202 



rSCYHE. 



[May, iQOi 



Marginal 

 spines. 



32 long 



40 " 



36 " 



40 " 



52 " 



44 " 



36 " 



36 " 



36 " 



were so 

 the scale 

 variation 



Large spines of 

 lateral cleft. 



80 

 108 

 106 



92 



loS 

 120 



92 



88 



84 



Small spines 

 of same. 



40 

 40 

 40 

 3- 

 44 

 40 

 40 

 28 

 48 



small, the color and texture of 

 s also so variable that with the 

 of the antennae and le""s, I had 



a very strong conviction that the)' should 

 be separate and describe as subspecies ; 

 but certain structural characters, which 

 are without doubt specific, being found 

 in all of the material studied, they must 

 be called forms of the same species. 

 Whether these small forms are due to 

 certain food, locality, season of the year 

 being cold or warm, wet or dry, or the 

 part of the food-plant upon which they 

 were found, are all suggestive questions 

 and have been carefully considered. 



Antennal Segments. Table B. 



Localities and Food Plants. 



On maple, Chicago, 111. 



(Div. of Entomology.) 

 On coliseum ivy, Springfield, Mass. 



(Geo. Dimmock, Sept. 30, 1899.) 

 On white thorn, Methuen, Mass. 



(G. B. King, June 18, 1897.) 

 On Deutzia c7-{iiata, Lawrence, Mass. 



((;. B. King, June 28, 1898.) 

 On Spiraea, Lawrence, Mass. 



(C. B. King, June 10, 1897.) 

 On tree in deep woods, Dracot, Mass. 



(G. B. King, June 8, 1899.) 

 On cork oak, Methuen, Mass. 



(G. B. King, June 12, 1S98.) 

 On dogwood, Methuen, Mass. 



(G. B. King, June 26, 1898.) 



1234567S Size of the 9 Scales. 



40 40 60 44 32 20 20 44 



36 40 72 48 32 20 20 44 3 mm. in diameter. 



40 48 60 60 40 28 24 44 4 J mm. long. 3 broad 



40 40 56 48 32 20 20 44 4 '• " 3 



40 40 52 44 32 24 20 44 4 " " 3 " 



40 40 48 48 28 20 20 40 5 " " ^ " 



40 40 64 52 36 28 28 44 5 " •' 5 



40 40 68 40 32 28 20 40 5I " " 5j " 



36 40 60 48 32 24 24 48 3i " " 2i " 



Front Leg of Same. Table B. 



