The mother wren thu.9 made 110 visits to her little ones in four 

 hours and thirty-seven minutes, and fed them 111 insects and spidei's. 

 Among these were identified 1 white grub, 1 soldier bug, 3 millers 

 (Noctuidse), 9 spiders, 9 grasshoppers, 15 May-flies, and 34 caterpil- 

 lars. On the following daj' similar observations were made from 9.35 

 a. m. till 12.40 p. m., and in the three hours and five minutes the young 

 were fed 67 times. Spiders were identified in 4 instances, grasshop- 

 pers in 5, May-flies in 17, and caterpillars in 20. 



Previous to the observation of this brood of wrens a collection of 

 adult and nestling wrens was made. Their food is shown in diagrams 

 (PI. IX, fig. 1). 



Barn Swallow. — The food of seven nestling barn swallows (tig. 16) 

 collected June 17, 1899, consisted of beetles ( OntJiophxujuH pennsyl- 

 vanicus, Ajpliodius inquinatus, Agrilus sp., and Rhynchophora), para- 

 sitic wasjis {Chalcis sp. , Ichneumonidse and Tiphia iiwrnata) and flies 

 (Leptidse, Chrysojps sp.,- Lricilia csesar and other Muscidte), bugs 

 (Capsidse), May-flies, and snails. The vertebras of some small fish, 

 which may have been taken to aid the gizzard in digesting the food, 

 were also found in the stomachs. 



Bank Swallow. — An examination was m.ade of the stomachs of 83 

 young bank swallows collected a few miles above Marshall Hall from 



