iScp.] Cherrie on Vireo Jlavoviridis. T. 2Q 



Corvus ossifragus. Fish Crow. — Though not as numerous as Corvus 

 americatius, this Crow is not to be classed as rare. It breeds abundantly 

 in May in the clumps of cedar trees near the beach. On May 16 Mr. 

 Harry G. Parker found a number of sets of eggs in a grove of cedars near 

 the Seven Mile Beach Life-saving Station. Incubation was but slightly 

 advanced. My notes on the Fish Crow in the 'Bay State Oblogist' for 

 March, 1SS9, were wrong, as the Crow I found breeding on Peck's Beach in 

 April was not the Fish Crow, but Corvus americanus. The breeding 

 time of the Fish Crow is from the 5th to the 25th of May. Fresh eggs can 

 be found early in May. 



Molothrus ater. Cowbird. — I have taken a number of sets of Chip- 

 ping Sparrow's nests containing single eggs of this bird, and I have also 

 found their eggs in the nests of Song Sparrows. 



( To be continued.) 



NOTES ON HABITS AND NESTING OF VIREO 

 FLA VO VIRIDIS (CASS. ) . 



BY GEORGE K. CHERRIE. 



At San Jose, Costa Rica, the Yellow-green Virec ( Vireo 

 Jlavoviridis) is not a permanent resident, disappearing at the 

 beginning of the dry season together with the Red-eyed Vireo 

 ( Vireo ollvaccus) , which latter bird is seen only for a very short time 

 and is very rare as it passes on its journey south. The last re- 

 cord I have of V. Jlavoviridis for 1SS9 is that of the night of 

 September 28, when, in company with seven other species of 

 North American birds — none of which are found within the 

 limits of Costa Rica during the breeding season, — they rushed, in 

 terrified groups, to death, bewildered by the electric lights. The 

 bodies of those picked up the following morning, and for some 

 three weeks previous, were noted as being extremely fat, a thing 

 that had not in any way attracted my attention previous to the 

 migration. 



By April 10 they are quite common, and on April 24, 1SS9, I 

 saw one carrying nesting material. At this season they are almost 

 always seen in pairs, and apparently have a pent up supply of 

 song that is liable to burst forth at almost any moment, wherein 

 they differ from their near relatives, V. ollvaccus, which at this 



