180 



U. S p. R, E. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



List of specimens. 



MYIARCHUS COOPERI, Baird. 



Tyrannula cooperi, Kaup, Pr. Zool. Soc. 1851, 51, (not of Nuttall.) 



Sp. Ch. — Width of bill above grayisli olive. Throat and upper part of breast light ash gray ; rest of under parts pale sulphur 

 yellow. Two light-colored bands on the wings ; the primaries, except the first, margined externally and internally with rufous. 

 Tail feathers rufous, the outer webs, and a stripe on the inner side of the shaft e.xtending in a straight line to the tip, brown. 

 This inner stripe is a little wider than the outer web on the outer feather, but diminishes somewhat to the central ones. 

 Length, 8.50 ; wing, 4 ; tail, 3.90 ; tarsus, .95. 



Hab. — Mexico. 



This species of flycatclier is very similar to M. crinitus, and, in fact, occupies a position inter- 

 mediate in color between it and mexicanus, though larger, perhaps, than either. The superiority 

 in size over M. crinitus is chiefly noticeable in the tarsus, which is about .12 of an inch longer, 

 and in the bill ; the wing is, however, shorter. The third quill is longest ; the second and fourth 

 but little less ; the first a little longer than the seventh. The coloration is much the same 

 with mexicanus, being considerably paler and grayer than crinitus. The yellow of the breast is 

 a little deeper than in mexicanus, and the throat a very little darker. The upper parts are like 

 mexicanus, and there is a decided pure gray shade on the forehead and on the back of the neck, 

 and to a less extent on the rump. 



This species differs from crinitus, as stated, in the larger bill and tarsi, and shorter wings, 

 with a much paler tint of coloration. Both have the tail similar in the continuation of the 

 reddish of the tail to the extreme tip, instead of having this tip brown as in mexicami.fi. The 

 tail is more nearly evenj however, and the brown stripe on the inside of the shaft is wider than 

 the outer web on the exterior feather, as wide on the second, and gradually diminishing to tlie 

 fifth, where it is about one-fourth the width of the outer web. In M. crinitus the brown stripe 

 on the inner web is scarcely half the width of the outer web, and quite pale. On the fifth 

 feather it does not cross the shaft at all ; while in some specimens this color is scarcely appreci- 

 able on the inner webs of any but the exterior i'eathers. The bill is quite black. 



From mexicanus this species is distinguished by the larger size and much broader bill 



