igoo] ENTOMOLOGICAL NEWS. 587 



Fig- 15- — ^thra as to yellow abdomen, veins and wings dark, as in 

 diffinis. 



Figs. 16 and 17.— Serrations of inner edge of outer border of fore wings 

 approaching axillaris in depth. Apex of forewings of No. 17 a little 

 worn by fluttering in cage. 



Fig. 18. — Diffinis or tenuis? Wings barely indented, body colors, as 

 in tenuis. 



These last 9, all from same brood, eggs laid hy tenuis $ on June i, 1900, 

 the mother herself being from an egg laid by diffinis on Aug. i, 1899. 



Thus, eggs laid in captivity by a diffinis 9 in August dis- 

 closed te7iuis the following May, and from eggs laid by a 

 tenuis 9 of this brood, in June, diffinis in various varietal 

 forms, as well as typical, were disclosed the same summer in 

 July. Although my former experiments gave the same results, 

 they were made with eggs and larvae taken at liberty, and there- 

 fore of uncertain parentage, btit these last two broods were from 

 eggs laid in captivity by diffinis and tennis respectively. I 

 thereft)re feel justified in asserting that the proof is unques- 

 tionable that Hemaris tennis and diffiyiis are the same species, 

 tenicis being the early spring form and diffyiis the later sum- 

 mer form, as is the case with ruficaudis and thy she. I have 

 no doubt that axillaris is also only a form of diffinis, as Figs. 

 16 and 17 show an approach to the deep indentations of that 

 species. As to the identity of tenuis and diffinis, Dr. Harrison 

 Dyar writes me : " Should you find it convenient to state in 

 yotir article that I had arrived at the same conclusions as your- 

 self, from an independent study of the mature insects, you are 

 at liberty to do so." 



The species will now, therefore, stand : 

 Hemaris diffinis Bdv. Summer form, 

 aber. cethra Stkr. 



a. tenuis Grt. Spring form from wintering pupae. 



b. axillaris G. and R. 



And very likely others, as brucei, gracilis, thetis, etc. , will 

 fall in as only forms of diffinis. 



EGG AND LARVAL STAGES OF HEMARIS DIFFINIS VAR. 



TENUIS. 



Eggs laid in captivity by Hemaris tenuis June ist, 1900 : 

 &gg 1% millimeters long by \ mm. wide, slightly flattened 



