108 MASS. (Middlesex Co.) 1875. Apr. 30 April 30 - 1875 Clear and very windy with slight snow in P.M. Took the 8.10 A.M. train for Concord and met Al Garland on the car. He was going to try the orioles at Bedford, Arriving at 6, started off 6 from the town and spent the whole day in the wood taking the 6.36 train home at Lincoln. Devoted most of the time to hunting for thrushes nests but did not succeed in finding any though once Lincoln I discovered a pair of the birds (B. boréal's) and shall try for their nest next week. Shot a Pheg. (calandula 1, D. palmarum) 6 (20) D. jura 1, D. coronata 28; Shot then latter from a flock of rural hundred which were collected in the woods along the shore of Walden p. The attraction how I soon discovered in immense swarms of D diptera insects, a species of Diptera which occurs near ponds in myriads at this season. Only a few D. coronata flew with the sed polls, but near the centre of the pond itself was a single Hirundo horresum Skimming about close to the surface of the water. Found signs of Sees also in nearly every old orchard that I visited but was unable to discover a nest though some of the droppings etc were quite fresh; in many who I found feathers etc. of small birds principally robins Found two crows nests from which I started the birds, but did not take the trouble to examine them. Attended a