490 MISS O. C. LODGE ON TDE 



Baits. Jiesultx. 



]'read + cheese + inilk _( Fow Blow-flies, Fannia, and many PiopJiila 

 ii. caught. 



+ . j-,i,.,tr<rnfc ^ ^oue caught till 2nd day, when flies (as above) 



"" (. caught. 



+ + water ( ^^ Blow-flies + 12 Fannia + 1 House-fly came 



" , " , . ''" \ on 1st day. Kept for 15 days and few caught 



„ + „ + „• + maggots. ( each day. 



Milk, fresh Unattractive. 



3) sour Few CaZ^ijo/iora caught. 



Casein + water <^ Fannia + &omc Blow-flies and many PiopJiila 



„ + „ + maggots I caught. 



rOn 4th and loth days many Blow-flies cauglit 

 + + bread J (when no meat baits exposed). On most 



j days a few Blow-flies as well &s Fannia and 



v^ Piophila caught + a few Miisca. 

 4- J- j-,y,on.,v->+^ f Mttsca + Lucilia and C'allipJiora + tew Sar- 



" + >; + ;; + HiaggOtS .V , , -n- , ■, i^ii.ii_ 



) copliaga + many Piophtia caught — both at 

 ^ ^. j the Zoo and when put by manure-heap at 



" " " V, Brentford. 



Summary : — 



It was found that for Blow-flies — 



(1) The most attractive baits were : — 



(a) Liver + maggots. 



(b) Brain + ,, 



(c) Fish +_ „ 



(d) Hard-boiled egg + maggots. 



Of these, liver -|- maggots gave the best results. 



(2) Meaty substances of all kinds were more attractive than 



either chemical or vegetable substances. More flies 

 came to them than ever came to the vegetables or 

 chemicals, even when these two latter were the only 

 available baits for the flies; although certain substances, 

 notably mixtures of casein and peptone with water 

 and bread, showed possibilities of being good baits 

 when they were the only attractions present. They 

 then caught a number of different species (i. e. Musca, 

 Calliphora and Liccilia, /Sarcophaga, Fannia, and 

 Piojyhila). 



(3) The digestive action of blow-fly maggots on meat, etc. 



added to their attractiveness. 



(4) The best way to attract and catch blow-flies was to put 



the baits in sunny places. 



(5) The great drawback, however, to the general employ- 



ment of any of the meaty substances, or of the mixtures 

 of casein, water, and bread, or of peptone, water, and 

 bread, is the most objectionable smell which is given 

 oft" when they have been kept for any length of time ; 

 yet it is only after keeping them thus that their most 

 attractive stage is reached. It would, however, be 

 possible to use them out of doors, in the garden, or 

 elsewhei'B away fi'om the house, where the smell would 

 not matter so much. 



