94 THE LEPI'DOPTERIST 



many caterpillars upon willows and special big ones 

 upon a willow with large, dark green leaves. There 

 were about 80 larvae and I fed all with the small 

 leaves of willows I was using for larvae of polyphe- 

 mus and of Sphingidae. From this number 21 asty- 

 anax emerged. It therefore cannot be doubtful any 

 more that astyanax feeds upon willows and cotton- 

 wood as well as upon cherries. 



Entomological Conditions in and 

 Around Chicago 



By Dr. Robert Unzicker, Chioago, III. 



The old entomologists here say that twenty years 

 ago the opportunity to catch many specimens of good 

 species was very much better than at present, but still 

 Chicago has yet a long record of species of Lepidop- 

 tera; however, it is necessary to know the places in 

 which one can find them. It is a tough job to hunt 

 all over the surroundings of a big city to find a place 

 that looks opportune for collecting, but such places are 

 still there and I found more than one good hunting- 

 ground. For instance, there is a big lot right beyond 

 one side of the city limits where we can find a large 

 number of larvae of Bombycidae and Sphingidae up- 

 on the numerous willows and grapes. There is an- 

 other place not far from Chicago, only one hour's 

 walk, where we can find a real gathering of larvae of 

 all kinds of butterflies and moths. In one of the big- 

 gest cemeteries are hundreds of Saponaria flowers and 

 when we go hunting there in the summer evenings we 

 always come home with a good catch of moths. The 

 parks again are specially good for spring collecting. 



I have so far this year collected and bred 

 over 2500 caterpillars and I am not through 

 with collecting yet. They were all found in the city 

 and just beyond its boundaries. The following gen- 

 eral list shows what larvae I have already found this 

 year: 



