1900.] 197 



In one female from Sumatra in Mr. Adams' collection the middle 

 ocellus of the hind-wing is present, but very small ; should there, 

 however, occur examples in which this is well developed, the position 

 of the diagonal band of fore-wing will serve as a distinguishing 

 character, this being placed more obliquely in A. Martini and A. 

 decorina than in A. Eudamia and A. decora. 



There is also an aberration of the female of A. decora, in which 

 the diagonal band of the fore-wing below is broken at the middle 

 median nervule. I have seen only two specimens of this form, one 

 in the collection of Heer Van de Poll, and the other in that of 

 Mr. Adams. 



Ljnton Villa, Sydney Road, 



Enfield : Jime, 1900. 



ON SOME TERATOLOGIC AL SPECIMENS OF LEPIDOPTERA. 



BY SIR GEORGE F. HAMPSON, BART., F.Z.S., &c. 



The following notes on Teratological specimens of Lepidoptera, 

 recently acquired by the British Museum, are published partly be- 

 cause some of the forms are of great interest, and have not yet been 

 described, and partly to indicate the lines on which the Teratological 

 collection of insects of all Orders lately started as a separate col- 

 lection by the British Museum is to be formed, and for help in the 

 formation of which the Museum authorities would be extremely 

 grateful to any of the Entomological public who have interesting 

 specimens which they are willing to add to it. The collection is 

 designed to exhibit all forms of " occasional sport," whether of struc- 

 ture or colour, as opposed to normal, sexual, or geographical variation 

 within ordinary limits, the specimens being arranged in their families 

 and genera so as to show which group and species are most liable to 

 form sports, and as far as possible the limits of this tendency. 



Aectiad.1:. 



Diacrisia rubida, Leech, $ . The fore-wiugs represented by small scales, the 

 whole of the rest of insect fully developed and normal. From Leech Coll. 

 W. China. 



Parasemia plantaginis, Linn. (1), ?. Left hind-wing with the medial part of 

 termen strongly excised : (2) ? . Hind-wings with the orange areas suffused 

 with black. From Coll. S. Stevens. 

 NocTUics!:. 



Triphcena hyperborea, Zett., $ . All four wings with the termen excised, es- 

 pecially the wings of left side. From Coll. S. Stevens. 



