THE GENUS CALOSOMA. 



55 



Dejean, in 1826, reported the species common in Germany and 

 northern Europe but more rare in France. J. T. Dawson, in 1854, 

 stated that the species occurred on oaks in different localities in Eng- 

 land and Ireland. The following reference is quoted from J. T. Harris, 

 published in 1865-66. 1 



Occurrence of Calosoma inquisitor near Burton-on-Trent. In a woodland near 

 here I was fortunate enough, early in June last, to take about 30 specimens of this 

 insect and could have taken more. I found several in the sunshine and also, just at 

 dark, moving about freely on the stems of the oak trees but did not observe many 

 during the daytime high up on the branches, as described by Mr. F. Plant in "The 

 Zoologist" some years back. J. T. Harris, 31 Lichfield St., Burton-on-Trent, July 3, 

 1865. 



The larva of this species was first described in 1867 by J. C. Schiodte 

 in his remarkable work, "De Metamorphosi Eleutheratorum Observa- 

 tions, " 



C. Houlbert and E. Monnot, in 1905, published on the species, 

 describing the adult and giving a short description of the larva. 

 They named many localities in central France where the species is 

 known to occur. 



IMPORTATIONS. 



All importations of this species in 1906 were forwarded by Miss 

 Marie Ruhl, Zurich, Switzerland. The exact localities in Europe 

 where collections were made could not be ascertained, as the speci- 

 mens were forwarded to her, then repacked and shipped to the gipsy 

 moth parasite laboratory. 



Table 11. — Importations of Calosoma inquisitor from 1906 to 1910. 



Year. 



Number 

 living. 



Received 

 dead. 



1906 



280 



170 



1907 



1908 



1 



91 

 143 





1909... 



4 

 36 



1910 



Total... 



515 



210 



The mortality during transit was much greater in 1906 than in 

 later years. A change in methods of packing and shipping gave bet- 

 ter results. Most of the living specimens were liberated very soon 

 after receipt but a few were kept for cage and jar records in order 

 that closer observations might be made. 



HABITS OF ADULTS. 



Experiments showed that these beetles are very agile on the trees 

 and that they prefer running up and down the trees rather than 

 remaining on the ground. Their favorite hiding place is in the 

 crotches of trees. These observations bear out those of J. T. Harris 

 in 1864-65, which are quoted in another part of this paper. This 

 species has habits similar to C. frigidum in all stages. The adults of 

 both species intuitively search' for their prey in trees, finding cater- 

 pillars that feed upon the foliage. 



i See Bibliography, p. 62. 



