THE CALOSOMA BEETLE IN NEW ENGLAND. 



21 



and to secure data on the abundance of the species and the effective- 

 ness of its work. 



The accompanying map (PI. VIII) shows the territory infested 

 with the gipsy moth in 1914 ; also the areas where the Calosoma 

 beetle was found from the years 1910 to 1914, inclusive. 



DISPERSION OF CALOSOMA SYCOPHANTA. 



Table IV shows the annual dispersion of Calosoma s y cop hanta since 

 it was introduced into Massachusetts. This information has been 

 secured by careful field examinations, and towns have not been in- 

 cluded in the area unless the beetles or their larva? have been found 

 in several localities throughout the town. 



Table IV. — Table showing annual dispersion of Calosoma sycophanta in New 



England, 19 09-19 11,. 



Year. 



Area. 



Year. 



Area. 



1909 



Sq. m. 



9 



106 



425 



1912 



Sq. m. 

 1,615 

 3,003 

 5,445 



1910 . 



1913 . 



1911 



1914 







The statements which follow give a list of the towns and cities in 

 Massachusetts, New Hampshire, Maine, Rhode Island, and Connecti- 

 cut in which colonies of this species have been liberated, the number 

 released, and the places where they have been found as a result of 

 spread from nearby towns. The records are complete up to and in- 

 cluding 1914, and the information is given somewhat in detail, so 

 that it may be of value to owners of property or residents in the sec- 

 tions concerned. 



Massachusetts. 



Ablngton. — No colonies were liberated in this town. Examinations of wood- 

 lands in 1914 resulted in finding traces of the beetles, although little damage 

 was noted by the gipsy moth. 



Acton. — In 1910 a colony of 200 larvae was liberated in the western part of 

 the town. During August. 1912, the larval molt skins were found in many 

 woodlands throughout, and further evidences of the increase and efficiency of 

 the species were reported in 1913 and 1914. 



Amesbunj. — In 1930 a colony of 200 larva? was liberated in woodland off 

 Haverhill Street. August, 1912, examinations showed them to be present in 

 many localities throughout the town, and in 1913 and 1914 further reports 

 indicated that they had become numerous in these sections. 



Andover. — During 1910, 100 beetles were liberated in this town. In 1911 they 

 were recovered in a few localities. They were recovered in 26 different locali- 

 ties in 1912. Additional data secured in 1913 and 1914 showed them to be 

 present in large numbers throughout. These records are indicative that these 

 beetles are common enough throughout this section to be accomplishing an 

 appreciable amount of good as an enemy of the gipsy moth. 



