young people would think that was merely your work. We want inspiration to 

 come to boys and girls through a boy or a girl.' Now I think that is just the 

 situation with you. You can have a greater influence with boys and girls than 

 can one hundred professors and we want to see your work develop the best 

 way possible." 



A SCIENTIST'S VIEWS. 



J. Rennselaer Smith, M. D., Milpitas, Cal., has helped me during the 

 past year by sending me books, literature, notes, records, splendidly written 

 articles, giving me the names of correspondents, encouraging me when I felt 

 misgivings, sending me all kinds of specimens, writing me helpful letters, teaching 

 such of my correspondents as visited him, and now writes: 



"A correspondence course would certainly suit me. Every one has a 

 little different experience, and how helpful it would be to all to get each 

 other's views. Often we are helped by others' failures. You have put the 

 probable cost of a year's instruction at a low figure, $5.00 per year. You 

 could not think of carrying all the burden of necessary expense. You may 

 start my name as number one and I will pay in advance." 



HOW TO DETERMINE THE SEX OF BUTTERFLIES 

 AND MOTHS. 



The male moth is told from the female, at a glance, by the shape of the 

 body, the male having a little tuft of hair at the end of the tail, while the end 

 of the female's body is round and pointed. This rule has exceptions, but not 

 many. The body of the female is often "fat" with eggs, and the shape 

 designates the sex. Sometimes the coloring of the male is very different from 

 that of the female. The body of the female is usually larger than that of the 

 male. 



WANTED: SPECIES OF COLIAS. 



Prof. John H. Gerould of the Department of Biology, Dartmouth College 

 writes : 



"I have bred Colias (Eurymus) philodice on a rather large scale to deter- 

 mine how the white color variety is transmitted from generation to generation 

 and am at work now on the same problem in eurytheme with stock from Ari- 

 zona. I have also crossed these two species. I shall be interested next year 

 in getting stock of other species to hybridize with these and judge that you 

 are in a position to be able to give me a good deal of assistance with the 

 Western species. I shall be very glad to get a list of those that occur in your 

 locality. A price-list of mounted specimens,, or in papers unmounted, would 

 be acceptable. 



"In a recent pure culture of eurytheme from a white female I got a 

 hemaphrodite, chiefly male, with the male color pattern, the right front wing, 

 however, having the female color pattern, with the ground color a mosaic of 

 white and orange. The same strain, inbred may give more of this sort, though 

 the individual itself left no progeny. White clover is the food I use for both 

 species. I have a large number of cultures of various sorts now growing." 



