EXPLANATION OF THE PLATES. 



The drawings accompanying this paper were made under the author's super- 

 vision by Miss Eleanor Armstrong, Miss Ada F. Kneale, and Mr. Harry Brad- 

 ford, of the Bureau of Entomology. Miss Armstrong contributed the drawings 

 on Plate 1 (figs. 1 to 14). Figures 27, 28, and 32 and all those on Plate 59 are 

 by Mr, Bradford. The rest of the drawings were made by Miss Kneale. The 

 drawings of the male genitalia were all made to the same scale. The photo- 

 graphs of male genitalia were taken by Messrs. Blake and Stanhouse of the 

 photographic division of the United States Department of Agriculture and 

 Mr. Pratt of the Bureau of Entomologj'. All drawings and photographs of 

 male genitalia were made from slides prepared by the author. 

 Terms used in description of male genital organs : 



Ae=aedoeagus (outer chitinous sheath of penis). 

 J.n=anellus (entire chitinous structure supporting aedoeagus). 

 J.«o=arm-like part of anellus directly supporting aedoeagus. 

 J.sp=enlarged anal spine of cucullus. 

 -Bo=basal opening of harpe. 

 C'a=costa (costal margin of harpe). 

 C?= rudimentary clasper of harpe. 

 Cm.=costal membrane connecting harpe and vinculum, replacing in 



some forms the costal hook (Ts) of other species. 

 Cn.=cornuti (spines on penis proper). 

 Cs=cucullus of harpe. 

 Z)sp=spines arising from outer surface of harpe. 

 G»=gnathos. 

 -ffp=harpe. 

 J=juxta (basal plate of anellus). 

 ^=neck of harpe. 



P<»=pollex (digitate projection from anal angle of cucullus). 

 jSfc=sacculus of harpe. 

 8i= socii. 

 Tg=tegumen. 

 T5=costal hook of harpe (reduced basal element of a transtilla). 



I7=uncus. 

 Fm=vinculum. 



Fp=ventral plate of gnathos. 

 A y///s= modified sternite of eighth abdominal segment. 

 A"F///^=modified tergite of eighth abdominal segment. 



Plate 1. 



Wing and antennal characters in Olethreutidae. 

 Fig. 1. Hind wing venation of Olethreutes arcuella (Clerck). 



2. Hind wing venation of Carpocapsa pomonella (Linnaeus). 



3. Male antenna of Strepsicrates indentana (Dyar). 



273 



