18(3 



Collector's notes. 



Eyes brown. Stomacli contained caterpillars and other insects. 

 These birds are generally distributed over the island, bat are found 

 especially in the sheltered caiions 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 

 lieard 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, nobis. 



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 portion 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-l.yo ; tail, 1.80 ; bill, 0.45-0.50 ; tarsus, 0.70-0.75 ; middle toe, 0.50. 



BemarJcs. — This Wren appears to bear about the same relation to T. 

 iewicki leucogaster that J tinco insidaris does to J. 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. beivicM spil/urns 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. bewicM leucogaster is still more conspicuous. 



T. BKEVICAUDA. 



Nat. Museum 

 No. 



Original No. 



Age and 

 sex. 



Wing. 



Tail. 



Bill. * 



Tarsus. 



Middle toe. 



70041 



1.5 

 15 





1.90 

 1.85 



1.80 

 1.80 



0.50 

 0.45 



0.70 

 0. 75 



0.50 



T0042 





0.50 









iT. BEWICKI SPILUEUS. 



249 







2.00 

 2. .30 



2.00 

 2.50 



0.40 

 40 



0.80 

 0.80 



0.45 



127 1) 







0.48 















* Fiom nostril. 



