24 Bulletin of the Brooklyn Entomological Society Vol. IX 



In a hollow to the west of the village and along the main 

 road Calosoma frigidum was found in considerable abundance; 

 also C. willcoxi, but in less numbers. There were about four of 

 the former to one of the latter. These beetles were engaged in 

 destroying the caterpillars, and a willcoxi was seen to run down 

 a tree trunk and seize a caterpillar, which was prom.ptly devoured. 



When pursued the Calosoma would let go of the tree trunk, 

 fall to the ground and try to hide among the dry leaves, which 

 they often did so effectually as to prevent their discovery. Or 

 they would at first try to climb the tree to a place of safety, or 

 run horizontally around the tnuhk in order to avoid detection 

 after the manner of squirrels and some Orthopterous insects. 

 A considerable number were observed on the branches of the 

 trees, even out on the small twigs, and, if the trees were jarred 

 suddenly, they would often fall to the ground and scamper away. 



On the first afternoon of our visit when the sun was warm, 

 a number of mated pairs of frigidum and one of willcoxi were 

 observed. In one place seven frigidum were seen in an area of 

 about a yard square. This gathering consisted of three pairs and 

 an individual. 



A considerable number of Hister were also found among the 

 dead leaves on the ground, and they no doubt were either feeding 

 directly on the caterpillars, as they are known to do, or in some 

 way profited by their presence. 



Calosoma frigidum was found in some numbers, June 26, 

 1910, at Rockaway Beach, L. I., and willcoxi has occasionally 

 been found at the same place. The writer and all of the members 

 who attended the Society's Decoration Day field excursion had 

 never seen these beetles in such abundance as we found them in 

 the woods about Wading River, though well aware that allied 

 predaceous beetles are often very common in parts of Europe. 

 *Identified by Mr. Schaeffer as H. immunis Erichson. 



Animal Communities in Temperate America. 



A study in Anirr.al Ecology, By. V. E. Shelford. Bulletin 

 No. 5 Geographic Society of Chicago. 



University of Chicago Press, 380 pp., 300 figs., maps, 

 diagrams. $3.22 postpaid. 



