BIRDS OF NORTH AND MIDDLE AMERICA. 49 
KEY TO THE SUBSPECIES OF ERIONOTUS PUNCTATUS. 
a. Smaller (wing averaging less than 71 in adult males, less than 68 in adult females); 
adult females with lateral under parts distinctly darker than median portion. 
b. Paler; adult female more olivaceous. (South America in general.) 
Erionotus punctatus punctatus (extralimital).¢ 
bb. Darker; adult female more tawny or rufescent. (British Honduras to western 
HCUad Of) ccsgntateecivin fe cee ee Erionotus punctatus atrinucha (p. 49). 
aa. Larger (wing averaging 72.1 in adult male, 70.1 in adult female); adult female 
with lateral under parts not distinctly darker than median portion. (Gorgona 
Island, Bay of Panama.) .....-..-.-..-.- Erionotus punctatus gorgonze (p. 52). 
ERIONOTUS PUNCTATUS ATRINUCHA (Salvin and Godman). 
SLATY ANTSHRIKE. 
Similar to T. p. punctatus, but adult male with gray of both 
upper and under parts darker and adult female with general colora- 
tion darker and less rufescent (more olivaceous), especially the 
pileum.° 
Adult male—Pileum black, more or less mixed with slate-gray 
on forehead (the latter sometimes extensively slate-gray barred or 
flecked with black); hindneck mixed black and slate-gray, some- 
times uniform black; back mixed black and slate-gray (the former 
predominating), the feathers extensively pure white basally; scapu- 
lars and rump plain slate-gray; exterior row of scapulars black, 
broadly edged with white; wings black, all the wing-coverts con- 
spicuously tipped with white, tertials broadly edged with white, the 
other remiges narrowly edged with light gray; upper tail-coverts 
black, broadly tipped with white; tail black, all the rectrices tipped 
with a large white spot, except middle pair, which are narrowly tipped 
with white or else wholly black; outermost rectrix, on each side, 
with a quadrate spot of white crossing outer web beyond middle 
portion;? superciliary region, sides of head and neck, and under 
parts plain gray (no. 6) or slate-gray, the sides of head (often chin 
@ [Lanius] nevius Gmelin, Syst. Nat., i, pt. i, 1788, 308, not of p. 304.—Tityra 
cayanensis, female! (Cayenne); Latham, Index Orn., i, 1790, 81.—Thamnophilus 
nevius (not of Vieillot, 1816) Swainson, Zool. Journ., ii, no. v, April, 1825, 90; Orn. 
Drawings, pl. 59; Sclater, Cat. Birds Brit. Mus., xv, 1890, 197, part.—E[rionotus] 
naevius Cabanis and Heine, Mus. Hein., ii, 1859, 16.—Zanius punctatus Shaw, Gen. 
Zool., vii, pt. ii, 1809, 327 (based on ‘‘ Le Tachet. Levaill[ant] Ois.”’ [pl. 77, fig. 1]).— 
(?) Thamnophilus nevius albiventris Taczanowski, Orn. du Pérou, ii, 1884, 9.—T[ham- 
nophilus] naevius naevius Hellmayr, Abh. K. B. Akad. Wiss., ii kl., xxii Bd., ili 
Abt., 1905, 659 (crit.). 
b See ‘‘Key,”’ top of this page. 
¢ This is an unsatisfactory subspecies, and I am doubtful as to its validity. 
Both very dark and light colored examples occur among specimens from Bogota, 
and I find it extremely difficult to correlate the color differences with geographic 
distribution. 
4 The second and third pairs (counting from outside) are sometimes similarly marked, 
81255°—Bull. 50—11——4 
