70 



mined by the larvae of a Lithocolletis, observing as a fact he had noticed, tbat Lithocol- 

 letis larvae feeding on the leaves of deciduous trees, passed before the winter into the 

 pupa state, but in evergreens, they remained larvae until the spring. 



Mr. W. W. Saunders read a memoir ' Upon the Insects injurious to the Cotton 

 Plant,' of which the following is an abstract. 



" Having had my attention called to the insects injurious to the cotton-plant, I 

 have been seeking for information from a variety of sources, but discover with sur- 

 prise that the insects in question have been but very little studied, although it is evi- 

 dent from the published accounts of their ravages, the amount of loss to the planter 

 must at times be very great. The particulars which have hitherto appeared regarding 

 the cotton-moth, cut-worm or grub, cotton-bug, Apate monochus or bore-worm, will 

 be found in Porter's ' Tropical Agriculturist,' and Dr. Ure's ' History of the Cotton 

 Manufacture,' but the information is very unsatisfactory, and entirely wanting in that 

 correctness of detail so necessary to the entomological enquirer, and which if fully de- 

 veloped might lead to some satisfactory method of diminishing if not preventing the 

 injuries caused by these destructive insects. 



" More positive information is to be obtained on the following insects, and in treat- 

 ing on these I will place them in two divisions. 



" The first, containing the species which have already been described ; and the 

 second, such only as are for the first time brought forward as injurious to the cotton- 

 plant. 



" In the first division may be mentioned, 



"Phal^ena oblinita, Abbot and Smith's Insects of Georgia, PI. 94, p. 187. 

 "The caterpillar feeds on the cotton and other plants, and the moth apppears in 



April. 

 " Found in Virginia and Georgia. 



" Depressaria Gossypiella, Ent. Trans., vol. iii. p. 284. 



"Very destructive to the American cotton grown at Broach, in the East Indies, but 

 seldom affecting the native cotton. The larva feeds on the cotton-seed until 

 the pod is about to burst. 



" In the second divisiou I have to enumerate, 



" Arctia Horsfieldii. 



" Expansion of the wings 1 inch 10 lines. Anterior wings purplish ashy gray, with 

 several abbreviated, obsolete, wavy, dark gray strigae, parallel to the hinder 

 margin, and a more defined zigzag, dark gray line near the base, and with an 

 elongate reniform mark on the disk beyond the middle : posterior wings brown- 

 ish orange, gradually changing to purplish gray, marked on the disk with a 

 dark gray spot, and with radiating lines of the same colour. 



" The larva is yellowish white, covered with long cream-coloured hairs. The joints 

 of the body, each crossed above with an ash-gray lunulate spot, and a round, 

 rather large black spot on the upper side of the third joint. 



" Feeds on the Gossjpium herbaceum, Lin. ; a native of Java ; appears in the month 

 of August, according to Dr. Horsfield. 



