80 CALOSOMA SYCOPHANTA. 



Repeated examinations were made during the summer of 1909 of the colonies 

 liberated in 1908, and in each one, except the Hammond Street colony, a record of 

 definite and satisfactory reproduction was secured. Considerable spraying was done 

 along Hammond Street, and as this colony was liberated near the road it is very proba- 

 ble that the beetles migrated after they emerged from the ground. On August 31 

 several molted skins were found 500 yards from the center of the colony, which indi- 

 cates that the beetles had migrated. Some of the trees in and around this colony were 

 cut during the previous winter, and this may have had a tendency to induce the 

 insects to migrate to a more secluded place. 



In 1910 all the colonies liberated in 1908 were found in good condition, and the 

 Heath Street colony also showed satisfactory reproduction and spread. 



It might be added that the conditions in this town were not ideal for the colonization 

 of Calosoma sycophanta, as a large amount of spraying had been done, which so reduced 

 the number of gipsy moth caterpillars that it is probable that in such areas the beetles 

 find it necessary to migrate after the effect of spraying becomes noticeable on the 

 caterpillars. 



During the time that has elapsed since these colonies have been planted, the ones 

 on Newton Street and South Street have joined, spreading over the very considerable 

 area indicated on the map. The Heath Street colony has also joined with a colony 

 liberated in 1908 on Newton Street in the city of Newton, near the Brookline line. 

 The reproduction in the last mentioned colony will be considered under the colonies 

 in the city of Newton. 



Burlington. — On May 8, 1906, Mr. Titus released 40 beetles in badly infested wood- 

 land about 1 mile west of Cummingsville, in the town of Burlington. This colony 

 was visited several times during the year, but no beetles were found. On July 16, 

 1907, Mr. L. S. Winchester began scouting operations in this colony, and continued 

 the work for about 10 days. On July 17 he found several Calosoma larvae, and 

 continued to observe specimens working under burlaps almost every day that he 

 visited the colony, but no beetles were seen. A total of about 50 larvae was found by 

 him. 



In 1908 several examinations of the colony were made, and on July 17 a dead beetle 

 and 3 molted skins were found. The gipsy moth caterpillars were very scarce in the 

 center of this colony, and undoubtedly migration from this locality had taken place. 



On June 21, 1909, 3 Calosoma beetles were found under burlaps, but no molted skins 

 were discovered later in the season. Qn October 16 the woodland surrounding the 

 colony was examined by Messrs. Schaffner and Proctor, and a few molted skins were 

 found three-fourths of a mile from the colony. Later in the season more of the sur- 

 rounding territory was examined, but no more evidence of the beetles was found. 



In 1910 only a few molted skins were found, and these were a considerable distance 

 from the center of the original colony. A large amount of territory was examined in 

 this section of Burlington, without proving that the beetles were present. It might 

 be said, however, that large areas of woodland in this region have been practically 

 killed by the gipsy moth, and hence the infestation is not so bad as in some other 

 sections where an abundance of foliage offers food for the caterpillars. 



A colony that was liberated in North Woburn in 1907 had spread in 1909 to the 

 northeastern part of Burlington, and in 1910 some beetles were found in this area. 



Carlisle. — On June 22, 1910, 50 male and 50 female Calosoma beetles that had been 

 received from Europe the previous day were liberated in badly infested woodland 

 about 1 mile east of the Carlisle station. 



Chelmsford. — On June 22, 1910, 50 male and 50 female beetles received from Europe 

 the previous day were liberated in woodland where gipsy moth caterpillars were 

 abundant. This colony was located near Billerica Road, about 1 mile from Chelms- 

 ford (enter. 



