l894-] ENTOMOLOGICAL NEWS. IT 



Hermit Lake, Mt. Washington, N. H. ; twenty-two from the 

 same locality collected Aug. 2, 1890, and two from near Fabyan's, 

 White Mountains, N. H., Aug. 22, 1889, by myself; eight from 

 Lake St. Regis, Franklin County, N. Y., by Mr. J. Percy Moore; 

 two from Pictou, Nova Scotia, by Mr. W. Sheraton; two from 

 Sherborn, Mass., by Mr. A. L, Babcock; two from the Catskill 

 Mountains, N. Y., August 28, by Mr, E. M. Aaron (A. E. S.); 

 one from St. Johns, Newfoundland, by the Peary Relief Expedi- 

 tion (Phila. A. N. S.). I have not been able to separate the 

 females of this species from those of Ai. consirida, verticalis, etc. 



In view of the existence of Dr. Scudder's careful and detailed 

 description of eremita, it will be necessary here to note merely 

 those variations from his description and from Dr. Hagen's A^- 

 ?,zx'\^\\oxi oi clepsydra (Syn. Neur. N. A., p. 122, 1861) which 

 are revealed by a study of the above material. 



The black line on the fronto-nasal suture is present in all the males (23) 

 from Hermit Lake, in the one from Newfoundland, in one from the Cats- 

 kills, and in one from Lake St. Regis, but absent in the remaining four- 

 teen.* 



The single male from Lake St. Regis which possesses this black line 

 approaches the males from Hermit Lake in the shape of the sup. app. 

 more closely than do any of the other seven from Lake St. Regis which 

 have not this black line. Nevertheless, the transitions in shape of the 

 sup. app. between all eight from Lake St. Regis are very gradual,. 



The number of teeth on the auricles varies as follows : 3-6 (Hermit 

 Lake), 3-4 (Lake St. Regis), 3-4 (Catskills), 2-4 (Sherborn), 3 (Newfound- 

 land, Fabyan's); their number is frequently different on the right and left 

 auricles of the same individual. 



The blue spots oti the tenth abdominal segment are confluent in three 

 males from Lake St. Regis, not confluent in the remaining thirty-seven. 



The shape of the superior appendages is the most important structural 

 character involved in this discussion. The variation is shown in the ac- 

 companying series of seven figures. 



\ u 



Dorsal view of apex of right superior appendage of a series of males of Aischna clep- 

 sydra Say, from various localities. (Enlarged.) 



I. Lake St. Regis: 2. Fabyan's, N. H.; 3. Lake St. Regis; 4. Pictou, N. S.; 5. Lake St. 

 Regis; 6, 7, Hermit Lake; 6 is from the original type of eremita Scud., quoted in the text. 

 Some of the denticulations on the carina are shown by minute circles. 



* Dr. Hagen writes of M. eremh[ic\a, " The black anterior line on the front is soma- 

 times wanting." Proc. Bost. Soc. N. H. xviii, p. 34. 



