Mar. 1900.] DyAR : On LaRV^ OF THE GeNUS ArCTJA. 41 



associate it with the species with the veins lined, yet, except for this 

 character, it is absolutely the same as phyllira. In fact, several of my 

 old specimens are labelled phyllira, and this is probably the reason 

 that the form was left undescribed by the early authors. Now, the 

 character of the linings of the veins is not fixed in this case, as it 

 usually is. I have two specimens in which the linings do not attain 

 the outer margin ; others in which only the subcostal, median and 

 internal veins are lined on basal portion, in fact true intergrades to 

 phyllira. I feel quite certain that rcctiliiica is only a form ol phyllira ; 

 just the same relation between them as between the western ornata 

 and achaia ; but to clinch the argument, we must do some breeding 

 to get either form from the other. I trust the opportunity will arise 

 to some of us. 



The larva ha? not been described and none of my 22 specimens 

 are bred. The range is all over the eastern part of the country, New 

 York, New Hampshire, Illinois, Missouri and Mississippi. 



13. Phyllira is again a central form around which clusters much 

 uncertainty. My ten specimens do not vary much. There is in some 

 a trace of lining on the median vein, completing the links with recti- 

 linea, and in a itw the bands are somewhat broken up and abbreviated; 

 but it is the inner bands that are affected first and the W-mark remains 

 the most distinct. The secondaries are very uniform with the narrow 

 black edge, three submarginal spots and small discal spot, the latter 

 sometimes absent. The species is southern in its range. I have noth- 

 ing north of Maryland and most of my specimens are from Florida. 

 This is surprising if we have to do with an alternative form of recti- 

 liuca ; but may be due to the smallness of the collection, as phyllira 

 is not often taken now. Or else it may be due to climatic causes. 



The larva was figured by Abbot and Smith in 1797. There are 

 no descriptions since. I have, however, blown specimens from the De- 

 partment of Agriculture (no. 2494) and they agree sufficiently with 

 Abbot's figure. The insect is brown-black, mottled, with shining 

 dorsal warts and a distinct, pale yellow dorsal line that widens almost 

 to spots in the center of each segment and is narrowed, or even broken 

 in the incisures. The hair is short, black and bristly, grayish sub- 

 ventrally. 



Most of the details of the life history remain to be determined. 



Celia Saunders (^franconia Hy. Edw, ) has been made a synonym 

 of this species. It differs in the yellow secondaries with a strong ten- 



