ARCTIIDAE AND CTENUCHIDAE FORMERLY IN AUTOMOLIS 61 



tarsus. Coloration of metathoracic leg as mesothoracic leg; two pairs of tibial spurs present. 

 Forewing venation as in Text-fig. 17. Upper surface of forewing orange-yellow; small white 

 patch of apically bifurcate, white scales at base of wing; medial marking brown and weakly 

 iridescent brownish grey at distal end of cell and proximally at anal margin of wing (this marking 

 highly variable; weakly marked, as in type, enclosing large orange-yellow patch at anal 

 margin; or strongly marked with small orange-yellow enclosure). Hindwing venation as in 

 Text-fig. 18. Upper surface of hindwing yellowish white or pale yellow, most intensely coloured 

 at anal margin; with terminal band of brownish grey (except 1 $ from Bolivia); or in some 

 specimens (not type) whole of hindwing brownish grey except for narrow anal band and apical 

 area; patch of lanceolate, androconial scales present in cell, surrounded by unsealed zone. Under 

 surface of both wings as for upper surface but colours less intense. Under surface of forewing 

 with large area of androconial scales (similar in shape to androconial scales on hindwing) 

 extending from just posterior to cell to anal margin (the area of overlap between fore- and 

 hindwings). Abdomen orange-yellow, with brown dorsally on segments 1-5 (darkest posteriorly) 

 in some specimens (probably not type, judging from remains of first segment). 



§ (two examples). As $, except that forewing medial marking encloses small brownish 

 yellow patch at anal margin and that hindwing is greyish brown except for orange-yellow anal 

 band and apical area. 



Forewing length: lectotype £ 14-0 mm; <$ 14-0— 15-0 mm; $ 14-0 mm. 



$ genitalia. Valve with small, dorsomedially-directed process near apex; juxta scobinate, 

 globose anteriorly; uncus bifid, apex of each arm acuminate and hood-like; vesica with single, 

 multispinose cornutus near apex of aedeagus, 3 or 4 robust, thorn-like cornuti and two scobinate 

 zones. 



$ genitalia. Corpus bursae divided into anterior lobe bearing two invaginate, scobinate 

 signa and minutely spinose posterior lobe; ostium protected ventrally by 7th abdominal 

 sternite; scent-tubules simple and short. 



This species differs from its apparently close ally, pseudoflavescens , by the shape 

 of the dark, medial marking on the forewing (this encloses a yellow marking at the 

 anal margin of the wing and has its proximal margin at 45 degrees to the longitudinal 

 axis of the moth), and in the male genitalia by the longer valves, shorter valve 

 processes and the differently ornamented vesica. 



There is extensive individual variation in the coloration of both fore- and hind- 

 wings in flavescens. The dark medial marking on the forewing may be either uni- 

 colorous or much more intensely coloured at anal margin, while the size of the 

 enclosed yellow area and the degree to which the medial marking extends from 

 the tornus along the outer margin both vary considerably. The upper surface 



androconial area 

 (upper surface) 



androconial area 

 (under surface) 



Figs 17, 18. Regobarrosia flavescens, $, venation. 17, forewing; 18, hindwing. Scales 

 from the androconial patch on the hindwing are illustrated on PI. 30, fig. 187. 



