[ 163 ] 

 Larvae collected in Echt and Lower Deeside areas. 



Totals 996 3672 4668 21-3 



Larvae collected in Northumberland. 



For purposes of comparison we obtained a lot of larvae from the north of 

 England. These yielded the following result : 



In other areas where larvae were collected in fewer numbers, the parasite 

 was also found and all our observations suggest that it is relatively abundant. 



During the season 1919, Tipula larvae were again collected and further 

 data concerning the occurrence of Bucentes parasites were obtained. 



Search was made for Tipula larvae in fields on the College of Agriculture 

 experimental farm at Craibstone, Aberdeenshire, from the month of December 

 onwards. During December and January only very small numbers of Tipula 

 larvae were found and of these none were infected with Bucentes. In February 

 and March the numbers found increased slightly and out of 56 larvae, three 

 were found infected, one or these harbouring four parasitic maggots. 



From April onwards appreciable numbers were obtained; the data for the 

 season are shown in the table given below: 



Larvae collected in Lower Deeside and Lower Donside. 

 Data for 1919. 



No infected larvae obtained here during period May 9 to June 20. 



