INSECTS IN RELATION TO OTHER ANIMALS 



247 



ie showy Calosoma scrutator, and the first two birds are especially fond 

 )f Harpalus caliginosus and H. pennsyhanicus, and feed Galerita to their 

 young. "A score of smaller Carabidae (ground beetles) and Chryso- 

 melidae (leaf beetles) metallic and conspicuously colored, are habitually 

 eaten by birds that have an abundance of other insect food to pick from." 



The stenches of Lampyridae (firefly family) appear to be more effec- 

 tive than those of Carabidae. Telephorus is occasionally eaten, but Pho- 

 tinus rarely if at all. Chauliognathus is not eaten by many birds 

 (though flycatchers and swallows select this insect) and the genus is 

 regarded unfavorably by caged catbirds and blue- jays. 



In regard to other insects, Judd finds that Epicauta (blister beetle) 

 with its irritant fluid, is immune from all but the kingbird; Cyllene 

 seldom occurs in the stomachs of birds; May flies and caddis flies, 

 however, are terribly persecuted, but swiftly flying Diptera and Odonata 

 are highly immune. 



From such facts as these, Judd properly infers, "not cases of protec- 

 tion and noriv-protection, but cases of greater and lesser efficiency of 

 protective devices." 





