354 ENTOMOLOGICAL NEWS [Oct.. '13 



From 1 4th February until i5th March adults of X. colonus 

 and N. erythrocephalus appeared at irregular intervals until, 

 at the latter date, I5th March, the total number of beetles 

 emerged was twenty-nine. Of these, seventeen were Neocly- 

 tus erythrocephalus, ten Xylotrechus colonus and two Mag- 

 dalis armicollis. 



The experiment, as carried out, shows, it seems to me, sev- 

 eral points of interest : 



1. The remarkably great number of beetles (twenty-nine) 

 secured from such a small stick makes evident the extraordin- 

 ary severity of the infestation. 



2. The emergence of the beetles lasted over a considerable 

 period of time, due in part, probably, to the fluctuation of tem- 

 perature in the room. 



3. Neoclytus erythrocephalus Fab. will breed under these 

 somewhat artificial conditions. 



P. S. March 24. I may add that, since sending in my 

 manuscript, two more Xylotrechus colonus Fab. have emerged, 

 thus raising the total number to thirty-one and the number of 



this species to twelve. 



i 



Observations on the Lepidoptera of St. Louis and 

 Vicinity during 19 12. 



By the Members of the St. Louis Entom. Club. 

 Compiled by P. A. SCHROERS. 



The collecting season started very auspiciously during the 

 latter part of March, but did not keep its promises very long. 

 From May I5th to June I5th the weather was cold and cloudy 

 with chilly wintry nights ; July had only a scattering of hot 

 days, and the temperature during the first half of August and 

 the whole of September was also below normal. Under these 

 circumstances collecting seemed so little promising that very 

 few members of the club carried on a systematic campaign. 



The Rhopalocera were particularly observed by Mr. A. 

 Knetzger, who noticed the following departures from the aver- 

 age occurrences ; the following species appeared in far reduced 



