THE CANA.DIAN ENTOMOLOGIST. 125 



scarcely a crevice of the bark but what is filled with the yellow pupal 

 forms which will in a few days disclose the imagines. The ground imme- 

 diately surrounding the base of the trees is covered with the pupae, which 

 have been dislodged from their positions in the bark by the eager efforts 

 of larvae crowding in the crevices to undergo transformation. As this 

 change occurs within the crevices of the bark of trunk and limb, it 

 becomes impossible, unless at great labor, to apply means for extermin- 

 ating the pest. The evil, however, is likely to cure itself, for the larvae 

 are so numerous, and such insatiate feeders, that starvation will probably 

 end the visitation. Much good, however, can be done by brushing down 

 the trunks of the trees, sweeping the ground immediately beneath, and 

 destroying the entire mass by fire. 



FURTHER REMARKS UPON THE VARIATION OF THE 

 ELYTRAL MARKINGS IN CICINDELA SEX-GUTTATA. 



BY C. H. T. TOWNSEND, CONSTANTINE, MICH. 



Having been away from home the greater part of the summer, I regret 

 that I have not been able to collect some of these beautiful beetles this 

 season, so as to further observe the interesting relation between the varie- 

 ties in number, as I should like to have done. I hope, however, that 

 some one has made observations upon them, and will favor us with an 

 account, which would, no doubt, be very acceptable to those interested in 

 the genus. 



Since contributing the first notes upon this subject, I have noticed that 

 Say has described two varieties of C. sex-guttata in his monograph of the 

 genus Cicindela, commencing on page 415, vol. ii., of the American 

 Entomology, edited by LeConte. The first is 



" Var. a. Elytra each with an additional spot, which is fulvous or 

 white, and generally inconspicuous, placed behind the middle triangularly 

 with respect to the two anterior, marginal ones." 



This additional spot is the one I have called the fourth, and var. a of 

 Say therefore includes the second and third varieties given in my table 

 (Can. Ent. xv., 208), as the description says that this fourth spot is 

 " generally inconspicuous," implying that in occasional specimens it is 

 conspicuous ; in the second variety of my table this spot being rudi- 

 mentary, while in the third it is well developed. This phrase also implies 



