388 F. H. KRECKER. 



Some observations were also made on the relative influence of 

 white and colored lights. On the sides of one of the buildings 

 in the resort there was a succession of alternating white, red and 

 blue lights. The slightly yellowish white bulb attracted the 

 insects in greatest numbers. There was the usual excitement 

 zone and the regular alignment of those at rest. The number of 

 insects about the red and the blue bulbs was decidedly small and 

 as between the two lights about the same. These lights appeared 

 to have a quieting effect on the insects. The alignment was 

 similar to that described for white lights but there was no well- 

 defined excitement zone, in fact the insects crawled about the 

 bulbs without exhibiting markedly abnormal reactions. 



OHIO STATE UNIVERSITY, 

 COLUMBUS, OHIO. 



