The Flight of Nocturnal LEPinoPTERA 45 



and Feltia cxclamationis (Dobrovljansky, 3), where long troughs filled 

 with fermenting molasses were exposed in the fields ; and also in India, 

 where large "Andres-Maire" traps proved very successful in controlling 

 Agrofis ypsiloii on limited areas. (Woodhouse and Dutt, 4). 



I. Seasonal Relations of Minnesota Moths 



During the time from June 18 to September 30, 1920, aliout sixty- 

 five of the traps described above were in operation, and some of the 

 results are shown graphically on Plate VI. The moths captured were 

 grouped in three classes : large Noctuidae, including all species of such 

 sul)faniilies as the Acronyctinae, Agrotinae, Cuculiinae, Hadeninae, 

 Poliinae and larger Catocalinae ; small Noctuidae, including the smaller 

 species and the Deltoids ; and Microlepidoptera, including all micros 

 caught, chiefly Tortricidae. Curve IV gives the total catch of all spe- 

 cies, rated in moths per trap. Curves I to III show the catches of 

 the three groups listed above; and the small curves, which are on a 

 scale two and a half times that of the principal curves, give the num- 

 bers of some of the more abundant species of each group. Table I 

 gives the data for these species and all others which were identified, 

 showing the total catch and seasonal range of each species. Several 

 of the species are recorded as being captured previous to June 18, 

 as about fifteen traps were in continuous operation from the first of 

 April. The meteorological data represented on Plate VI will be dis- 

 cussed in the second part of the paper. 



