142 SIXTH ANNUAL REPORT 



I have not reared this species from the egg to the imago as I have 

 the smaller species, but it doubtless goes through the same number of 

 molts, as I possess five diiferent sized heads. It is probable, however, 

 that the number will not correspond in the festival and autumnal 

 broods ; for I have reason to believe that some of my first brood of 

 LyccLon larvae went through but three molts ; while I have watched 

 Herse go through the third molt after it had ceased feeding in the 

 fall, with scarcely any perceptible enlargement of the head — this 

 third head being of smaller size and browner color than the corre- 

 sponding one from the first brood. 



Both species are found on the lower branches of the trees more 

 especially, and very seldom on the higher. 



PARASITES. 



The Tawny Emperor is evidently most prolific, and one would sup- 

 pose that it would be the most numerous; but its eggs, being laid in a 

 batch, are more apt to be destroyed in great numbers by cannibal and 

 parasitic insects. Such, indeed, is actually the case ; for, while I have 

 yet found no parasites on Lycaon, of ten batches of Herse eggs eight 

 have been found more or less infested with a minute Chalcid-fly, one 

 fly to each egg. 



The egg thus infested becomes purplish, so as readily to be dis- 

 tinguished from the sound ones, and even when empty, an egg that 

 has been parasitized is easily recognized by the crown being per- 

 forated instead of lifted up. I have not reared the parasite, and have 

 been unable to extricate any perfect s|)ecimens. From fragments, 

 the species seems to be blue-black ; what appear to be the front tibiae 

 have a prominent spur lacking in the others, while the antennae seem 

 to be 6-jointed, 2 being twice as long as bulbus, 3, 4 and 5 suhequal 

 and half as long, 6 fusiform and as long as 2. It evidently belongs to 

 the Trichofframmidce. and comes near Brachista. 



BIBLIOGRAPHICAL. 



For forty years past these two butterflies have been known in 

 entomological works by the names of Apatura celtis Boisd. and A. 

 Clyton Boisd. Even in Mr. Edwards's recent work* these familiar 

 names were, retained. But in Mr. Scudder's Revisionf these insects 

 are referred to under the generic name Doxocopa, and the specific 

 names which I have here employed. 



Of the generic name it need only be said that Apatura was cre- 

 ated by Fabricius in 1807; Doxocopa by Hiibner in 1816. From 

 information kindly communicated by Mr. Scudder, the latter genus 



* The Buttei-flies of K. A., by AVm. H. Edwards, Philad., l!H68-7-i. 



t Sys. Rev. ofSome of tlie Am Butterflies, byS. H. Seiiddor; Salem Mass. , \S~-l. 



