132 ENTOMOLOGICAL NEWS. [May r 



One of the most interesting features of this small collection is 

 the very dark color of the insects. The specimens of the Lao- 

 dama fusca, and also of Pyrausta torva/is, are much darker than 

 any I have ever seen before, either of those taken in New Eng- 

 land or in Labrador, but when we recall that Mr. Mengel states 

 that they rest on the lichen-colored rocks we have not far to seek 

 for the cause of this dark color. The lichens, which almost en- 

 tirely cover the rocks in northern regions, are very dark brown 

 or black, and when insects habitually rest on such places the 

 lighter colored varieties are more easily seen and destroyed by 

 their enemies and the dark forms are left to propagate the species, 

 and, as a result, a dark race is formed in time. 



Third Addition to the list of Dragonflies Odonata of 

 Manchester, Kennebec County, Maine. 



By Miss MATTIE WADSWORTH 



(See ENT. NEWS, vol. i, pp. 36, 55 ; vol. ii, p. n ; vol. iii, p. 8. 



lOfl. Lestes ung-uiculata Hag. 



1890, July 15, one over Snake Pond ; recently determined, 



6/. Enallagrna pollutum ? Hag. 



1893, June 29, two teneral $ S near Lake Cobbosseecontee. 



43ffl. Celithemis elisa Hag. 



1893, June 22, one 9 in pasture near woods. 



39. L-eucorhinia proxima Calvert. 



The 9 of this species has not been recorded from this locality. 



1892, June 15, one $ near brook. 



1893, June 18, 20, July n, one 9 each day, all near brook. 

 These have been identified, as all others have been, by Mr. P. 



P. Calvert, of Philadelphia. 



Fifty-seven species of dragonflies have now been found in this 

 place, and forty-five of these were seen or taken, during 1893. 

 Of the rarer species but few were noted: one Cordulia (Somato- 

 chlord) lepida Selys, one Gomphus parvulus Selys, and a G. 

 spinosus Selys, were taken. The only Epitheca (Somatochlord) 

 forcipata Scud, seen, was sufficiently accommodating to alight 

 on the house and be taken by the hand. One Fonscolombia 

 vinosa Say was found on the window, in the horse's stall. 



