30 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



TWO MICROLEPIDOPTERA ON THURBERIA THESPESIOIDES. 



BY AUGUST BUSCK, Bureau of Entomology. 



Dichomeris deflecta Busck, Proc. Ent. Soc. Wash., vol. xi, p. 91, 1909. 



This peculiar species was described from a single specimen from 

 Arizona. The very long, porrected, compressed palpi with the 

 short, deflected terminal joint are unlike those of any other species 

 in the genus, but this is a difference of degree rather than of kind. 

 The species is otherwise typical of the genus Dichomeris and is 

 properly included therein. 



The larva is a leaf-folder on Thurberia thespesioides and was bred 

 by Mr. W. D. Pierce, at Santa Catalina Mountains, Arizona. 

 The imago issued August 24, 1913. The following is a descrip- 

 tion of the larva. 



Head and first thoracic segment dark reddish brown; eyes and mouth 

 parts black; anal plate large, black, with long black bristles. Remainder of 

 the body white, with four straight, longitudinal rows of large, round, black 

 tubercles, two dorsal and two lateral. There are two such tubercles on each 

 segment in each row, and on account of their size, they are nearly confluent 

 longitudinally. Between these rows of tubercles run a central and two 

 lateral, thin, purplish, longitudinal lines. Below the lateral rows of tu- 

 bercles each abdominal segment has two more, smaller, oval, brown tuber- 

 cles, set obliquely. Each tubercle bears a single long, light colored hair. 

 Thoracic feet black, prolegs white, each with an anterior and a posterior 

 row of long brown hooks. 



Bucculatrix thurberiella n. sp. 



Face tuft, head and thorax white. Antennae white with dark fuscous 

 annulations. Forewings white; extreme costal edge blackish; an outward- 

 ly 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 dor- 

 sum and a group of black scales on the middle of dorsum is followed by scat- 

 tered 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. 



Habitat: Santa Catalina Mountains, Arizona. 

 Type: No. 16699, U. S. N. M. 



Bred by Mr. Pierce from Thurberia thespesioides, in August and 

 September. 



The larva is dirty white, rough skinned, with prominent, white 



