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CIRRODLSTTS; BISTICA; CHRYSOEOIA; POLENTA. By Dr. M. Draudt. 
bcnedicla. 
noela. 
scira. 
benjamini. 
(jladxola. 
requies. 
tepperi. 
162. Genus: Cirrodlstis Dyar. 
Proboscis developed, the rounded frontal projection exhibits a shovel-shaped appendage in the centre 
and below it a horny plate with pointed ends. Thorax clad with hair-like scales, without tufts. Forewing with 
an almost falciform apex, at the distal margin with two considerable excisions, in the middle betewen them 
with a projection. Bnt one species: 
C. benedicta Dycir (45 e). Forewing yellow with a brown basal area, a feeble median line and a narrow 
double postmedian line approaching the distal margin. Hindwing yellowish with a dark median line and a 
distally dentate postmedian shadow. Under surface very variegated, marked with brown. Mexico (Zacualpan). 
163. Genus: Bistica Dyar. 
This genus contains but one peculiar small species which may be identical with Mychonia noela described 
by Druce as a Geometrid, for which reason Dyar cautiously chose the same name for the species. It is not 
dissimilar to the preceding species, from which it differs in the truncated conical frontal projection with a raised 
margin and central apex; metathorax and abdomen each exhibit one small tuft. The forewing of the small 
slim species has a rather deep excision below the apex. 
B. noela Dyar ( Drc.l ) (45 e). Forewing ochreous-yellow, in the basal area bronze gold, bordered 
with brown, with fine brown transverse lines, behind the anterior line in the lower half a golden area, behind 
it a broad postmedian shadow and a cellular spot. Hindwing grey. Mexico (Tehuacan). 
164. Genus: Chrysoecia Hmps. 
A genus of a somewhat doubtful position, but best ranged here; the frontal projection is apparently 
not constant; Hampson mentions a rounded projection with a vertically placed median listel, whilst North 
American and Mexican specimens of scira show a strong truncated conical central projection which is above 
deeply hollowed out, beneath it a transverse listel; in requies the transverse listel is strongly developed. The 
thorax is composed of a mixture of hairs and scales, behind with a flat tuft, the abdomen is tuftless. The 
anterior tibiae exhibit a feeble spine on the outside. The middle radial branch is so feeble that 1 also range 
here requies having been placed to Protarache (Erastrianae ) by Hampson. 
C. scira Drc. (45 f). Forewing reddish-yellow, in the median area powdered with dark brown, in the 
marginal area yellowish-white, the transverse lines strewn with silvery bine; the maculae are olive-yellowish, 
centred with silvery blue. Hindwing blackish-brown with white ends of the fringes. Mexico, recently also 
found in Arizona, here in a much smaller form, with an expanse of only 28 to 30 mm, whilst in Mexico it attains 
36 mm. For the Arizona-form the name: benjamini Hill, may be used. 
C. gladiola Barnes (45 f) is a not dissimilar but much smaller species, distinguished by a large oval 
yellowish-white spot in the disc. The colouring and marking are otherwise very similar. Arizona. 
C. requies Dyar (45 f) is very similar and easily discernible by the much smaller yellowish-white disc-al 
spot showing more the shape of a horizontal crescent and with an upward concavity. Mexico (Zacualpan). 
165. Genus: Polenta Morr. 
Very closely allied to the preceding genus and distinguished by the cordiform frontal projection with 
a raised edge which at its lower end is prolonged into a point. The thorax is chiefly clad with scales and exhibits 
behind a loose tuft; all the rest corresponds with the preceding genus, also the tibial spines. But one species: 
P. tepperi Morr. (= richii Grt.) (45 f). The whitish forewing is densely powdered with olive-brown, 
the straight transverse lines are white, behind the distal line there is at the costal margin a dark olive-brown 
triangular spot. Hindwing light brown. Colorado, Texas, Arizona. 
