46 Journal New York Entomological Society, t^'"'- x.wiii. 



number ranges from one or two to as many as thirty or more. Some- 

 times the entire pith of the stem is taken up by them and each cell 

 contains a larva. Only in rare cases have two been noted in a single 

 cell. Cells varied in length from 9 to 30 mm., in the same stem and 

 the width was 3.5 mm., this being the width of the pith. The width 

 of the cells depends on the diameter of the pith as they are never 

 found in the woody part. In one or two cases cells were found 

 which occupied only one half of the diameter of the pith. The cells 

 in side shoots are usually long because the diameters of such shoots 

 are small and those of the pith comparatively smaller. Each cell 

 consists of a cavity in the pith which is plugged at each end with 

 what appears to consist of dark excrement-like material, in layers, 

 closely packed together, each layer being intermixed with threads. 

 The cell is usually but not always lined inside with a thin layer of 

 silk. 



The yellowish larvse in the stems varied considerably in size, some 

 being rather small, but most of them appeared to be full grown or 

 nearly so. Central stems, three and one half high, were found to 

 contain larvee as follows: 2, i, 6, 2, 2, 3. Stems from four to five 

 feet high housed the following: 4, 9, 5, 4, 3, 3, 4, 7, I, 7, 14, 20, 10, 8, 

 18, II, 8, 12, 16, 4, 9, 5, 8. In a few instances stems six feet long 

 contained as many as thirty or more. 



During April and May the larva spins a rather loose and roomy 

 cocoon which fills a considerable portion of a small cell. After this 

 is completed the larva cuts a circular hole through the wall of the 

 upper part of the cell, usually close to the roof, almost to the out- 

 side, leaving only the thin epidermis which is found on the outside 

 of the stem. The large, loose, roomy cocoon connects with this cir- 

 cular hole. After this the larva spins a compact, white, elongate 

 cocoon in which it transforms, this cocoon also connecting at its 

 upper end with the circular opening through the cell wall. These 

 cocoons are usually placed more or less diagonally in the cells and 

 are anchored to the large, loose cocoon by threads. Sometimes, 

 however, the larger cocoon is absent. 



Pupation takes place during the last of May and continues until 

 the middle of June and in the central part of the state, the first moths 

 emerged on June 4. In the northern part, however, pupation and 

 emergence take place later. In fact, pupation and emergence take 



