INVKSriCAIlOX OK LIFE lllSTOKV, 



EXPERIMKNTS IN FEEDIN(i LaRV/E. 



35 



AMOUNT OI KOOD REIHIRKU. 



l~)uriii<j: tlio sumnior of 1!)()S two series of experiments were con- 

 clucted for the |)uri)ose of (leterniiniiig the miniber of caterjHllars 

 wliioh would be eaten by larvie of Calosoma s\icoplianta from the time 

 of hatching until rea<ly for ])U|)ation. Each lai'va was placed in a 

 jelly glass with a small amount of earth, and caterpillars were sup- 

 phed daih' and a record kept of the number eaten. The first set was 

 begun May 'J.3. with a few larya\ and records were kej)t of luniierous 

 others wliich hatched from that time until ]\Iay 28. The eggs from 

 wliich these hatched were deposited by beetles that were removed 

 from hibernation <luring Mai'ch and April. vSixteen lai"V£e were fed in 

 this exj)eriment and the amounts wliich were eaten will be found in 

 Table VI. 



Table VI. — Food eaten by larr:r of Ciilosoma syeojjhantd. 



May 23. 

 May 24. 



Do. 

 May 25. 

 May 26. 

 May 27. 



Do. 



Do. 



Do. 

 May 20. 

 May 27. 

 May 28. 



Do. 



Do. 



Do. 



Do. 



Date hutched. 



1908. 



Brown- 

 tail moth 

 cater- I 



pillars, ponrfh 

 fourth I ronnn 



Gipsy moth caterpillars. 



stage. 



stage. 



Fifth 

 stage. 



Sixth 

 stage. 



Total. 



l>7 

 80 

 93 

 79 

 82 

 82 

 83 

 70 

 89 



On June 19 a similar experiment was begun, and between that tlate 

 and July 1 larvse were added, so that, in all, 19 individuals were fed 

 from the time of hatcliing until they were full grown. These larva? 

 developed from eggs laid by female beetles that came out of luberna- 

 tion normally in June, 1908, while those in the previous set were the 

 ])rogeny of females that had been removed from hU)ernation and were 

 fed in the laboratory under unnatural conditions. 



