[91] ON CARADRINA FIDICULAEIA. 203 



to be more usual for the American specimens to have them 

 broader and shorter than the European. 



4 'Only to the first-named modification in the mixture of 

 gray and brown colors, might some importance be attached, 

 since it seems to pertain, although not without exception, 

 to the majority of compared species, and may therefore be 

 referred to a common cause, arising from the different climates 

 of continental eastern North America and insular western 

 Europe. Which of the many climatic factors influences this 

 modification of color whether it is due to the more intense 

 heat and dryness, or to the severe winter of the transatlantic 

 faunal territory, or to both combined and as opposed to the 

 cooler and damper summers and milder winters of the cis- 

 atlantic cannot now be determined. It is well known that 

 the coloration becomes generally darker and blacker as we 

 approach the pole or ascend in elevation ; but it is doubtful 

 if the greater cold of the winter is the real cause of this effect." 



O. fidicularia appears to be a rare species with us. Mr. 

 von Meske has taken it, at sugar, at Sharon Springs, N. Y., 

 on August 15th, in two examples. Mr. W. W. Hill has cap- 

 tured it in Lewis county, N. Y., on August 1st, also at sugar. 

 I have taken it on but one occasion, at Schoharie, N. Y., on 

 5th of September. It has not made its appearance, at sugar, 

 during my two years' collecting by that method at Schenec- 

 tady. Mr. Morrison's example was from the Adirondack 

 region. A species, believed to be the same, and referred to 

 C. multifera Walker, in Vol. I, of the Canadian Entomologist 

 (page 84) was captured at Coburg, Ontario. Mr. Walker's 

 specimen was from Nova Scotia. 



C. cubicularis is stated by Guenee to be very common in 

 the months of June and September. Wood (Index Entomolo- 

 gicuS) p. 44) refers to it as common in gardens and meadows 

 during the middle of June. Dr. Speyer in his Fauna of 

 WaldecJc, represents it as common throughout the month of 

 May, and with a second generation, less abundant, extending 

 from the latter part of June to the last of August. 



A delay in the printing of these papers enables me to add 

 to the manuscript as above prepared, a comparison made by 

 Dr. Speyer, at my request, of C. fidicularia with the Euro- 

 pean species. He writes as follows : 



