THE CANADIAN ENTOMOLOGIST. 15 



Bragg on wild plums at Boulder, Colorado. Without feeling alto- 

 gether confident that betheli is a distinct species, it seems that it 

 must be so regarded unless proof can be brought to the contrary. 



A word may be added concerning the value of antennal measure- 

 ments in the determination of Coccidcie. Those who have used the 

 antennal formuhe have found them very unreliable, and 

 I have long ago given them up. It does not follow, as some uncriti- 

 cally assume that antennal measurements are therefore useless. 

 The best way is to measure the joints of several antennae, and from 

 the measurements plot a "curve." I do this by using semitrans- 

 parent typewriter paper, through which I can see my lined standard 

 sheet. The curves so made will, of course, vary, hardly any two 

 antenna being exactly alike; but except for abnormalities (patho- 

 logical specimens), nearly every species gives quite different curves, 

 while two species, very different in other respects, will give nearly 

 the same curv^e. Some of the widely distributed species give curves 

 almost too variable to be of much service, but in these cases it is 

 possible that the material contains more than one thing. It is also 

 probable that widely distributed forms, living on various plants, 

 are strongly heterozygous, while native species, with uniform en- 

 vironment and more or less restricted distribution, are prevailingly 

 homozygous. It would be worth while for someone to carefully 

 investigate a number of species with this point in mind. 



The names of the members of the Society in the group on 

 Plate I. are as follows: 



First roiv, reading from right to left. — J. D. Evans, Prof. W. 

 Lochhead, Rev. T. W. Fyles, H. H. Lyman, Dr. E. M. Walker, Dr. 

 C. Gordon Hewitt, G. Beaulieu, A. F. Winn, Rev. L. Marcotte. 



Second row, reading from left to right. — L. Caser, Dr. E. H. 

 Blackader, Rev. J. B. Mignault, Rev. Brother Germain, H. F. 

 Hudson, Arthur Gibson, J. M. Swaine, G. E. Sanders, Dr. R. 

 Matheson. 



Top row, reading from right to left. — A. G. Turney, J. D* 

 Tothill, Prof. J. E. Howitt, A. W. Baker, J. A. Guignard, J. I. 

 Beaulne. 



CORRECTIONS. 



Page 214, line 7, for heyonice read bryonice. 



Page 214, line 15, for pormiaries read primaries. 



Page 215, line 24, for Keolexia read Neolexia, and for scylina 

 read xylina. 



