Vol. XXvi] ENTOMOLOGICAL NEWS 395 



slm, straight lateral muscle. 



sp.8, site of future spiracle of 8th abdominal segment. 



ts, testis. 



vd, vas deferens. 



vim, ventral longitudinal muscles. 



The Roman numerals I-XI indicate abdominal segments i-ii re- 

 spectively. 



The names of the abdominal muscles are, as nearly as possible, those 

 employed by Matsula in Pfliiger's Archiv f. Physiologic, cxxxviii, 

 PP- 390-392, text fig. i, 2. 1911. 



An Aberration of Vanessa antiopa (Lep.). 

 By ERNST KEIL, Pasadena, California. 



(Plate XVII, fig. 2) 



The specimen figured on the accompanying plate was taken 

 on July /th, 1914, at Granville, Ohio, on the Denison Univer- 

 sity campus by the writer. It was captured in the morning 

 sitting on the trunk of a walnut tree which was one of a large 

 number of trees that had been sugared the night before. The 

 specimen had been enjoying the remains of the night's ban- 

 quet. There were other specimens of Vanessa antiopa cap- 

 tured at the same place and time which were all normal. The 

 specimen in question expands 70 mm., three wings are normal 

 and have the ornamentation of a male specimen. The left hind 

 wing, however, has the blue dots missing altogether, the yel- 

 low edge is about 2 mm. broader than the edges of the other 

 wings and is of a whitish yellow. The rest of the wing is dull 

 black instead of reddish brown, and the vein structure is ex- 

 actly the same as that of the other wings. 



Do Insects Migrate Like Birds? 



Under this title, Howard J. Shannon discusses in Harper's Monthly 

 Magazine for September, 1915, the observed migrations, both northward 

 and southward, in the United States, of the monarch butterfly and of 

 dragonflies like Ana.v junins. He briefly sums up the Kuropean data 

 also, on swarms of Odonata. He considers that insects in migration 

 follow much the same routes as do the birds, and concludes that "ac- 

 cumulating evidences show that the principles and laws governing the 

 better-known bird migrations have a remarkable parallel in the annual 

 movements of certain members of the insect world." 



