APPENDIX. 



503 



C. H. Merriam, are quite different in color from the adtilt plumage. The head i.s 

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

 There is a near approach to iS. pygmcea in their ajipearauce. 



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

 lected at ToijultviUl', .Southern L'tali, liy .Mr. Heushaw, and in Southern Nevada 

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



Salpinctes obsoletus (1, l.'io). The range of this species has been remari;- 

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

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

 December, 1872, p. 23G. 



Catherpes mexicanus, vur. conspersus (I, 139). Xnmerous specimens 

 obtained in Colorado liy Mr. Allrn 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. C»u page 139 "it is noticed that it is a re- 

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

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

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

 paralleled in the Tliryotliorux 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 development of the 

 group ? 



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

 about twelve miles back of San Diego, the otiier the same distance back of San 

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

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

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



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

 Fla., are nuieh darker colored than those ft-om the Middle States (Maryland, Illi- 

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

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

 Kio Grande. 



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

 Fla., compares with one from Southern Illinois (No. 1,052, Mt. Carmel, Januai-y, 

 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 ochraceons beneath, 

 just about intermediate between Maryland and Florida specimens. Another 

 Florida specimen (No. 02,733, Mus. S. I. ; C. J. Maynard) measures : wing, 2. .50 ; 

 tail, 2.4-0 : culmen, .8-5. 



