October, '16] MCGREGOR: BUCCULATRIX THURBERIELLA 505 



meeting. The first convention has been satisfactorj- and well worth 

 while. All members should work for the parent branch. This new 

 organization means much not realized before, including the Journal 

 OF Economic Entomology, the opportunity to present papers and to 

 meet other workers in this important field of scientific work. 



The convention is adjourned. 



The following paper was received too late for the meeting and is 

 presented for publication in the proceedings for which it was intended. 



BUCCULATRIX THURBERIELLA, A PEST OF COTTON IN 

 THE IMPERIAL VALLEY^ 



Bj' E. A. INIcGregor, Bureau of Entomology, U. S. De-partment of Agriculture 



On the first of June of the present year a species of tineid larva 

 was found devouring the leaves of cotton in certain fields near El 

 Centro in the Imperial Valley of California. Reared adults were 

 determined by Mr. W. D. Pierce of the Bureau of Entomology as 

 Bucculatrix thurheriella Busck, a species which was collected in the 

 summer of 1913 by Mr. Pierce on wild cotton (Thurberia thespesoides) 

 at various points in Arizona. 



Description 



Adult. — Busck's description- of the adult is as follows: "Face tuft, head and 

 thorax white. Antennae white with dark fuscous annulations. Forewings white; 

 extreme costal edge blackish; an outwardly black streak beyond the middle of costa 

 is continued as a very fine, easily lost line across the wing to a group of black scales 

 below apex, where the cilia is also dotted with black; a few easily lost black scales on 

 basal third of dorsum and a group of black scales on the middle of dorsum is fol- 

 lowed by scattered light brown scales. The apical part of the wing above the oblique 

 costal streak is dusted with brown and black scales. Cilia ochreous white. Hind 

 wing and cilia ochreous white. Legs white on the inner side, black exteriorly; tarsi 

 black with narrow white annulations. Alar expanse 7 to 8 mm." 



Larva. — Concerning the larva Busck merely states that it "is dirty white, rough 

 skinned, with prominent white tubercles and with two dorsal rows of black dots, one 

 on each segment. Head light ochreous with black eyespots and reddish-brown mouth 

 parts." 



In life the larva is rather of a greenish-amber color. Each segment, viewed dor- 

 sally, exhibits the following characteristics; a pair of large black spots at the anterior 

 margin; a transverse row of 6 whitish tubercles situated just behind the black spots 

 and extending from side to side ; a second transverse row of similar tubercles midway 

 between the former and the hind margin — all tubercles giving rise to a short bristle. 

 Eighth segment from the head nearly obscured by a dusky area. Thoracic legs 

 blackish. Head light ochreous with black eyespots and posterio-dorsal area of 

 dusky color. 



' Published by permission of the Chief of the U. S. Bureau of Entomology. 

 2 Proc. Ent. Soc. of Wash., vol. XVI, no. 1, March 1914, p. 30. 



