814 The American Naturalist. [September, 
spring arrivals: May 9, 1887; May 10, 1888; May 4, 1891. Bulk 
arrived: May 13, 1887; May 12, 1888). 
97. V. gilvus (Vieill.), Warbling Vireo. Common summer resident. 
98. V. solitarius (Wils.), Blue-headed Vireo. Tolerably common 
migrant in the spring and fall. (Dates of spring occurrences: April 
28, 1888; April 20, 1889; May 10, 1890; April 22, 1891. Fall oc- 
currence: Sept. 23,1890). 
99. V. noveboracensis (Gmel.), White-eyed Vireo. Rather infre- 
quent summer resident. 
100. Mniotilta varia (Linn.), Black-and-White Warbler. Abund- 
ant migrant in the spring and fall. I have never found it in the sum- 
mer, though several nests have been taken in this county. (Spring 
occurrences: May 7, 1887; May 3-17, 1890; April 25, 1891; May 2, 
1897. Fall occurrences: Aug. 24 to Sept. 9, 1887; Aug. 21-28, 1888; 
Sept 28, 1889; Sept. 6 to Nov. 29, 1890). 
101. Helmitherus vermivorus (Gmel.), Worm-eating Warbler. In- 
frequent summer resident; it isno more abundant during the migra- 
tions. (Arrives about the second week in May). 
102. Helminthophila pinus (Linn.), Blue-winged Warbler. I have 
seen this species only once, when I secured a specimen in West Goshen, 
May 17,1890. It must be considered rare in this immediate neighbor- 
hood. Subsequently (May 9, 1897) I saw another. 
103. H. chrysoptera (Linn.), Golden-winged Warbler. One male, 
May 5, 1897). 
104. H. ruficapilla (Wils.), Nashville Warbler. A not infrequent 
migrant in May and September. 
105. Composthlypis americana (Dinn.), Parula Warbler. Abundant 
migrant. (Spring occurrences: May 6-10, 1888, May 3, 1890; May 4, 
1891. Fall occurrences : Sept. 18-20, 1889; Sept. 23, 1890). 
(To be continued.) 
ENTOMOLOGY: 
Protective Value of Motion.—Mr. F. M. Webster in an address 
delivered before the Ohio Academy of Science and afterwards published 
in the Journal of the New York Entomological Society? makes some 
interesting remarks on the protective value of action, volitional or other- 
! Edited by Clarence M. Weed, New Hampshire College, Durham, N. H. 
? Journal of New York Ent. Soc., V. 67-77. 
