— 154— 



living in Worth Co., is quite sure he has seen the same species there, 

 but I have seen no specimens."* 



Prof. O. S. Westcott presented the following Entomological Mem- 

 oranda. 



ENTOMOLOGICAL MEMORANDA. 



By Prof. O. S. VVfstcott. 

 L 

 While at Port Arthur, Ontario, Canada, in July, 1888, I was in- 

 formed by Mr. John Merrill of that place, that in June of this year his 

 attention was called to a great gathering of butterflies. On close investig- 

 ation he discovered that the centre of attraction for die butterflies was a 

 dead dog. The fondness of many liiurnals for carrion is already a matter 

 of record and this memorandum is made only as corroborative. So near 

 as could be learned from Mr. Merrill's descriptions, the gathering con- 

 sisted mainly o[ Danai's arc/iippus, supplemented by Limenitis arthemis, 

 Melitcea and CoUas. In all, Mr. Merrill counted one hundred and ten 

 examples. 



IL 



At the same place, July 20th to 23rd, 1888, 1 took nineteen examples 

 of MelifcBa. Of these one was nycteis, and seventeen tharos, eight of 

 the form marcia, and nine of the form morpheus. Qiiery : — Should 

 niarcia and morpheus be found abundantly together during the latter 

 part of July, if, as supposably demonstrated by Wm. H. Edwards, they 

 are 5^a5(?«a/ variations, due to the varying degrees of temperature to 

 which the pupae have been subjected.'' 



IIL 



On a gravel work in the park at Sault St. Marie, Mich., Aug. ist, 

 1888, I gathered twenty pupae, apparently of some Agrotis. The cater- 

 pillars had selected a nearly solid foundation on which to pupate, but, 

 exposed as they were to the foot of every pedestrian, many others had 

 been crushed. Why should they leave the grass plots and resort to the 

 gravel walk as a preferred place for their transformation } 



IV. 



In the monograph of the genus Lachtioslerna'^* Dr. Horn remarks 

 oiL.fusca: "This species is probably the most widely distributed of 

 any in our fauna and at the same time the most abundant wherever it 

 occurs." This opinion is doubtless concurred in by most, if not all col- 

 lectors, and yet some observations I have made for the last two years 



* Since this note was read I have seen specimens from Worth County collected 

 the present season by the student above mentioned. 



** Transactions of the American Entomological Society, Vol. XIV, p. 245. 



