APPENDIX. 



503 



C H. Merriam, are quite different in color from the adult plumage. The head is 

 pale dull ashy, instead of light hair-brown, and the colors are duller generally. 

 There is a near approach to iS. jyi/ffmcta in their ai^pearance. 



Campylorhynchus brunneicapillus (I, 132). This species has been col- 

 lected at Toquerville, Southern Utah, by Mr. Heushavv, and in Southern Nevada 

 by Mr. Bischoff, naturalists to Lieutenant Wheeler's expedition. 



Salpinctes obsoletus (1, 135). The range of this species has been remark- 

 ably extended by the capture of a specimen in Decatur County, Southern Iowa, 

 where others were seen, by Mr. T. M. Trippe. See Proc. Boston Soc. N. H., 

 December, 1872, p. 236. 



Catherpes mexicanus, var. conspersus (I, 139). Numerous specimens 

 obtauied in Colorado by Mr. Allen and Mr. Aiken, and in Southern Utah by Mr. 

 Henshaw, establish the fact of great uniformity in the characters of this race, and 

 its distinctness from var. mexicanus. On page 139 "it is noticed that it is a re- 

 markable fact that this northern race should be so much smaller than the Mexican 

 •one, especially in view of the fact that it is a resident bird in even the most 

 northern parts of its ascertained habitat." As we find this peculiarity exactly 

 pai-alleled in the Thryothorus ludovicianus of the Atlantic States (see below), may 

 not these facts point out a law to the effect that in species which belong to essen- 

 tially tropical families, with only outlying genera or species in the temperate zone, 

 the increase in size with latitude is toivard the region of the highest develojwient of the 

 group ? 



Dr. Cooper met with two specimens of this species in California in 1872 ; one 

 aboTit twelve miles back of San Diego, the other the same distance back of San 

 Buenaventura, and both at the foot of lofty, rugged mountains. Their song he 

 compares to loud ringing laughter ; it is so shrill as to be heard at quite a distance, 

 and seems as if it must be produced by a much larger bird. 



Thryothorus ludovicianus (I, 142). Specimens of this species from Miami, 

 Fla., are much darker colored than those from the Middle States (Maryland, Illi- 

 nois, and southward), as might be expected ; but very strangely, they are also 

 much larger. In colors they very nearly resemble var. berlandieri, from the Lower 

 Rio Grande. 



A specimen in Mr. liidgway's collection (No. 1,864, January 9), from Miami, 

 Fla., compares with one from Southern Illinois (No. 1,652, Mt. Carmel, January, 

 1871) as follows : — 



In coloration they are more nearly alike, the Florida specimen being hardly 

 appreciably darker on the upper surface, though the lower parts are much deeper 

 ochraceous, almost rufous. The Illinois specimen is deep ochraceous beneath, 

 just about intermediate between Maryland and Florida specimens. Another 

 Florida specimen (No. 62,733, Mus. S. I. ; C. J. Maynard) measures : wing, 2.50; 

 tail, 2.40 ; culmen, .85. 



