March, 19^0.] DiCKERSON & WeISS : EVENING PrIMROSE InSECTS. 47 



place during all of June and the first half of July. However, the 

 moths which emerged on July 15 were in all probability stragglers 

 as the majority appeared during June. The first eggs were noted 

 on June 21,. Under laboratory conditions these were laid on the 

 upper leaf surfaces and hatched in about one week. In the field they 

 are probably deposited on the stems in addition to the leaves. After 

 hatching the larva; enter the stem tissue and feed, making longi- 

 tudinal cavities just under the bark and between the bark and pith. 

 At this time the larva is greenish and except for the head, which 

 is light brown, resembles the tissue in which it feeds. During the 

 last of July and first of August and before they are full grown, they 

 start to excavate the pith and construct a cell. By the time cool 

 weather arrives, all are in their completed, hibernation cells at which 

 time they are of a decidedly yellowish cblor. 



The following parasites of eloisclla can be noted: 

 Scambus inqnisitoriellus (Dalla Torre). Reared from larvae feeding 



externally on cloisella larvae. (Hymen. Conn., p. 321.) 

 Chcloniis laverncc Ash. Parasitic on Mompha eloisella (Smith, Ins. 

 N. J., p. 612). Also bred from cloisella larvc-e, Riverton, N. J., 

 June 12 (det. R. A. Cushman). 

 Eiirytoma sp. Emerged March 22, New Brunswick, N. J., from cells 



of eloisella. Numerous (det. R. A. Cushman). 

 Epiurus pterophori Ash. Emerged from cells of eloisclla collected 

 at Xew Brunswick and Morristown, N. J. Very abundant. Emerged 

 in laboratory from middle of ]\Iarch to middle of April. 

 Microbracon sp. from cloisella cells (det. Cushman). 

 Pimpla inquisitor Say. According to Weed in Insect Life (Vol. 3, 

 p. 275), the larva of this species is externally parasitic upon eloi- 

 sclla larvse. 

 At Lakehurst, X. J., on April 4, eloisella cells were collected 

 which contained numerous clusters of the mite Pcdiculoidcs rcntri- 

 cosits N. together with dried larval skins of cloisella. Later tlvie 

 mite made its appearance in our breeding cages and killed many of 

 the larv?c. (Mite det. by Dr. Nathan Banks.) 



Mompha stellella Eusck. 



This insect was described by Busck in 1906 (Canad. Ent., Vol. 38, 

 p. 123) from Pennsylvania and District of Columbia specimens and 



