166 ANTHONY, New Birds from Lower California. pees 
In a large series of C. amp/us and C. m. frontalis | am unable 
to find either the grooved upper mandible or any approach toward 
parallel outlines on the basal third of the bill. The rosy colors 
in mcgregori are confined to definite areas, those of the head and 
rump being especially well-defined, and in none of my specimens 
is there any rosy suffusion over the upper parts, as is often the 
case with C. frontalis. There seems to be some variation in the 
intensity of the orange and rosy tints, some males being almost 
entirely orange over the rump, breast, and forehead, and one bird 
which escaped me seemed to be clear lemon yellow on those 
parts. 
McGregor’s Finch seems to be rather rare but well distributed 
over the island that we explored, the largest of the group of three. 
There is very little vegetation on this island, which is little more 
than a reef less than two (?) miles in extent, and it is rather 
surprising that a species of this genus should be found there 
at all. 
Thryothorus cerroensis, sp. nov. CERROs ISLAND WREN. 
Sp. char. — Ditters from Thryothorus leucophrys in much shorter bill, 
flanks less deeply gray, and upper surface darker. 
Type, No. 7391, adult, sex undetermined, coll. A. W. A., Cerros Island, 
Lower California, Sept. 3, 1896. 
Above sepia; chin, throat, superciliary stripe and middle of breast and 
belly grayish white; sides of neck, breast and flanks smoke gray; under 
tail-coverts grayish white with a buffy tinge, barred with black; tail 
blackish, middle feathers barred with black and clove brown; rectrices, 
except middle pair, broadly tipped with cinereous. Wing, 48 mm.; tail, 
55; exposed culmen, 11.5; depth of bill, 3; tarsus, 18. 
The present species needs comparison with none of our western 
species of the genus unless it be 7! /eucophrys, from which it is 
very easily separated by its much shorter bill, as well as other 
discrepancies in size, as will be seen from the accompaning table 
of measurements. From specimens before me taken at Rosalia 
Bay, 55 miles east of Cerros Island, the new species is easily 
separated by much more extensively gray lower parts, less heavily 
barred. The lower tail-coverts, and its tail-feathers have a terminal 
band of gray of not less than 4 mm., whereas the mainland bird 
