July, 1841.] 55 



No pupa) were observed by the collectors of these specimens 

 in the same plants, other than those of the common appearance 

 ascribed to Say's insect, and near the roots. None other were 

 found in the present straw, after a careful examination. 



Other remarks were made, on the probability of several ani- 

 mals, not all yet identified, infesting the wheat in Pennsylva- 

 nia; on the beauty, learning and careful preparation of Mr. E.C. 

 Herrick's recent memoir ; on some interesting observations of 

 that gentleman ; on the effects of climate in varying the kinds 

 and diversity of destructive insects ; and on the influence 

 exerted by the age of the plant over the selection of a point of 

 deposit for eggs. 



Dr. Coates in addition to a former verbal communication, 

 had observed the following. 



Larvae apparently similar to those above mentioned, in 

 Blockley. 



A body nearly the size of Say's pupa, of a pure, homo- 

 geneous straw colour, immersed in a depression of the 

 straw, beneath a pupa of the appearance of Say's, and 

 having, lower down than either of them, a round perfora- 

 tion extending into the hollow of the straw, with this cavity 

 eroded on the inside ; all from the third joint. This body 

 subsequently assumed markings, having the appearance of 

 the separation of a head, cases for antennae, and other 

 organization. Though this appearance of development took 

 place, and the subject was kept from June 23d to July 9th, no 

 fly had as yet been produced. 



A very active larva, supposed to be of a lepidopterous ani- 

 mal, ll-20ths of an inch long, colour reddish black, with three 

 yellow streaks throughout its whole length, three anterior feet 

 clawed, and it is believed some of the posterior ; the animal 

 imperfectly observed from a wish to leave it but little disturbed. 

 Found in Blockley, June 23d, in the hollow of a wheat straw; 

 a round hole through which it could have entered, penetrating 

 the cell in which it was feeding, and also the leaf-sheath with- 



