THE CANADIAN ENTOMOLOGIST. 127 



G. crigcronella. 



G. plajitaginisella Cham. 



In one of the vols, of the Zoo. Rec. the Recorder has expressed some 

 surprise at my having changed the name of a species first described by 

 me because I had discovered its food plant. Nevertheless, the practice 

 is so general, and, in my opinion, it is in every way so convenient and 

 proper, to give to the Titieiiia specific names derived from the food plants 

 of the larvse, that I can not but think it best to adhere to it rather than 

 to an arbitrary rule of priority, especially where the name first given has 

 probably never been used except by the person who bestowed it, and 

 where the change is made by that person, and the first name is not only 

 inappropriate, but misleading, as it would be in this instance. It is not 

 necessary to explain how I was led into the error of supposing that this 

 species feeds on Plmitago instead of Erigeron. 



There is a Gracilaria larva which, when very young, makes a small 



mine in the upper surface of the leaves of the Hop hornbeam (Ostrya 



Virgiiiica), but I have never been able to have its subsequent history. 



Like some other larvae of this genus, when very young, it shows some 



resemblance to the flat group of larvae of the genus Lithocolletis. 



NOTES ON LARV^— FONDNESS FOR WATER— HINTS TO 



BEGINNERS. 



BY C. G. SIEWERS, NEWPORT, KY. 



Last spring, while collecting beetles under the bark of decayed logs, I 

 met with numbers of the larvae of Arctia isabella (hairs brown in the 

 middle, black at each end of larva,) about to spin up. Not knowing 

 their hybernating habits, they had always bafiled me, and under the 

 impression that they would require another season to mature, had been 

 turned loose. I collected some twenty, put them into a box with cotton 

 and paper scrap, and they at once spun up, all but four. These wandered 

 up and down for a w-eek, having some want, and wasting away. It 



