handled the same as the burclover. Red clover just fills the 

 bill. This clover cut when the alfalfa begins to come well into 

 bloom will then serve as a second check and thus reduce in- 

 festation of alfalfa to the minimum. 



Not only is this course of thus using a trappatch of clover 

 necessary if alfalfa is to be well protected against the chalcis- 

 fly, but it also necessary if a clover seed crop is to be protected 

 against the clover midge, since such cutting of the trappatch 

 destroys the spring brood of the clover midge and leaves the 

 next cutting free of infestation, offering a splendid opportunity 

 for a heavy seed crop. 



Naturally cases where a crop can be protected by growing 

 a trappatch of the same or a similar plant are comparatively 

 rare. Take the case of the smoky cranefly, described in U. S. 

 D. A. Ent. Bull. No. 85, part vii. There is a whole family of 

 craneflies, comprising several genera and many species, each 

 present as adults for a certain period of the year, varying in 

 time of emergence from March to October. There are 

 aquatic, semiaquatic and terrestrial species. 



As to records of damage, you find among others : 

 ". . . Dr. S. A. Forbes (1888) reports a very gen- 

 eral and serious outbreak of tipulids (Tipula bicornis) 

 in grass and clover meadows throughout southern and central 

 Illinois, many pastures ind hayfields being almost completely 

 ruined ..." also " . . . Mr. R. W. Doane . . . states that 

 thousands of acres of wheat and grasslands and clover fields 

 were absolutely striped of verdure" (p. 121). 



The eggs are laid into the ground. 'The larvae, which 



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