NOVEMBER, 1861. 163 



larvae, one must use a pot of moistened sand, in which the 

 food plant is placed, covered with a glass cylinder, with fine 

 gauze tied over the top ; or the plant may be kept in water 

 and covered with a cylinder of glass. For this purpose old 

 chimney tops to lamps answer very well. The larvae of this 

 genus, taken in the fall of the year, hybernate in their cases 

 until the following spring, and " feed up" on the first leaves 

 that put forth. They must not, therefore, be kept in a 

 warmed room during the winter. The pupae of the fall 

 brood of larvae thrive much better, likewise, if not kept in 

 a warm room during the cold months. The spring or early 

 summer brood of larvae produce imagos in a few weeks after 

 entering the pupa state, and hence it is much more satis- 

 factory to collect early in the year than during the latter 

 part. 



For convenience of reference, I append a table of months, 

 designating the species included in this paper and their food 

 plants, and intended to show when they should be looked for 

 by the collector. 



I shall be glad to hear from anyone who may find any of 

 the larvae and is successful in rearing the imago. At the 

 same time he might communicate the fact to the Entomo- 

 logical Society for publication in their Proceedings, accom- 

 panied with a description of the imago and any observations 

 on its natural history he may deem interesting or important. 

 In the course of time, such a system would make the Journal 

 an entomological necessity and provide a pleasant and in- 

 structive channel of communication between American Ento- 

 mologists. 



A CALENDAR SHOWING WHEN THE FOLLOWING 



SHOULD BE SOUGHT. 

 MAY. 



Coleophora tilicefoliella. Early to end. Leaves of bass- 

 wood, T. Americana. 



M2 



