MAY, 1860. 133 



The larva may be taken in July ; the imago appears early 

 in August, and may be taken on the wing at this time in the 

 neighbourhood of the food plant of the larva. 



ELACHISTA, Treitschke. 



I would beg here to call the student's attention to the fact, 

 that the genus described in Paper No. 3, January, 1860, 

 under the name Cosmiotes* is the same as the present one. 

 I much regret the existence of this error; it is not, however, 

 necessary to state how I came to be misled. 



Median vein of hind-wings two-branched. Apical vein of 

 fore-wings with a branch from its middle to the costa, 

 bifid at the tip ; median vein two-branched. 



E. prcematurella. Head, face and labial palpi grayish- 

 fuscous. Antennas rather dark fuscous. Fore-wings fuscous, 

 with a purplish hue. Rather behind the middle of the wing 

 is a white band, silvery-hued, and near the tip a costal and 

 opposite dorsal spot of the same hue. Extreme apex of the 

 wing white, with a row of dark-brown atoms in the cilia, 

 which are fuscous. Hind-wings bluish-gray, cilia fuscous, 

 with a reddish hue. 



The imago may be taken on the wing early in April. 



BRENTHIA. 



Fore-wings almost cuneiform, rounded behind. The 

 subcostal nervure sends a vein to the costa from the middle 

 of the cell, and subdivides into two branches at the point of 

 junction with the discoidal nervure; arising from this are 

 \five veins to the hinder margin, and the median nervure sub- 

 divides into two branches at its tip. The subcostal f is fur- 

 cate at the base. The hind-wings are broad, irregularly 



See ante, p. 97. H. T. S. 



\ "Submedian" is probably here intended. H. T. S. 



