; tarsus.S.tiO; middle too, 1.50. 



