68 PAPERS ON ZOOLOGY OF MICHIGAN. 



placed end to end on the damp sand Many species of water beetles 

 Avere taken in the rock pools. 



The southwest beach was. on the other hand, a very poor place for 

 finding Coleoptera, even when the wind and waves were from the 

 southwest. The strip of sand running parallel with the beach was far 

 wider in extent on this shore, but was loose and dry and supported 

 scattered shrubs and plants of various species; the sand being so loose 

 and dry as to make it almost an impossibility for predaceous beetles 

 to move on the surface. The trees, shrubs and flowering plants near 

 the shore proved to be the best habitat for beetles. Many species 

 were found here that did not appear on the northeast shore. 



The other shores with a wide sand}^ beach proved to be very poor 

 beetle habitats ; little or nothing being found on them except one species 

 of Cicindela. The interior of the island was also a poor beetle habitat. 

 Some species of Cerambycids, however, were to be seen on the blossoms 

 of New Jersey tea which grows along or near the path running across 

 the island. 



Contrary to expectation, the light from the lighthouse did not seem 

 to attract the beetles It did, however, attract June flies, Ephemeridae, 

 in vast numbers, for Captain McDonald informed the writer that on 

 one morning he filled over six bushel baskets with the flies collected on 

 the lighthouse platform. A number of species were found at night on 

 the window screens and walls of the lighthouse, attracted by the lamp 

 and white walls on the outside of the building, and many beetles were 

 flying about the open space of land occupied b}^ the lighthouse, some of 

 which were taken with the net. 



The number of species taken in each habitat is as follows : 



355 only on or near the northeast shore. 



116 only on or near the southwest shore. 



32 found on or near both northeast and southwest shores. 



4 in the interior of the island. 



78 near the pig-pen, at or near the lighthouse, on flowering shrubs 

 near the path to the lighthouse, at sugar lures on trees and in a lantern 

 trap in the clearing. 



