BIRDS OF NORTH AND MIDDLE AMERICA. 175 



i. Length of culmen much less than difference between length of 



■wing and length of tail Agelaius (p. 319) 



a. Length of ciilmen much greater than difference between length of 



wing and length of tail Nesopsar (p. 344) 



hh. Ninth primary longest or equal to longest; lateral claws reaching 



beyond base of middle claw Xanthocephalus (p. 346) 



d(L Longest tertials produced beyond tips of adjacent secondaries; outer toe 

 (w"ithout claw) not reaching beyond subterminal joint of middle toe. 



( Trujnah's.) Leistes (p. 350) 



C(\ Hallux much longer than lateral anterior toes; middle jihalanx of middle 



toe longer than terminal phalanx; outer toe (without claw) not reaching 



to second (subterminal) joint of middle toe. {Sturnelhr. ) .Sturnella (p. 353) 



aa. Only two primaries (the eighth and seventh) with outer web sinuated; rectrices 



conspicuously acuminate; wing-tip more than twice as long as culmen; middle 



toe, with claw, much longer than tarsus; claw of middle toe longer than the 



terminal phalanx; hallux with its claw longer than the digit. (DoUcJiony- 



ces. ) - Dolichonyx ( y>. 369) 



Genus ZARHYNCHUS Oberholser. 



Eucorystes^ (not of Bell, 1862) Sci.atek, Ibis, 5tli ser., i, Apr., 1883, 147. (Type, 



Cacicus wagleri Gray). 

 Zarhynchus^ OBERHOLiiiiR, Yroc. Acad. Nat. Sci. Thila., .lune 2, 1899, 215. (For 



Eucorystea, preoccupied. ) 



Larg-e arboreal Icteridse with the hill iiiueh lonovr than the head, 

 much swollen Ija.sall}, forming a broad rounded frontal shield; the 

 primaries long and attenuated terminally; coloration gloss}" black and 

 dark chestnut, the tail )nostly yellow. 



Bill much longer than head, elongate-conical, doclinate, acute, much 

 swollen basally, its depth at base decidedl}^ less than half the length of 

 culmen, decidedly less than length of gon3's, its basal width about one- 

 third the length of culmen, or a little less; culmen straight or nearly 

 so in middle portion, gently decurved terminall}^, more or less arched 

 and sometimes slightly elevated basally where broadly expanded, form- 

 ing a rounded frontal shield, the posterior end of which reaches as far 

 backward as middle of eye, its greatest width equal to about half the 

 distance from nostril to tip of maxilla; gon\-s nearly straight, decid- 

 edly shorter than distance from nostril to tip of maxilla; mandibular 

 rami much widened and swollen posteriorly, the posterior outline 

 oblique, slightly convex; commissure nearly straight, but slightly 

 decurved both basally and terminallv. Nostrils situated much below 

 the lateral median line of the maxilla, small, broadly oval or roundish, 

 bored into the horny rhinotheca, beveled otf anteriorly, and separated 

 distinctly from the loral feathering. Wing long (about three and one- 

 third times length of culmen), with long and pointed tip (much longer 

 than culmen); outermost (ninth) primaiy intermediate between fifth and 

 fourth, the seventh, or seventh and sixth, longest; four outer primaries 



1 "Ev, bene, et Kopv6ri)<i, galeatus." '^ From ?a, valde, and pvyxoi, rostrum. 



