would recommend that the cash on hand be expended in books for our Library, under the- 

 direction of the new Council. 



The whole respectfnlly submitted. 



Geo. Jno. Bowles. 



Montreal, 1st May, 1877. Piesidenl. 



The following were then elected to office for the ensuintr year : 



G. J. Bowles, President, (re-elected) ; H. H. Lym.in, Vice-President; tr. B. Pearson, 

 jr., Secretary and Treasurer (re-elected); C. W. Pearson Curator (re-elected); Council — 

 F. B. Canlfield, liobert Jack, W. Hibbins, jr. 



After a pleasant conversation on Entomological subjects, and the examination of nume- 

 rous specimens, the meetinjr adjourned. 



G. B. Pearson, Jun., 



Experiments on the Colorado Potato Beetle. 

 Hi/ W. Brodie, Toronto. 



The following interesting paper giving details of experiments on the Potato Beetle was 

 read at a recent meeting of the Toronto Entomological Society : — 



Gentlemen, — 1 herewith submit for your consideration a synopsis of a series of experi- 

 ments, conducted by myself, intended to determine certain facts in the life-history of JJori/- 

 phora 10 lineala, about which there is a good deal of popular misconception. 



The experiments were made in cages, where the natural conditions of temperature, light, 

 and moisture were maintained as nearly as possible ; the same cages in which I had success- 

 fully reared larva; of Pajiilio troliiis and other delicate lepidoptera. 



To secure greater accuracy nearly every experiment was repeated, or two or more con- 

 ducted simultaneously, and the results carefully compared and recorded. 



The more important propositions supported by these experiments are ; 



First. — The potato is the only plant in Ontario on which the beetle can feed so as to 

 become very numero)is. 



Second. — Food is necessary to the imago, in order to develope the reproductive func- 

 tions. 



Third, — If not supplied with food the imago will die in a short time — perhaps never 

 exceeding two weeks. 



Fourth. — The advent in Toronto of Lydella doiyphont, by far the most reliable and 

 valuable of all the enemies of i). 10 linmfa. 



It is so generally conceded that D. 10 /ineafa will not feed on the leaves of any of our 

 forest trees neither on any of our grasses, nor cyperaceous plants ; that proofs of this need 

 not be submitted nor discussed. The plants experimented upon, you will see, are mainly 

 those which have been named as food plants by new.spaper men, farmers and others. 



Experiment 1, — Thirty mature beetles, after being kept without food fir twenty-four 

 hours, were supplied with leaves of carrot, parsnip, beet, pumpkin, lettuce, .sunflower, sage, 

 Panicinn mis fful/i, and cabbage, for eight hours ; none eaten ; when supplied with potato 

 leaves, all ate freely. 



Experiment '2. — Thirty mature beetles, after being kept without food for thirty-two 

 Jours, were supplied for sixteen hours, — in addition to the plants named in experiment 1. — 

 with red root, {Amnrantiis hi/bridns), sheepbur, {CywKjIi'i^fniii cffichiuh). burdock, (Lappa 

 officinalis), small bur, {Eikinospemmra lap/mla), sour dock, (liiimcv crispus), Lobe/la fi/pliifi- 

 tica smA L. ivjlata, lambs quarter, (Chevopiidiiim allmni), mullein, (Veibasciini //iap.<iis) ; 

 none eaten ; when sujiplicd with potato leaves all ate freely. This experiment was also re- 

 peated three times, with uniform result, 



Experiuient 3. — Tli'i 'y mature beetles, after being kept eleven days without food, were, 

 in addition to the plants used in the second exjicriment, supplied with leaves of milk weed 

 (Ascifipius cormiti), arrow head {iHat/yitturia niriabih'.s), Canada thistle (Cirsiiim arnnsr) 



