THE CANADIAN ENTOMOLOGIST. 107 



joint 4 forward, and from this point more rapidly backward ; head 

 rounded ; tongue and antennae case extending a little further back than 

 the wing cases. Color pale yellowish brown, faintly mottled with dark 

 reddish brown ; a double dorsal row, a pair to each joint, of dark brown 

 patches ; a lateral row of the same at the edge of the wing cases, on joints 

 2 to 5 j a single ventral row from joint 6 back, and smaller patches scat- 

 tered over the ventral surface. The wing, tongue and antennae cases are 

 darker, the ground color slightly darker and the mottlings thicker, so as 

 to be nearly uniform dark purplish brown. Duration of this period from 

 249 to 282 days. 



The eggs producing the larvse from which this description was taken 

 were obtained from Mr. C. F. McGlashan, Truckee, Cal. The eggs were 

 deposited June 19, 1885, hatching June 25. They began to spin leaves 

 together July 21st, the imagines, three in number, being produced March 

 27th, April 1 8th and 29th, 1886, respectively, giving pupal periods of 249, 

 271 and 282 days, or giving 286, 308 and 319 days from the time the 

 eggs were deposited to the perfect insects. There is a possibility that in 

 this latitude there would be a second brood with a short pupal period, but 

 probably in its home in the Sierras the imagines are produced much later 

 than here, and that there is only one brood. 



While in confinement they ate Missouri or Golden Currant (Ribes 

 Aureum). In pupating a few leaves were fastened together within which 

 was a button of silk to which the crenaster was fastened. 



NOTE ON CERTAIN SPECIES OF THE GENUS ARCTIA. 



BY A. R. GROTE, A. M., BREMEN, GERMANY. 



It is only comparatively recently that I have seen the article of Mr. 

 B. Neumoegen upon the genus Ardia and its variations, contained in 

 Papiho, vol. 3, p. 148. So far as my own experience and conclusions go, 

 I am, except in two instances which I nocice here, generally agreed with 

 the views of this writer. Especially am I of opinion that recently there 

 has been an unscientific and unsound attempt to class as one species 



