140 BUTTERFLIES 



search years without finding it, and then come across a 

 dozen in a single day. I well remember the interest with 

 which I first found this species on the margin of a great 

 swamp in Michigan when I was eager for every new butter- 

 fly to add to my collection. I had never seen it alive be- 

 fore and the thrill with which the first specimen was cap- 

 tured can be realized only by those remembering similar 

 experiences. 



Harris's Checker-spot 



Cinclidia harrisii 



This little butterfly so closely resembles the Pearl 

 Crescent and the Silver Crescent that on the wing it is 

 easily mistaken for them. It really looks more like them 

 than it does the Baltimore Checker-spot, which is con- 

 siderably larger and darker colored than the present 

 species. This is essentially a northern form occurring 

 only in a narrow strip of country east of Minnesota and 

 Wisconsin, running on the north through southern Canada 

 and on the south through Michigan, New York, and Massa- 

 chusetts. 



This insect is one of the best-known botanists among all 

 the butterflies. In the very difficult group of asters which 

 has caused endless confusion to human botanists these in- 

 sects seem always able to select the one species — Aster 

 umhellatus. It has been repeatedly found that the cater- 

 pillars would starve rather than eat the leaves of other 

 kinds of asters, and so far as known they have never been 

 found feeding outdoors upon any other. 



These butterflies appear along roadsides and in open 



