8 14 Journal of Agricultural Research voi.xx.No.ii 



The other Rudbeckia feeder (Isophrictis similiella Chambers) belongs 

 to the same family as the pink bollworm and is much more abundant and 

 less local than the olethreutid. It feeds on the seeds of a number of 

 Compositae and is frequently found in sunflower heads. The larva when 

 mature often has a pinkish tinge and somewhat resembles an immature 

 pink bollworm except for its shape, which is distinctly spindle-like, 

 sharply tapering at both ends and decidedly stout for its length (1.5 to 2 

 mm. wide by 5 mm. long in full-grown specimens). The arrangement of 

 the setae of the anterior group on the epicranium is also characteristic; 

 A 1 , A 2 , and A 3 are crowded very close together on the anterior dorsal part 

 of the head and L 1 , while remote from A 3 as in most Gelechiidae, is well 

 forward near the ocelli. (Pi. 102, F.) 



The pupa shows under the microscope a slight pubescence similar to 

 that of Pectinophora gossypiella but this is limited to the head alone. 

 Otherwise, except for the normal seta and a sharp, thorn-like, dor sally 

 projecting cremaster, the pupa is smooth. It is short and moderately 

 stout (1.5 mm. broad by 5.5 to 6 mm. long) with the wing cases reaching 

 nearly to and the metathoracic legs extending a trifle beyond the tip 

 of the abdomen. 



Several moths of this species were reared from larvae collected at 

 various points in Chambers County and in the neighborhood 01 Galveston 

 and Houston. Larvae were collected in late August and early September, 

 1918, and adults issued from these from the middle to the end of Septem- 

 ber the same year. Other larvae, taken in October of 191 8, produced 

 moths the following May, passing the winter as pupae within the dried 

 flower heads. 



The male genitalia of the moth are figured in Plate 95, A. 



FAMILY OECOPHORIDAE 



BORKHAUSENIA DIVENI, N. SP. 



(PL. 96, C-F) 



Borkhausenia diveni, n. sp. 



Antennae white, faintly annulated with fuscous above. Palpi blackish fuscous, 

 broadly banded at base and apex of third joint with white; inner sides somewhat 

 dusted with white scales. Face white. Head white with a slight suffusion of fuscous 

 at vertex. Thorax white, heavily dusted with blackish fuscous; tegulae white, basal 

 half blackish fuscous. Forewings white, suffused and mottled with pale brown and 

 black scales, the brown suffusion obscuring most of the ground color at the base and 

 beyond the middle of the wing; an irregular black spot at base of costa; a similar black 

 spot on lower vein of cell close to base ; above and below it two smaller black spots; 

 at middle of wing a straight, rather broad, vertical fascia of blackish brown scales 

 inwardly margined by a distinct line of the white ground color; in the middle of this 

 fascia a round spot of distinctly paler brown scales with the black scales edging it 

 slightly raised ; on costa just beyond median fascia a poorly defined triangular patch 

 of brown and blackish scales; a small black dot at upper outer angle of cell and several 

 small obscure dark spots near tornus; cilia dirty white. Hindwingsand cilia grayish 



