THE CATALPA MIDGE. 13 



way, a straight skyward growth is forced and, although the young 

 trees start off with crooked trunks due to successive forkings, 

 caused U"^ terminal injury, after a few years the trunks will have 

 become qoite straight. After the trees, have attained an age of five 

 or six ytars alternate trees can be cut out, if necessary, and the 

 trees mayibe trusted after this age to grow fairly straight. 



^<j^^l ACKNOV'vLEDGEMENTS. 



lam" -'^^:pM^'is V'-ard, Felt, Coquillett and Craw- 

 ford for < *' TS'^LLETII*?"^ various specimens of insects 

 submitt' '^ress of the investigation; to 

 Messr jtn and H. T. Osborn for numer- 

 ous fiel .^ ory records; to the Department of 



I Cooperati' , Station for assistance in collecting 



data from Jatalpa; and to Messrs. Goodwin and 



Houser f< COTTONY M>'^^^^^" '^° ^^^ °^ *^^ foregoing, I 

 express n' 



