6 DRAGON FLIES VS. MOSQUITOES. 



introdm-ed in oiu- public lakes — The dissemination of para- 

 sitic fungus— Cultivation of fresh water algfe— Dr. Hagen 

 calls attention to the use of beer yeast for destroying green- 

 house pests and potato beetles — Field for practice . . 117-120 



Artificial Re.medies. — The use of coal oil in swamps — The use 

 of poisons to be avoided — Lanterns — Expense and trouble 

 inconsiderable — General and scientific drainage — Coijpera- 

 tion and persistence needed factors— ^ledieines and deter- 

 rents for individual protection — Quassia -wood solution . 120-122 



Concluding Recommendations. — A closer study of the life- 

 history of the dragon fly — Employment of lamps — Raising 

 of fish— The use of coal oil — Astringents — Drainage — Appro- 

 priation of a fund to aid experiments 122-123 



The Destruction of the House Fly. — Habits— Habitat — 

 Speedy removal of stable debris — Fly fungus .... 12:5-12-1 



Mode of Oviposition of certain Species op Odox.vta . . 125-127 



DRAGON FLIES AS MOSQUITO HAWKS ON THE 

 WESTERN PLAINS. 

 A Letter from Capt. C. N. B. Macauley. 

 The sufferings of horees and mules— Smudges— Devil's darn- 

 ing needles— Disappearance of mosquitoes due to the prev- 

 alence of dragon flies — Existence bearable again— No further 

 use for head nets, mosquito bars, or smudges — Mosquitoes 

 termed the Sioux's ajlies 131-134 



CAN THE MOSQUITO BE EXTERMINATED? 

 By Henry C. McCook, D. D. 

 Antiquity <.if the mosquito—Success in limiting the number 

 of mosquitoes pivots upon two points : hostile environment 

 and natural enemies — Cosmopolitan distribution — Habitat — 

 Oviposition— Caudal swimming appendages— Fairy like 

 transformations— A vision for poet or artist- Dragon fly 

 incidents— " Snake feeders"— The spider as a check against 

 undue increase of insects— Beauty of cobwebs— Despised 

 Arachne harmless to mankind — AVebs as snares— Two hun- 

 dred and thirty-six insects in one web 137-147 



APPENDIX. 



Bibliography prepared by ]\Irs. C. B. Aaron, accompanying her 

 essay 151 -15y 



Bibliogi-aphical catalogue prei)ared l\v Wm. Beutenmiiller, ac- 

 companying his essay 161-179 



