26 



OTHER COMMON INSECTS 



of this species that appear in alternate years, the number 

 does not seem to vary from year to year. The birds do 

 much towards destroying them. The kingbird, sparrow 



hawk, butcher bird, and 

 great-crested flycatcher 

 are their most common 

 enemies. 



17. Coleoptera. — The 

 Coleoptera (co-le-op'- 

 ter-a : Greek coleos, 

 shield ; pteron, wing) 

 are the beetles. The 

 first pair of wings is 

 horny and meets in a 

 The second pair of wings 

 The mouth parts are for 



Figure 20. — May Beetle. 



Note difference in first and second 

 pairs of wings. 



straight line down the back, 

 consists of thin membranes, 

 biting. Among the harmful beetles are many wood 

 borers, the May beetles, 

 potato beetles, asparagus 

 beetles, and weevils. 

 Some of the beneficial 

 beetles are the ladybug, 

 which feeds on destruc- 

 tive and harmful insects, 

 and the carrion beetle, 

 that feeds on dead 

 animals. 



The ladybugs are 

 decidedly beneficial. 

 Their larvae run over 

 leaves and feed on other 

 insects. Even as adults they continue this good work. 

 Hop growers appreciate the value of the ladybug larvae on 

 their vines, as the ladybugs destroy the harmful hop lice. 



Figure 21. — Eggs of Ladybug. 



