July-August iSSS.] PSYCHE. 87 



species are to each other and how very in a more logical order than before, 

 distinct some that were supposed to be Ausonius, a somewhat anomalous 

 doubtfully separable. This has led to species, is included in the list as found 

 some further examination of the eccen- upon the confines of New England, 

 trie abdominal appendages of the males, The only known specimen having been 

 and to a new arrangement of the groups only partially examined (Mr. Lint- 

 proposed by Mr. Burgess and myself ner kindly permitted me to remove 

 (Proc. Bost. Soc. Nat. Hist., v. 13, p. enough scales to study the more pro- 

 2S2-306, pi.) when we first described minent characteristics), such features 

 these organs. The following table as it is only presumed to have in corn- 

 brings out the more striking features mon with its nearest ally, are placed in 

 and arranges the New England species brackets. 



A. With subapical white spots on fore wings. Terminal hooks of 

 upper organ of $ genitalia separate ; blades of 

 clasps very long, especially on left side, when com- 

 pared to the main body. Costal fold furnished with 

 long jDediform bristles, curving at base, but with no 

 thread-tipped tapering scales, or apple-seed shaped 

 scales, or twisted ribbons. 



I. Species of smaller size. Upper organ of $ genitalia without 



a crest; tooth of same reduced to a bristle; basal 

 process of left clasp unarmed ; the blade very slender. 

 Costal fold with many long rod-shaped scales ending 

 in two minute points. 



a. Processes of left clasp of J" genitalia almost as slender 



as the blade. The smaller boat-shaped scales of the 



costal fold often no more than twice as long as broad hicilitis. 



b. Processes of left clasp much broader than the blade. 



The smaller boat-shaped androconia rarely or never 



so short as above persius. 



II. Species of larger size. Upper organ with a distinct prickly 



crest; tooth well developed; basal process of left 

 clasp armed with spinules ; the blade moderately 

 slender. Costal fold with no 3-pronged rod-like 

 scales and the different species of this group show 

 no distinction in androconia. 

 a. Crest of upper organ of $ genitalia slightly elevated and 

 bearing a vertical shield expanding apically : lobe of 

 right clasp dactylate, curving inward .juvcnalis. 



