32 U.S. NATIONAL MUSEUM BULLETIN 244 



Ann. Soc. Suisse Zool. Mus. Hist. Nat. Geneve, vol. 63, fasc. 3, no. 27, pp. 

 451-555, 1956.— Forster and Wohlfahrt, Schmett. Mitteleur., vol. 3, p. 193, 

 1960. 



Type of genus. — (Psyche) dathrella Fischer V. Roslerstamm, 1834. 

 Designated by Tutt, 1900. 



Male. — Head with rough bristly hairs; palpi reduced, consisting 

 of two short segments barely extending from beneath head. Antennae 

 simple, ciliated. Foretibia very short, without epiphysis in majority 

 of species; present in few species. Middle tibia slightly longer than 

 that of forelegs, with pair of apical spurs. Hindtibia greatly length- 

 ened, with paired median and apical spurs. 



Wings (fig. 149) relatively long and slender; fully scaled. Forewing 

 with 11 veins; all veins normally separate with exception of R3 and II4, 

 which are completely fused; accessory cell usually present; base of 

 media always preserved, rarely divided within discal cell (of both 

 wings) forming intercalary cell; base of lA present, parallel to 2A+3A, 

 but gradually disappearing farther out; 2A and 3A uniting near base, 

 continuing as fused vein to margin. Secondaries usually with 6 veins 

 (in one European species only 5 veins present, owing to complete 

 fusion of M2 and M3); Sc+Ri and Rs more or less parallel throughout 

 length with no crossvein present; M2 and M3 either separate or 

 variously stalked. 



Male genitalia. — Tegumen broad, hood-shaped, with shallow 

 notch at apex. Vinculum somewhat broadened ventrally; saccus 

 undeveloped. Valves broadened basally with prominent spinelike 

 process midway along lower margin, sloping abruptly to much nar- 

 rower distal half. Anellus undeveloped. Aedeagus curved, with base 

 forked, sending short process caudad, diverging slightly from aedeagus. 

 Eighth sternite (fig. 188) simple, without f ureal arms; much smaller 

 than eighth tergite (fig. 188a). 



Female. — Palpi very reduced, 1-segmented. Antennae varying 

 in length and segmentation depending on species; either long with 

 12-26 segments, or short with 3-9 segments. Legs short but all 

 segments present. Foretibia unarmed; armature of meso- and meta- 

 thoracic tibia variable, with either 1-2 apical spurs or spurs absent. 

 Tarsi 3-5 segmented. 



Forewings represented only by minute flaplike vestiges. Hind- 

 wings smaller, almost completely absent. 



Female genitalia. — (Fig. 296.) Eighth and ninth abdominal 

 segments long and very protrusible, with three pairs of apophyses; 

 first pair weakly developed, short, entirely within last abdominal 

 segment; second pair longest, originating in last segment, extending 

 usually far forward into abdomen; third pair long, originating in 

 eighth segment often at level of ostium. Curved, transverse bar 



