20 



edge excavated on anterior half, with a blackish orbicular dot in ex- 

 cavation before middle; a terminal series of dark fuscous or blackish 

 dots; cilia fuscous, with darker subbasal line. Hindwings rather dark 

 fuscous; an obscurely paler slightly sinuate postmedian line, anteriorly 

 darker-edged; cilia as in forewings." [Meyrick, Fauna Hawaiiensis, I, 

 Pt. II, p. 203, 1899.] 



This species is not eoiiinion, except very locally, on account of 

 the (listrilmtion of its food-plant. The caterpillans liave been 

 found on only one species of plant, Silver Sword ( Astelia vera- 

 troides) , one of the few native species of Liliaceous plants. The 

 plant grows on exposed ridges or slopes at elevations of 2000 to 

 6000 feet; often very abundant. So far, this luoth and its 

 caterpillars have been collected only at Kilauea, Hawaii. I liave 

 found the catterpillars very numerous, but failed to rear more 

 than a single pair to maturity. Dr. Perkins has also bred a male 

 and a female from caterpillars from tlie same place. 



The caterpillars feed on the inner leaves at the crown of the 

 plant, and l)etween leaves where tluy are close togetln'r. Wdien 

 small, they arc much hidden bj- the <lense woolly material which 

 covers the surface of the leaves, especially when young. They 

 eat one surface and the mesophyll of the leaf, leaving the opp(»site 

 epidermis. 



Caterpillar.— (Plate 111, lig. 2). Length about 27 mm.; 

 rather slender; pale whitish green, the dorsal line lirownisli, 

 younger ones quite pale. Head similar t(; O. accepta, with the 

 ad<lition of black dot on postero-venti'al margin, and a brownish 

 dot above ocelli. Cervical shield has black lateral margins; two 

 black spots in lateral lobes, the anterior ones elongate, the 

 posterior ones round; two tiny dots neai' tlu' middle near antei'ior 

 margin; the tubercle in front of prothoracic spiracle has a little 

 black on ui)per margin; two brownish spots on each side between 

 segments 2 and .'>. Tubercle i of sc^gment o is a little blackened 

 on lower margin, and tubei'cle ii is heavily black-margined all 

 around except a little space on the u[)per side. Tubercles i and ii 

 of segments 11 and 12 are more or less faintl}' margined all 

 around, and tubercle iii of segment 12 is more heavily margine(l 

 on upi^er side. Tubercles of some of the intermediate segments 

 often family margine<l. 



Pupa. — lo mm.; medium brown; wing-cases extending to 

 apex of 4th abdominal segment, leg- and anteima-cases extending 



