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ON HEKMAPHRODITISM IN AXTS. 



By Frederick Sjiith. 



A SINGULAR specimen of Myrmica Icevinodis was captured 

 in Dunham Park, Cheshire, by Mr. Joseph Chappell, who 

 presented it to Mr. Benjamin Cooke, of Sunnyside Cottage, 

 Bowdon, near Manchester. It combines characters of male, 

 female and worker : the right side is entirely Avorker ; 

 on the left side the head is female, hence v/e see an 

 ocellus, and antenna exhibiting the characters of the female ; 

 but the left side of the thorax is certainly male, and conse- 

 quently the mesothorax has, in front, a deeply-impressed 

 oblique line— in an ordinary male of this species there are 

 two such lines which form a V-shaped space, which is not 

 found in either the female or the worker — the metathorax, 

 on the left side, is destitute of the spine which characterizes 

 both the female and the worker, the legs on the same side 

 are all male, being longer and much more slender than those 

 of the other sexes. See Frontispiece, fig. 3. This is the first 

 instance of the kind, to my knowledge, that has been ob- 

 served in England. 



Dr. Roger has recorded in the Berlin Entom. Zeitschrift, 

 1857, p. 15, a case of simple hermaphroditism in an ant 

 belonging to the Myrmicidce, found in pine-apple houses and 

 probably a tropical importation, which he described as a new 

 genus and new species under the name of Tetrogmus cal- 



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