1891.] ENTOMOLOGICAL NEWS. 93 



their heads clinging to the gash, which is held together until the gash is 

 perfectly healed. 



MIMICRY of Datiais archippus presented itself very strikingly early in 

 September, 1889, while looking for Catocala in wood lot well cleared of 

 undergrowth. It was in Astoria, Long Island, late in the afternoon when 

 about to return home that I noticed many Danaida? flying singly and in a 

 restive way toward a circular clearing on edge of woods, and would in- 

 variably disappear in the foliage as I supposed it to be. I lingered there 

 for half an hour and observed their coming in from meadows adjoining, 

 and wondered why they were flying so high when they reached the timber 

 line, and many passing out of sight at a particular spot of that circular 

 clearing. I stationed myself closer and almost under overhanging 

 branches of a Swamp Maple (Acer nibnini), on which I noticed an ap- 

 parently dead or dying branch, having the red leaves of Autumn foliage 

 thereon. It contrasted strangely with the verdure of other branches and 

 trees of vicinity. I have seen such branches in August destroyed by the 

 agency of Locusts (Cicada septemdecim} and much resembling that in 

 question. Presently I observed a Danaid circling overhead for a few 

 minutes, flying towards this branch and alighting on underside of one of 

 its branchlets, then dropping and folding up its wings hurriedly. One 

 more leaf had now been added, and the mimicry revealed to my senses. 

 It was as perfect as it could be. Every Danaid hung or rested there limp 

 and lifeless as it were, and not in the least disturbed by the jarring occa- 

 sioned by subsequent arrivals of others. The lowest part of this dead 

 limb, which it was, because devoid of any leaf, was twelve feet above 

 ground, so that I could not reach it with my net. I calculated that from 

 six to eight dozen Danaids were thereon. I tossed the net upward, 

 shaking the limb when it came in contact with it, and the air seemed to 

 be brilliant with fulvous tints of terrified butterflies. I subsequently re- 

 visited the spot twice during the following week, but failed to observe 

 Danaids in same locality or tree. RICHARD E. KUXZE, M.D., New York. 



NOTES ON MT. DESERT DRAGONFLIES. The following species of 

 Odonata were taken during the Summer of 1890 on the island of Mt. 

 Desert, Maine, and within a few miles of the village of Bar Harbor. 



I am indebted to Mr. Philip P. Calvert, of Philadelphia, who has kindly 

 identified the specimens for me. The notes on the colors of the eyes 

 were made while the specimens were fresh and not yet faded. 



AGRIONIN^E. 



Argia violacea Hag. July ist, 



Ischnura rcrfica/is Say. Orange variety. June 25th, i ; <-y<s brown 

 above. 



Enallagma Hagcni Walsh. July ist, i $. 



AKSCHNINM:. 



Neurceschna I'inosa Say. July 25th, i ^; eyes greenish, becoming 

 brown above. 



