44 PROCEEDINGS OF THE NATIONAL MUSEUM vol. oo 



Hind wing as wide as or wider than fore wing, with costa nearly 

 straight, termen evenly rounded; 8 veins; 3 and 4 connate or short- 

 stalked; 5 curved, approximate to 4; 6 and 7 subparallel. Abdomen 

 flattened. 



Male genitalia. — Harpe ample; clasper present, simple. Anellus 

 without well developed fingerlike processes. Vesica with or without 

 cornuti. Socii fleshy. Uncus reduced or lacking. 



Female genitalia. — Bursa copulatrix with or without signum ; ductus 

 bursae membranous throughout (except fuVva). 



Larva. — Ninth abdominal segment with setae I and II well separated 

 (I as near or nearer to III than to II) : seta VI not on a single pinacu- 

 lum with IV and V but not approximate to VII. Setal group VII 

 bisetose on first and seventh abdominal segments, unisetose on eighth 

 and ninth abdominal segments, normal (trisetose) on proleg-bearing 

 abdominal segments. Ocelli normal. Submentum without sclerotized 

 pit. 



Pupa. — Pubescent. Prothoracic femora and labial palpi not 

 exposed. Cremaster absent. 



Remarks. — Agonopterix is a valid genus readily separable from 

 Depressaria^ with which Meyrick and others continue to synonymize 

 it, and from Apach£a. The stalking of veins 2 and 3 of the fore wing 

 in Agonopterix is constant and is associated with the absence of the 

 long lateral processes of the anellus so frequently encountered in 

 Depressaria and other oecophorid genera. The pattern of the fore 

 wings of Agonopterix always differs from that of Deprcssaria by en- 

 tirely lacking conspicuous longitudinal streaks such as are found in 

 the latter genus. 



The moths of this genus, with the exception of one small group, 

 form an extremely compact assemblage of species, often difficult to 

 separate. The male genitalia are strikingl}'^ similar, species being 

 best separated on characters of the anellus, clasper, and aedeagus. 

 The anellus seems to be the most stable of the three and may suffice 

 for separation of species where the other two fail. The length of 

 the harpes {psoraliella and others) and the shape of the cucullus are 

 apt to vary considerably. (In preparing mounts of the genital 

 organs great care must be exercised to eliminate distortion and 

 shrinkage.) 



The remaining species of the genus all have fingerlike claspers, 

 small, numerous, few, or no cornuti on the vesica, and all the females 

 have a closely similar type of genitalia with or without a signum. 

 The wing form varies from moderately narrow to broad, and the 

 palpus has a well-developed brush on the second segment. There 

 are, however, in this last large group, sections that show divergence 



