92 Psyche [June 



43, there is no mention of Adias rossi. Neither is it mentioned in 

 the "synopsis" on page 78, where only lima is Hsted, 



Another variety of Tropcpa luna, is Walker's dictynna. Cat. Lep. 

 Het. Brit. Miis. VI, 1264. The description is as follows: "Yel- 

 lowish green. Head and fore part of the thorax whitish. Thorax 

 with a broad purple band in front. Wings with an exterior slen- 

 der incomplete pale brown band, which is most incomplete on the 

 hind wings. Fore wings with a purple costal stripe, from whence 

 a short branch proceeds to the vitreous ocellus; the latter is trans- 

 versely elliptical and is bordered with brown, tawny, black, blue 

 and black on the inner side, and with lilac, red, luteous and fer- 

 ruginous on the outer side. Hind wings with a round ocellus, 

 larger than that of the fore wings, but with the like disposition of 

 colours; tails rather shorter than the breadth of the hind wings. 

 Length of the body 12 lines; of the wings 52 lines. 



"This species much resembles T. luna, but may be distinguished 

 by the band on the wings, by the not empurpled exterior border, 

 by the fore wings, which have a less oblique and more straight 

 exterior border, and by the hind wings, which have shorter tails." 



Variety dictynna is to be found more abundantly in the South- 

 ern United States. 



ON A SUPERNUMERARY MEDIAN OCELLUS IN MEL- 

 ANOPLUS FEMLTl-RUBRUM. 



By M. W. Blackman, 

 Zoological Laboratory, Syracuse University. 



In conducting laboratory work upon invertebrate forms, the 

 teacher often has opportunities for observing interesting abnor- 

 malities of various organs both internal and external. These 

 unusual structures are as a general thing very apparently due to 

 injuries followed by a more or less successful attempt at repair or 

 regeneration. Occasionally, however, anamolies occur which seem 

 hardly to fit in with such an explanation and which must be classed 

 as congenital. It is the belief of the writer that such cases should 

 be reported even though no adequate explanation of the reason 

 for the abnormality can be offered. 



In insects the ocelli are usually present to the number of three — 



