4G Journal New York Entomological Society. [Voi. v. 



beliefs than I am conscious of possessing. I think I should believe 

 with difficulty that a purely structural character, noc correlated with 

 habit, could be twice evolved in the same limited group. But I cer- 

 tainly have believed that the larva of Aglia is derived from the main 

 stem of the family Agliidce and quite independent of the Saturiiiidx, 

 and I believe this still. I think that these supposed contradictory lar- 

 val characters can be straightened out to accord with my classification. 

 It seems to me that Dr. Dyar has failed to notice my genealogical tree 

 in its vertical aspect. My friend is not impressed as I hoped he might 

 be with this magnificent specimen of zoological gardening. The verti- 

 cal sequence is : Attaais, 



Sati/r?iia, 

 Aglia, 

 Hemileiica, 

 Citheronia. 



But I have separated the interlacing branches and show that there 

 are two natural main stems, to the higher of which I most decidedly 

 refer Hemileiica. Aglia has so grown over toward the Saturnians that 

 Dr. Dyar fails to find its real issue. It does not follow, because Dr. 

 Dyar has converted me fully to the value of the larval tubercles, that I 

 should be equally fortunate, on a much more modest scale, and bring 

 him round to the transposition of Hemileiica and Aglia. But I may 

 hope to do so. In my original paper I am much indebted to Dr. Dyar 

 for information, without which I could not have cleared the superfamily 

 from alien families which had found place in it, nor have made my 

 paper so complete. This gratitude is not in the slightest way impaired 

 by my attempt to rescue my classification in this one particular from 

 an adverse criticism. I am glad of the occasion to insist upon the 

 seeming greater reasonableness of my views. . 



The difficulty in the way of believing that Hemileiica has inde- 

 pendently attained the type of Saiurnia lies in the physiological steps of 

 the progress. It appears to Dr. Dyar to be merely an approaching of 

 vein IV2 to vein IV ^ at base, but I have shown that vein IV ^ remains 

 nearly quiescent ; it is the cross-vein which becomes transformed so as 

 to form a continuous part of the vein.* It is part of a general mor- 



*As I have shown, the cross-vein between IV^ and IV, becomes oblique in 

 Aglia and Citheronia, and shows a step towards Saturnia or HefiiiUuca ; therefore 

 so far as the radial evolution is concerned, the two first are the lower. The affinity 

 of Aglia and Citheronia lies in the fact, that in both groups the initiatory movement is 

 displayed. Hence I derive Aglia from the main stem before Citheronia and after 

 Autovieris had left it. 



