LIGHT TRAP EXPERIMENTS IN CONNECTION WITH TEMPERATURE. 275 





T>a*A 



Temperature, 



No. of 





8 a.m. 



moths. 



May 21st 



61° 



10 





, 22nd 



71° 



17 





, 23rd 



71° 



15 





, 24th 



71° 



16 





, 25th 



66° 



21 





, 27th 



61° 



20 





, 28th 



58° 



16 





, 29th 



62° 



17 





, 30th 



64° 



52 





, 31st 



68° 



58 



Remarks. 



Dark 9 p.m. to 3 a.m. 



12 a.m. to 3 a.m. 



It will be noted this month that on the 8th there was a consider- 

 able rise in temperature ; the captures, however, did not increase- 

 to any extent with it, in fact they were less than at the end of April 

 — possibly the darkness then accounting for it. On the 22nd there 

 was again a considerable increase in temperature with a small 

 increase in captures. . On the 30th there was a jump in the number 

 of captures, without any great increase in temperature, but a 

 lengthening in the hours of darkness. In this month the dark- 

 ness appears to have had more effect than the temperature. 



Date. 



Temperature, 



No. of 



Remarks. 







8 a.m. 



moths. 





June 1st 



66° 



73 



Dark 12 a.m. to 3 a.m. 



„ 2nd 



69° 



57 



)» )> i> 



„ 3rd 



62° 



127 



)! )! )) 



„ 4th 



55° 



84 



Light all night. 



„ 5th 



58° 



67 



u j» 



„ 6th 



61° 



54 



i) ii 



„ 7th 



64° 



50 



■I i) 



„ 9th 



58° 



69 



,, ,, 



„ 10th 



59° 



139 



)> >) 



„ 11th 



60° 



258 



,, „ 



„ 12th 



60° 



112 



,, ,, 



„ 13th 



62° 



145 



Dark 9 p.m. to 12 a.m. 



„ 14th 



50° 



125 



,, ,, ,, 



„ 17th 



56° 



630 



,, ,, ,, 



„ 18th 



56° 



149 



,, ,, ,, 



„ 19th 



64° 



397 



ii n n 



„ 20th 



58° 



286 



,, 9 p.m. to 3 a.m. 



„ 21st 



62° 



247 



,, ,, 



, 



„ 22nd 



59° 



133 



i> >> 



, 



„ 23rd 



59° 



162 



>> >> 



, 



„ 24th 



59° 



190 



,, ,, 



, 



„ 25th 



55° 



. 129 



>i n 



, 



„ 26th 



55° 



81 



,, ,, 



, 



„ 27th 



58° 



. 168 



ii n 



, 



„ 28th 



59° 



. 155 



ii n 



, 



„ 29th 



54° 



. 164 



,, 12 a.m. to 3 a.m. 



,, 30th 



55° 



43 



I, 11 



I 



