194 THE ENTOMOLOGIST. 



These four forms inhabit the country, at least as far south as 

 Long Island. 



3. At about lat. 39°, on the Atlantic side, two forms of the 

 first generation, viz. L. lucia and L. marginata, are found to have 

 been suppressed ; and the third, L. violacea, remains to repre- 

 sent that generation. The blue colour has, however, become 

 darker, and a melanic male has been developed ; but no melanic 

 female has yet been discovered. 



4. In lat. 40°, at the west, L. lucia and L. violacea are found. 

 The second emergence is L. neglecta; and it is also remarkable 

 that in Colorado a melanic male of the spring emergence is also 

 found. 



5. In Arizona, at or about lat. 33°, L. violacea alone appears, 

 but in a modified form var. cinerea, Edw. The second generation 

 apparently is L. pseudargiolus, Bois. and Lee, no black male and 

 no L. lucia having been taken. 



6. From lat. 40° or 39° southward, in the Atlantic district, 

 the summer generation is L. neglecta ; but there is an inter- 

 mediate or interpolated generation flying in May, viz. L. pseud- 

 argiolus. 



7. In California and Arizona the species is represented in 

 part by what is very near to L. neglecta, or else a small L. pseud- 

 argiolus, viz. L. echo, Edw., but mainly by a modified form, 

 £, piasus, Bois., which has two generations not differing from 

 each other. 



Such is a very brief outline of the changes which L. pseud- 

 argiolus undergoes in the Nearctic Zoogeographical Region. 



I do not find in any of the works of British authors the least 

 allusion to the horeomorphic and dimorphic condition of Lyccena 

 argiolus, Linn., as it exists in these islands. Stainton, Newman, 

 and Lang are silent on the subject ; nor am I aware whether in 

 the more northern districts in which the insect is found, e.g., 

 Cumberland, Westmoreland, and Yorkshire, it differs in any 

 respect from those found in the most southern counties, nor 

 whether in the former districts it is one-brooded, a point I 

 should be very glad to know. 



In my late garden at Blackheath the holly and ivy throve. 

 I had numerous varieties of each, and had therefore opportunities 

 for more than quarter of a century of seeing L. argiolus at the 

 periods of the spring and summer emergences of the imago. I 



