86 THE CANADIAN ENTOMOLOGIST. 



10. — L. robiniclla Clem., lac. cit. 



Argyromiges pseudacaciella Fitch., jth Rep., Sec. 333. 



Argyromiges Morrisella ? " " " 336. 



Argyromiges Uhleretta / " " " 33 y. 



An examination of a large series of specimens shows, 1 think. 

 that A. Morrisella, A. Uhlcrclla, and A. pseudacaciella. are merely 

 variations or worn specimens of the same insect, which, having been 

 previously described by Dr. Clemens in an English publication (The 

 Entomologist), should be. called L, robiniclla. There is seme varia- 

 tion in the ornamentation of the species. In seme the apical spot is 

 circular ; in others it is a short streak rather than a spot : there is a 

 difference in the intensity and extent of the brown coloring- of the 

 dorsal margin of the wings, and sometimes the first dorsal streak (or 

 rather that described as such by Dr. Clemens), is divided by a black 

 streak on the dorsal margin so as to make it almost V-shaped. In all. 

 the basal portion of the dorsal margin is black, and in this black 

 portion (near the basal }£) is a paler (or cinereous) dorsal spot or 

 streak, which is between the first dorsal streak of Clemens' and the base. 

 Or. Clemens placed this species in the section having " no basal streak." 

 But the black dorso-basal portion above mentioned is bordered on the 

 fold by a paler, rather cinereous, median basal streak, which curves 

 towards the dorsal margin, and unites with the cinereous dorsal spot. 

 Sometimes, and in some lights, both this streak and spot are indistinct 

 or invisible, but in others they are distinct, and sometimes the streak is, 

 at the base, distinctly white. . //. ex. '4.' inch. Common. Wisconsin. 

 Ken tuckw 



The larva is cylindrical, and mines the leaves of the Locust (Robinia 

 pscudacacia). Dr. Clemens records it as mining the under side only, but 1 

 find it about as frequently mining the upper as the under side, and have 

 frequently bred it from both mines. This is another instance of a cylin- 

 drical larva mining the upper surface. In the multitude of larvae from 

 the under surface that I have examined, I have found no variation in 

 larvce of the same age, and none are marked with macula: ; whilst 

 usually, though not always, the larva from the upper surface has a 

 distinct dark brown macula on top of each segment. The mine upon 

 the upper surface is also rather smaller, and is usually on the midrib, and 



