58 U.S. NATIONAL MUSEUM BULLETIN 280 



Anerastia Iliibner 



Anerastia Hubner [1816H1826], p. 3G7. — Ragonot, 1901, pp. 394r-397. — Spuler, 

 1904, p. 200 — McDunnough, 1939, p. 36. [Type: Tinea lotella Hubner 

 [1810]-[June 20, 1813.] Designated by Moore, 1886, p. 357.] 



Prinanerastia Hampson, 1918, p. 80. [Type: Tinea lotella Hubner. Original 

 designation.] 



Diagnosis. — -Anerastia and two other North American genera 

 possess a toothed frons. In Coenochroa and Martia the teeth are borne 

 at the end of a well-developed protuberance; in Anerastia they form a 

 ring on an otherwise smooth frons. 



Description. — -Frons rounded, fine projecting serrations forming a 

 transverse elhptical ring about one-half as wide as frons, vesture short; 

 labial palpi deflexed, about 3)^ times eye length in male, about foiu- 

 times in female; maxillary palpi rudimentary, minute; tongue re- 

 duced; antennae compressed, male shaft with basal segments fused, 

 sublaminate, ciha about one-fifth segment width, female filiform, cilia 

 minute, each segment bearing on its distal haK several longer ciha, 

 each about one-half segment width; ocelli well developed. 



Fore wings mth 10 veins; Ri from well before upper outer angle of 

 cell; R2 free, just before the angle; R3 stalked for about one-half its 

 length onto R4; Mi from below the angle; M2+3 fused, well separated 

 from Cui; Cu2 from well before Cui at angle. Hindwing with 7 veins; 

 Sc and Rs approximate beyond cell, then diverging; IVIa and Cui 

 stalked for over one-half their length, from lower outer angle of cell; 

 Cu2 from just below the angle. 



Male genitaha with uncus bilobed, membranous medially. Gnathos 

 complex, medial process stout, subrectangular, posteriorly bearing 

 very short truncate lateral arms, mediodorsal process, and strong 

 anteroventrally directed hook, dorsoanteriorly with large curved 

 flat hook between uncus lobes. Transtilla crescent-shaped, poorly 

 developed. Juxta eUiptical, anterior margin sclerotized. Vinculum 

 broadly rounded. Valvae tapering on distal thu-d to bluntly pointed 

 apex of costa, anterior-facing crescent-shaped ridge near base of taper- 

 ing portion. Aedeagus Avith vesica bearing two large cornuti, one 

 lance-shaped, the other deeply bicuspidate. 



Female genitaha with ovipositor well sclerotized, tapering to bluntly 

 pointed tip. Dorsum of eighth abdominal segment deeply incised 

 medially. Apophyses well developed, anterior very shghtly shorter 

 than posterior. Ductus biu"sae moderate. Bursa unarmed. Ductus 

 seminahs from posterior end of biu-sa. 



Discussion. — This Old World genus is represented in North 

 America by lotella, a species common in Europe. 



