TABLE OF CONTENTS. 
PAGE 
ATEN CA VIL OY GGT DIN TS 6 2A TE ee IP i eu eg en a amen 3 
LG TRTBNRUCERID) © ES | irae CRA ay a Ma eee ae ere iF U 
SPT OETCG ING 2. Bee TESS GENIN ante One ee ag eee A Pe 8 
SURVEY OF FAMILIES INCLUDING A SYNOPTIC KEY TO AQUATIC AND 
SHMIAQWATIC HME MIPTHRA. (Mey pr LI) 7.6.) e. ida wae cule dae. 9 
HISTORICAL SKETCH OF THE BIOLOGY OF AQUATIC AND SEMIAQUATIC 
ESI IVSITIERTUES AUP tere attains Ne OE nye ean d) se) SMA uch Sa 7t CN SIN a ahh 13 
ECOLOGIC AND ECONOMIC RELATIONS, INCLUDING A HABITAT KEY TO 
THE AQUATIC AND SEMIAQUATIC HETEROPTERA. (Key p. 29), ..... 17 
SLIP AND RIO INC TNO Net gettnie se terete Av Ue ae mee Ja Mel de ig tore POS 
SEMIAQUATICS: 
Gelastocoridx— 
axqnomyoltshamilyrs stot ee vee ieee a ee peek neato 
Biology oleHamiliy) ss er ee. fie URN Ebadi pare ta, Sei ete yo ey Ne) 
- Ochteride— 
Taxonomy of Family........... fas Sig eA We area ee oS, 51 
ISTO IEA ONE LOE a RGA ie Raa oo One ee SE 53 
Saldide— 
Bbaon OnmyaO le anmlbyns sits ere Ge 1. ec CAG wa hacns Saye oui we! 
BiGloo va learn lye rey ets dats e et te Tuc iy ante le er tegen | 79 
Hebride— 
ICO MOMY AOL sh AIT Vaspretcesee Steric). Be ck a AAPA eta tapers hei eave es ohana 82 
TOO oS zOle Le aM yew nite nee kt ops Lal Me eed Seay) oe OAL itrots: 
Hydrometridx— 
AXOMOTNy ON Maria ys wee he ue A Sys. ciel hy Sere eee ki or mae aula 2 91 
rOlORUMONMMannillivieere na meee ats at ss ge Mec el tin up UR Ronee 92 
Mesoveliide— 
PRAKON OMA Olea Tal yee NM aaines \ Sovtee wn ce ee! Va 99 
Broloavaofs amily ie nace s eee Sete Merges 1 ae aveta tae ee 101 
Gerridx— 
PIUROM OMA ROME ANIM YA wags MeN lcmmmiMe HOU AI NE ig asl) 106 
Biology of Family......: SIT MPMI RICE AY GRUNT py ity MGS) 2 LAGE 116 
Veliide— 
Beco OTaveoieeamatly: hee si i de Mee Ma Tye ea ae) TN i ie 121 
IGLOS RO BOHLIN L Yue sued ysl Aer Ama NT nN mPa ae a Smee elksy:! 
AQUATICS: 
| Belostomatidez— 
4 erKOnemMiynOtrannily cee | 20 eee Gi aes OE ci Ne era 141 
5 PR UmrePaMRRCOLI ARIA ye a ey, 15k ew aaccao sigh «teh nua a eon ee a> 142 
(5) 
