18 
DIPHTHERA; CHARADRA. By Dr. M. Dkaudt. 
propinqui- 
linea. 
infanta. 
acron yctoi- 
des. 
furcilla. 
portlandia. 
gigantea. 
virginaria. 
palata. 
pat a. 
nitens. 
jalapensis. 
the submedian fold connected with the posterior one by a black streak; the white ring-macula is pupilled black; 
hindwing diaphanous blackish with black and white speckled fringes. Expanse of wings: 38 to 40 mm. Canada. 
C. propinquilinea Grt. (2 a) has uni-coloured greyish-white forewings dusted with brown and quite 
similarly marked as the preceding, but the transverse stripes never connected, hind wings white dusted with 
brown, towards the margin darker with whitish marginal streaks. ■— Larva entirely like that of the European 
C. coryli L. and likewise living on various foliage-trees. United States, May to July. 
C. infanta Smith resembles propinquilinea, but it is somewhat smaller and with darker brownish-grev 
forewings; the small white ring-macula without a pupil. Hindwing blackish-brown. Expanse of wings: 37 to 
42 mm. United States. 
2. Genus : Df|»hthcra Tr. 
Very much like the preceding genus, chiefly only different by the second subcostal vein of the forewing 
rising from the cell, and by a very long, narrow accessory cell which is very small in Colocasia, whilst the said 
subcostal vein is forked with the others. Half a dozen of North American species, two others being palearctic 
or East Asiatic respectively. In the American catalogues most of the species are to be found among the Panthea. 
D. acronyctoides Wkr. (= leucomelana Morr., cucomelana Smith) (2 a) is the smallest species with 
the lightest forewings, almost purely white with a faint yellowish tint and distinct, black, dentate transverse 
lines and a punctiform ring-macula, recognizable by the median line forming a distal tooth on the median 
vein; the space between the median line and the posterior transverse line is mostly much darker. Canada, 
United States; in June. 
D. furcilla Pack. (2 a) is whitish-grey, very variable by more or less brownish dusting with a rather 
distinct, white, dentate antemarginal line and an almost straight, black, anterior transverse line, the median 
line being almost straight, too; no maculae at all. Fringes speckled brown with white. Canada, United States; 
June to August. — Larva reddish with whitish dorsal and lateral stripes, tubercles orange, red, in front more 
yellow-haired, with black hair-pencils on the 1st, 2nd, 4th, and 11th rings. It lives on Larix and Pinus in August 
and September. 
D. portlandia Grt. (2 a) is much larger than furcilla, the white ground-colour is more prominent 
on the forewings and the anterior transverse line is not straight but sinuately dentate; the median line is also 
somewhat undulate, in the cell before it a dark streak, all the lines more blurred, not so distinct, the maculae 
are present. Canada, United States. 
D. gigantea French (2 a) is a very large, strong species strewn with dark brownish-grey on the fore¬ 
wings, the transverse lines being rather straight, the white antemarginal dentate line blurred, the reniform 
macula absent or present. Colorado, Texas. 
D. virginaria Grt. (2 b) is still larger and darker, the veins marked darker, ring-macula and reniform 
macula present. Described from California. 
D. palata Grt. (2 b) in its exterior is more like a Charadra ; smaller than the preceding with entirely 
white hind wings; on the forewing the median line is broad, faded, and it darkens the space between the maculae; 
the anterior and posterior transverse lines are connected by a black longitudinal streak on the submedian fold; 
the dark, distally white antemarginal line is not dentate, but only somewhat undulate. The species flies in 
Colorado and Arizona. 
3. Genus: dtararirn Wkr. 
Discernible from the preceding genera by the well developed proboscis; the metathorax exhibits a 
hair-tuft; the abdominal tufts are particularly large on the dorsum of the middle rings. In the veins no difference. 
The genus only contains American species proceeding to the south as far as Mexico and Costa Rica. 
Ch, pata Drc. (2 b) is at once discernible from all the other species by the yellow hindwings being 
bordered with blackish-brown. From Arizona through Mexico to Guatemala. 
Ch. nitens Sc-haus (2 b) from Costa Rica is quite similarly marked on the forewing, with intensely 
lustrous silvery scales in an oblique light, the space as far as the reniform macula in the costal part darkened 
by a brownish grey, behind it a conspicuous whitish spot; hindwings brownish-grey. From Mexico I received 
by the name of jalapensis form. nov. (2 c) — 1 am unable at present to find out the author’s name — numbers 
of a very large form more intensely darkened by a blackish grey, in which the light postmedian spot is scarcely 
noticeable; hindwing also quite blackish-grey. The species is presumably only a form of deridens Guen. 
