Collector's notes. 
Eyes browu. Stomach contained caterpillars and other insects. 
These birds are generally distributed over the island, but are found 
especially in the sheltered canons of the middle portion, where they are 
numerous. They also frequent the slaughter-yards, where goats are 
killed, to glean insects from the drying bones. Their notes are often 
heard early in the morning, when the birds mount some prominent rock 
or stump. Their general habits are not peculiar. April 5,1875, a female 
was taken, with the nest and eggs. The nest was built on the ground, 
beneath a rock, which sheltered it from the prevailing winds; it was 
lined with goat’s hair, and contained two fresh eggs; a third, nearly 
ready to be laid, was found on opening the bird. Another nest, con¬ 
taining three eggs, was found in a crevice of a large rock, some 5 feet 
high. The fissure was about 18 inches deep; and being more capacious 
than was necessary for accommodation of the nest, was divided by a par¬ 
tition, which the birds had built across it, leaving an interior space for 
the nest, and an aperture just large enough for the birds to pass with 
ease. This partition, which effectually blocked up the passage to the 
nest, was composed of pebbles. A third nest was discovered so far 
under a large solid rock, and with so small an entrance, that it could 
not be secured. The passage to this nest was also blocked with small 
stones. 
3. THRYOMANES BREVICAUDA, noMs. 
Sp. CH. —Adult: —Above grayish hair-brown, brownest on the rump, 
grayest on the tail; remiges just perceptibly, and tail-feathers very dis¬ 
tinctly, transversely barred with dusky ; three lateral tail-feathers light 
dull gray terminally, with one or two broad dusky bars across the anterior 
portion of the gray. A very conspicuous white superciliary stripe from 
the nostril to the occiput; below" this a grayish-brown stripe, covering 
the lore and widening on the upper posterior jiortiou of the auriculars. 
Lower parts white anteriorly, passing gradually into dull ash-gray on 
the sides and abdomen; crissum broadly barred with black. Wing, 
1.85-1.90; tail, 1.80; bill, 0.45-0.50 ; tarsus, 0.70-0.75 ; middle toe, 0.50. 
Remarlis .—This Wren appears to bear about the same relation to T. 
l)ewichileucogasteri\i‘(\t Junco insularis does ioJ.annectens; and it is a curi¬ 
ous fact that the analogue of each should be the form from the interior of 
the continent instead of that from the neighboring coast. This insular 
form is much grayer than the T. heicield sjnlurus of California and 
Western Mexico, and presents other decided differences from all the 
continental forms. The following measurements of specimens of the 
two forms show how greatly they differ in dimensions and proi)ortions; 
the difference from T. beicicJci leucogaster is still more conspicuous. 
T. BREVICAUDA. 
Nat. Museum 
No. 
Original No. 
Ago and 
sex. 
Wing. 
Tail. 
Bill. * 
Tarsus. 
Middle toe. 
70041 
70042 
15 
1. 90 
1. 80 
0. 50 
0. 45 
0. 70 
0. 75 
0. 50 
0. 50 
15 
1.85 
1.80 
T. BEWICKI SPILUUCS. 
249 
2. 00 
2. 00 
0 40 
0 ftO 
1276 
2. .30 
2.50 
0 40 
0. 80 
0. 48 
* From uosti il. 
