Olive-backed Thrush at Summer Home. 133 



Besides spruce bud moths, I saw the OHve-backed Thrushes 

 feed to the young a large glow worm larva, I think, wild fruit, 

 crane flies, flying ants, grasshoppers, orange worm-like larvae, 

 cut worms, all colored inch worms, geometrid moths, yellow- 

 green caterpillars, gray-green caterpillars, tan, brown, black 

 caterpillars, the caterpillar of the cherry sphinx moth, several 

 caterpillars of the rosy maple moth, also Holomelina opella, 

 many tan and brown moths, and I found one mutilated rosy 

 maple moth under the nest. 



Some excrement that the young left in the nest were kindly 

 examined for me by Professor Charles P. Alexander of Cor- 

 nell University. Professor Alexander found the remains of 

 several ground beetles, myriads of scales of moths, part of an 

 ant, and part of a spider.^ 



The young of the Olive-backed Thrush are extremely in- 

 telligent and vigorous. I took a young Olive-backed Thrush 

 from the nest, ten days old, at 9 a. m. He was a wild, chirp- 



" Excrements examined by Prof. Charles P. Alexander. 



Six intermediate antennal segments of a beetle, apparently a 

 ground beetle, (Carabiclw). 



Myriads of scales from Lepidopterous wings, wliicb shows that 

 scores of these insects must have been eaten, wings and all. They 

 are probably moths {Heterocra) rather than butterflies (Rhopalo- 

 cera). The part of a membrane of wing of some moth of small to 

 medium size, representing the cubital and anal fields of the wing. 



Mandible and head of medium-sized ground-beetle (Carabidw). 



Elytra and abdomen of a small beetle, apparently a Lathridid. 



Chelicerse of a small spider. 



Head of a large ant, probably Campouotus. 



An abundance of femora, and tibiae of various small insects, 

 mostly being beetles, apparently. 



Five heads of an hymenopterous insect thought (by Dr. A. D. 

 MacGillivray) to be a bee; these heads exceedingly convex and 

 very coarsly punctured. 



Caudal end of a pupa of some insect, with four caudal hooks, 

 and a broken ring of subcaudal hooks. 



The most conspicuous single element of the excrement is the 

 myriad of lepidopterous scales, which to .judge from the great 

 diversity in size, shape, and texture, must have represented a very 

 •considerable range of species. 



