ANNALS 
OF 
The Entomological Society of America 
Volume XIV DECEMBER, 192.1 Number 4 
RESPONSES OF THE LARGE WATER-STRIDER, GERRIS 
REMIGIS SAY, TO CONTACT AND LIGHT 
C. F. Curtis RILEy, 
Department of Zoology, University of Manitoba, 
Winnipeg, Manitoba, Canada. 
With Twelve Figures in the Text. 
CONTENTS. 
PAGE 
if, _‘ThavbrrayS keeretvort leave ose ween Nee es Cakes SFOS cons cr ene ep Oncete caer cantare orca er oe Eee 232 
Meee espenses LO) CONtaGCia t 60K 8 ces woes te ie mt ee ae elena os 233 
SPR NeSMONSCSeie Heer foan 8 eyiee coe a tye tem at tighter wo ese Ses 233 
2. Variation of Responses under Similar Conditions................. 288 
SemOAGGe lines Ol GLOMUS \ meets ger. vk coe Spies ayaye ee Deceit oo 239 
AMD (SAGsOClAGLOM OMG LOUDS mre tacit sehr iaeite es cise em Dae. ce 3h 244 
Be s@ontact inesponses and’ Hibernationy.< 2.02.2 Fosse et oo. oreo 247 
Ge Contactinesponses ands Drought.: C2 its. aane se ect se ee ae 253 
7. Contact Responses and Laboratory Observations................ 255 
S$" Contact Responses‘and the Death-Peint::....).26 2.01.9. ewes 259 
GaGontact mesponses and: Raia Storms? 206) sup yen he ee 265 
Mee iMespOnSes GRAS ber ce nes ony aa tie i roe in oh Suny eos Se inges Osis = 267 
{ise habitat Responses to sunlight. 225 24) 6.0 28).5 6 Lakes Sin Sens Si 267 
2. Responses to Sunlight and Laboratory Observations............. 268 
3. Responses to Artificial Light of Moderate Intensity.............. 269 
4. Responses to Artificial Light of Weaker Intensity................ 271 
5. Responses to Oscillating Artificial Light of Moderate Intensity... 272 
6. Responses to Oscillating Artificial Light of Weaker Intensity..... 274 
7. Responses to Moving but Non-oscillating Artificial Light of 
Moderatewimnbensitiymmrracitee tects leer se ilo eis hem sla dove ae «ico 3 275 
8. Responses to Moving but Non-oscillating Artificial Light of 
‘Vitra eh pel au tterg sy th 22 IMac belt age ont ee AC Ne ne Re 277 
9. Records of Other Observers on the Phototaxis of Gerridae and 
Rela heduNciuicahic MCtCLOPtehay. ste i. spel ae se te oe be ee ne ns PAM 
Lo joe Siildana mez qyeavat AG SiO EES Col uly Oe sinaibee st Bist ca Sn acc se eee 281 
Tl, ‘lhatemorshnousvovnt gaa 86 bens o.c-c pea bic ost Gan OG ae Ota ree rc eee 281 
5) IDMSCVSH Odean solo o obo Sou op awns.S Cod ene phe eto eet eee 281 
S (Corvelivisnosn.8 cob Mes. 6 doro.8 wow Gente hou Sip oud tee ate cee 287 
“7 0 Relsnaslashernsiaeyega ge: oo8o ab ES 2 So OO BeIne One ee 287 
7. ISHDUTG EEE TOLEC 5 nema o dite o> ogo cla dias oo ae oC ie 288 
231 
