HYPOPTA. By H. G. Dyar f. 
1275 
Ch. valdiviana Phil, is at once discernible from moorei in both sexes by the black hindwings. Forewing valdiviana. 
more pointed likewise in both sexes. Forewing of A profusely dusted black, that of the $ more resembling the 
forewing of moorei and only shaded blackisch in the median area. Chile. The larva likewise bores into willows. 
13. Genus: Hypopla Hhn. 
Veins 1 and lb of forewing separated, the discal Veins forked on both wings. Veins 7 9 of forewing 
stalked from the small areole, 10 from it, 11 remote from it from the discal cell. The cell on the hindwing is 
projecting, veins 5—7 arise from the same base, 8 free. 
Type: H. caestrum Hhn. 
H. nana Stkr. (181 c). The small grey species resembles a tiny Cossus cossus, shaded somewhat lighter nana. 
and darker and reticulated with black lines, especially in the disc and marginal area, 2 lines being particularly 
prominent, the interior one forked in the middle, a whitish spot in the triangular area formed thereby, the 
exterior line likewise forked, but only shortly below the apex; another whitish spot in the interior lower half 
of the median area. Only the $ is known. Texas. 
H. nina Schs. (183 c) has narrower wings and a very long abdomen; forewing simply grey with scanty nina. 
black striae. The frenulum in the $ is a long slender spine extending into a reverted fold of the subcosta of 
the fore wing. Costa Rica. 
H. connecta B. & McD. (181 i), described as Acossus , is presumably better ranged here; it recalls nana. conneda. 
Thorax light brownish, fore wing smoky brown in the basal half, lighter outside and dusted with silvery white; 
the black transverse striation forms two lines connected by a thicker longitudinal streak on the submedian half, 
the outer one bifurcating near the costal margin; faint reticular markings along the distal margin. Hindwing 
lighter, only with traces of reticular markings. Texas (San Benito). 
H. redtenbacheri Hammerschmidt (= agavis Blasq.. chilodora Dyar) (181 i). Forewing grey in different rcdtenba- 
shades, the striae marked by shades; costal margin rather broadly white, or at least striped whitish on two 
thirds; whitish scales bordered by black ones form 2 raised-looking transverse lines which may be increased 
to 4. Hindwing generally dark grey. Antennae of A bipectinate, of $ plain. $ frenulum as in nina. Mexico. 
The larva lives in the trunks of Agavae. 
H. engelhardti B. <£• Benj. This species and the following ones have been ranged in the genus Comadia cngdhardti. 
by their authoi's, but they belong to this genus here. Forewing whitish, strewn with black with a faded brownish 
shading below it, with a black median vein, the cell also often scaled black. Hindwing light, sometimes dusted 
blackish brown. Thorax broadly scaled. Expanse of wings: 31 —34 mm. Utah. 
H. dolli B. 6c Benj. shows the thorax more covered with hair-shaped scales, like the following species, doiii. 
too. Ground-colour of forewing yellowish white, strewn with blackish scales forming reticular markings; the 
veins indistinctly marked black, especially at the lower discocellular vein; the reticular markings may become 
very distinct, but they may also disappear nearly altogether. Hindwing grey. Expanse of wings: 28—35 mm. 
Nevada; Utah. 
H. subterminata B. <£• Benj. Forewing white, so densely scaled black that it appears dark grey, some subtermi- 
of the scales being confluent and forming reticular markings; a feeble band is formed subterminally in some 
specimens; the transverse vein is usually strongly scaled black. Hindwing blackish brown. Expanse of wings: 
37—49 mm. Arizona (Redington). 
H. stabilis B. 6- Benj. Ground-colour of forewing light, so much darkened by scattered black scales stabilis. 
that it appears grey; veins, especially the median vein, blackish, particularly at the lower discocellular vein, 
the subcostal area somewhat lighter than the rest of the wing. Hindwing dull blackish brown with darker veins. 
Expanse of wings: 35—37 mm. Utah. 
H. bertholdi Grt. (182 a). Silvery grey, shaded blackish brown with a blackish basal streak below the bertholdi. 
subcosta, the median vein also narrowly blackish, farther outside faded between the cell-branches. Fringe 
speckled dark. Hindwing grey. Colouring and marking most variable. Colorado, New Mexico, Utah. Cali¬ 
fornia, Arizona. - - fusca B. 6s Benj. is a form more intensely dusted brownish black, the marking also darker, fusca. 
Colorado. 
H. edwardi Neum.6- Dyar (= edwardsi Italia Torre ) may be merely a form of bertholdi. Body black, edwardi. 
antennae white with black pectinations. Forewing white, strewn with black, most densely so in the apical part 
and below the median vein and vein 2, whereas the cell remains lightest; some brownish faded shading between 
the bases of the veins 2—5. Hindwing brownish grey, fringe as on forewing white with brown ends. Expanse 
of wings: 40 mm. Only the type, 1 A from Colorado, is known. 
