Feb. 2, 1920 Lepidoptera at Light Traps 48 1 



period, 424 males, or 19 per cent of the total of males, were killed. From 

 10 p. m. to 4 a. m. the percentage of gravid females declined while that of 

 males and spent females increased. These figures agree with the deduc- 

 tions made by Mr. Geo. G. Ainslie in the excellent paper, "Crambid 

 Moths and Light, "^ in that a larger percentage of the total number of 

 gravid females and a smaller percentage of the total number of males 

 were captured during the early hours of the night. 



That the percentages given here do not approximate more closely those 

 for the material collected at Nashville, Tenn., during the summer of 191 5 

 can be readily understood when it is remembered that Mr. Ainslie's col- 

 lections were made up practically of one species, Crambus teterrellus 

 Zicken, which, as he writes, "is a species without distinct generations and 

 the moths are quite uniformly abundant" during the seasonal period of 

 the adults. The collections made at Hagerstown in the summer of 191 8 

 embraced some sixty-odd species, representing 10 families. Of these 

 60 species, at least 20 are of economic importance ; and several others are 

 likely to prove serious pests if circumstances favor them. 



* AiNSUE, Geo. G. CRAMBID MOTHS AND UGHT. /n Jour. Econ. Ent., V. lo, no. 1, p. 114-123, 3 fig. 1917. 



