DIPTERA 



45 



FIG. 22. Wing of a mosquito. Photographed through the microscope to show the 

 scales. 



crane flies are easily recognized by their long brittle legs 

 and long neck. The larvae 

 of many species do some 

 damage among the roots of 



House Fly (Musca 

 Domestica) 



This nuisance is found in 

 most parts of the entire world. 

 Recently it has been shown 

 that its natural breeding place 

 is in the manure thrown out 



FIG. 23. Crane fly. Photograph, nat- of horse S tables. The hun- 

 ural size. , , , . , , 



dred or more eggs deposited at 



intervals by a female, hatch in from six to twelve hours 

 into white pointed larvae called maggots. These molt 



