i+ 
THE RAVAGES, LIFE HISTORY, WEIGHTS OF STAGES, 
VI. 
Vil. 
VIII. 
IX. 
NATURAL ENEMIES AND METHODS OF CON- 
TROL OF THE MELON FLY (DACUS 
CUCURBITAE COQ.). 
Henry H. P. SEVERIN, Ph. D. Harry C. SEVERIN, M. A. 
WILLIAM J. HARTUNG, B. S. 
CONTENTS. 
PAGE 
MELO ETOTA na eN ee PP EON tec ears, eet er Soe niche wa < tds, seNeceporetacaue a hots 178 
INGE ep elLOTiene, Sern at rene clei one Chen e aeioeure cise). Ate ale 179 
Desempiiom OlmVirtanty cer yes eae onesie ak eb nea tae Cella 179 
icidtObsenvationssmramo ump lcm ateh.t sacs sere ee © ie buen = 180 
1, Oviposiiomin stems of pumpkin vines... 0.0 [2.0.0.6 ees 181 
eo SOmipOstitenen: Petre siOl |GAVESs «os si o's ioe es oes 181 
3) Oviposiion in pumpicia GOWELS. «0.6.5 e ss Se sl een Sea ws 181 
Bm Gas Tae AT. PIUMIAIRSIAS. | Gea 5IS Sunless cares kis slew e oaae Tate 182 
Pi Smeeliny ty asuOuS Cl wacen tee meaner ick errs uals «racic tga cts eis auye 182 
(CRO MLERS EEE ae ROR aes oy Ge ecient a a ae 183 
Renin WO MOW CLG ses eter tn cae oe wh OG ie eM aim andare tess Sa ee 183 
Ba, LAjiry, CO pumpkins 10 he eee nie yee te ane bea 184 
Seemirigiaiiys GO" SUEUR, DEANS. Meet ts wea ae weston ete aie eos Nee Xe 185 
OO lsat compere wate ae Nes oe oats orscr ie) sry oye wane tanetoe aperalerel as 185 
10. Number of melon flies bred from the) food! plants; 4... 46 = 185 
ehew shore agelt toe ee at ne roe ete Sea ets ade Seles ee nie den Nes 186. 
11. Methods of inducing oviposition.......................455 187 
i2iebaciiletonistleshon CHESOVApPOSLCOD: >. cnc gin ot ek cn ee eate ole = 188 
fh Prdpeesian OViposttionrrs ot anne s sued reste ctuts een mee 188 
14. Number of eggs deposited in a receptacle.................. 189 
[ }eMINTMbDeTIOlmipe CkOSHmOVATICS a. cscka enti dae ess tite ses 189 
16. Duration of the egg, larval and pupal periods.............. 189 
17. The effect of temperature on the egg period............... 189 
18. The effect of decay of food on the rate of development of the 
IBIRGE2 ccs > GR nolo eno ee, HO IC ee Se Re oeo 189 
(95s theetteet of drying foodson) the larve....2 0.5... -.2-5- 2 190: 
20.” Respiration.or larves ar liquified pulp... 6.2.56... ae. ne: 191 
SSURY SS] ei eee) ory ase) ot Gag: a ro ean 191 
Ben SR eceuiie Hctoles Of the MELON TMESY sh) 0 Os oc. wis tatae wheres 191 
Zit DommelonuiiesiiamiteSt Caters sere keel a soeiee eo Mele brows w 6 si 192 
24. Number of days required before the adults begin to oviposit 192 
Dee OUMinaryaOn Siagesror tie lite biShOry.. 32. -n oe tle ae ee 192 
265 Number of cenerations annually: 2.2 soc)... vets settee oe 193 
Weights of the Eggs, Larve, Puparia and Adult Melon Flies....... 193. 
INI artsta ped Syd CLC Stes MRED Perey eet oye ate ee airs trae ia cel BY aleea ens «Zeke Soucte ass ds 197 
US ERLE" SOS" GEE 0s doy Sime a a ne Sn 198 
27. Experiments in destroying infested vegetables............. 198 
OR ee SCRE ETITIIOY © TEL hata eer epeaie. ees oe Pec n'a Mai sac als, cisetetan eek otal) heeraae 200 
ee i ga MSETN eye ads cn ea oP cch ta ii e,c5, ON da aseae aie wou elelaisinjals bis es 201 
SM eto Re Wet gency one ain ieee ote ips b nen eels Powe ve 201 
31. The use of vegetable, animal and petroleum oils to trap the 
Balelkaal TANS AC 56 Be ae FOR OE I aC aE BR era 201 
DMM Cam UNS yaegere aie mesic cl ues ioees Oe ai he oe cud tan oO sels eisuabanet 202 
Som ee GISONned dhalESpLray... 6 a--.csra ss: © cette tle eA i eae ee ge 202 
PE Aran ete, chee Oe temas ene Pho cont alas ee eG a Maas Shs hye oe, Owes wie wena 207 
177 
