222 



PARASITES OF GIPSY AND BROWN-TAIL MOTHS. 



conditions, since the tussock moth is rare in the country in eastern 

 Massachusetts, and while it was expected that Compsilura would 

 eventually be recovered as a parasite of this host, it was hardly 

 expected that it would become of importance as a parasite so soon 

 as 1910, or, for that matter, that it would become of importance as a 

 parasite in cities at any time. 



TOWA/S WHERE COMPS/Lt/RA COA/C/NA/ATA 

 WAS FOUA/O PARAS/T/C OA/ &ROWA/-TA/L /A/ /$03 



^TZZAtowa/s WHERE COMP- 



X//// *S/LURA COA/C/A/A/ATA WAS 

 FOUA/O PARAS/T/C OA/ BROWA/-TA/L //V S/T/C OA/ P/ER/S /A/ FALL OF/9/0. 

 /9/0. 



TOWA/S WHERE COMPS/LURA 

 COA/C/A/A/ATA WAS FOOA/O PARA 



Fig. 42.— Map showing distribution of Compsilura concinnata in Massachusetts. (Original.) 



The only one of the localities chosen for the tussock-moth col- 

 lections which was within the limits of Compsilura's distribution 

 so far as known when the work was instituted was in the city of 

 Lynn, Mass., and from this a total of 110 caterpillars was collected 

 on July 18, 1910. On July 29 the tray in which they were contained 

 was carefully examined. Thirteen of the tussock-moth caterpillars 



