42 



Compound, 2 pints ; water 38 pints. Besult about the same as in 

 preceding experiment. 



These four experiments were repeated and the water added (3 gal- 

 lons) 2 hours after instead of before application of emulsion. The re- 

 sults in this case were much more satisfactory, destroying most of the 

 eggs in the two first experiments and nearly all of the phylloxera in the 

 two last to a depth of about 10 inches. 



GENERAL NOTES. 



It was probably owing to the unusually heavy rainfall during last 

 winter that insects were comparatively scarce in the early part of the 

 season. At least no complaint was noticed or heard during this time. 

 While a large number would undoubtedly be destroyed by weeks of 

 excessive rains and floods, yet there are such as are not or only slightly 

 affected by this element. I may cite here, for instance, such species the 

 eggs of which are found upon trees and shrubs during the winter months 

 as well as the eggs of locusts usually deposited on dry hillsides. On a 

 visit to Sonoma county during May, the larvae of Clisiocampa were ex- 

 tremely abundant. Two species were found, namely, G. constricta and 

 C. thoracica. The first species predominated in numbers, and while 

 usually feeding upon deciduous oaks was also found upon Live Oak and 

 Quercus agrifolia as well as various shrubs. In confinement these larvre 

 were furnished with food consisting of leaves of Plum and Cherry, but 

 for three days they would not feed upon these and readily attacked the 

 leaves of Live Oak which were given them, and upon these they were 

 raised. C. thoracica, which is the species defoliating various fruit trees, 

 was found chiefly upon willows, but also upon oaks, and here again 

 usually upon White Oak, upon which its eggs were found in October. 

 This species was bred upon leaves of Prune and Cherry. 



At the end of May of the present year, I received from Mr. J?. L. 

 Washburn, entomologist of the experiment station at Corvallis, Ore- 

 gon, a few Clisiocampa larvae new to me. He said they were found 

 feeding upon a species of Crataegus and were sent with leaves of apple, 

 upon which I reared them. On my visit to Washington these larvae 

 were met with at Tacoma, on June 8, within webs upon Alder (Alnus 

 rubra), and again at Easton, during July, upon Willow. Near Tacoma 

 I also found what I took to be the larva3 of C. thoracica very abundant 

 upon Cratwgus, Alder, Hazel, and various other shrubs. Two of the 

 larvae were taken to Easton, and one pupated and to my surprise pro- 

 duced not the expected C. thoracica, but C. erosa Stretch. 



About 10 miles along the railroad in southern Oregon, about the be- 

 ginning of June, larvae and webs of one of these moths were seen in 

 large quantities on dry hillsides upon Purshia tridentata DC, Ceanothus 

 sp., and also Wild Cherry. While crossing the Columbia River on 

 steamer, June 8, at which time the water was very high, large numbers 

 of these larvae were observed floating upon the swift current and as 



