No. 4.] GYPSY MOTH — APPENDIX. 413 



Calosoma scrutator (Fab.), Ccdosoma frigidum Kirby, 

 Calosoma calidmn (Fab.), Harpalus caliginosus Say., Ilarpa- 

 lus pennsylvanicus (DeG.), Cicindela G-guttata Fal).* The 

 larvae of two species of ITarpcdus have been reported by 

 Mr. C. H. Rowe as feeding on yoiinp;: gyps}^ moth cater- 

 pillars. Platynus limbaius (Say.) has been found feeding 

 on the pupse in the field, Dermestes lardarius Linn., reared 

 from pupae, and Pthins bninnens Duft., reared from the 

 esfof-clusters. Several undetermined beetle larvae have also 

 been found feeding on the eggs.j 



No new species have been found this year attacking the 

 gypsy moth, but the life histories and habits of some of the 

 more important of these beneficial insects have been investi- 

 gated, with a view to obtaining a more accurate knowledge 

 of the conditions favorable to their multi]ilication. The 

 following pages contain the points of interest learned con- 

 cerning these beetles, together with notes on the life histo- 

 ries of Calosoma frigidum and O. calidum. 



Distribution. — The species of Calosoma and Harpalus 

 above mentioned are as a rule quite generally distributed 

 throughout the infested district, although they occur chiefly 

 in sections to which, by reason of their peculiar habits, 

 they are particularly adapted. Of these species, Calosoma 

 scrutator is the least common, no doubt, for the reason that 

 its large size, brilliant color and clumsy movements render 

 it more susceptible to the attacks of its various enemies. 

 Its occurrence is limited chiefly to wood and brush land. I 

 am informed that the Ccdosomas, especially scriUator and 

 calidum, are very abundant in brushland near the salt 

 water at Belmont, N. J., so much so that it is very common 

 for visitors to catch the brilliantly colored scriUator and 

 wear it as an ornament. The occurrence of this species, in 

 eastern Massachusetts at least, is more limited, and it is 

 considered by many local collectors as a very rare beetle. 



Calosoma frigidum is much more common, and is found 

 in orchards where the grass has not been cut, in wood and 



* Reported bj^ Mr. Samuel Ilenshaw, Bulletin Xo. 26, U. S. Dept. Agri. Div- 

 Ent., page 75 

 t " The Gypsy Moth," Forbush and Fernald, pages 38 i and 385. 



