94 
CALOTHYSANIS; COSYMBIA. By L. B. Prottt. 
pink. — Egg elliptical, flattened, wedge-shaped, the larger end moderately truncate, the entire surface reti¬ 
culated and pitted. The larva has 5 instars; moderate, or rather stout, nearly cylindrical, head somewhat bilob- 
ed, held obliquely, free from and higher than the prothorax, tubercles and setae except in the first stage 
obsolete; ground-colour pale, heavily mottled with dark brown or blackish. Pupa suspended in a delicate net¬ 
work cocoon; amongst the few Geometrid pupae studied by Dr. Edna Mosher, it was considered to form a 
separate group, characterized particularly by having the “body with a long bifurcate projection at the cephalic 
end, densely covered with hooked setae”. The moth is continuously brooded and has a very wide distribution 
in the eastern United States, the warmer part of eastern Canada and westward at least to Colorado. 
14. Genus: Calothysanis Hbn. 
This genus, which belongs chiefly to Northern and Western Asia, with one well-known species extending 
into Europe, has been discussed in Vol. 4, p. 47, under the younger name of Timandra ; the reasons there given 
for rejecting Calothysanis were inadequate, inasmuch as Hubner’s name and diagnosis were founded entirely 
on amata and do not fit Scopula imitaria. The strongly pectinate <$ antenna, 4-spurred hindtibia, acute apex 
of forewing, tailed hindwing and generally the scheme of markings sufficiently characterize the genus. Only 
one species is known from the New World. 
umaturaria. C. amaturaria Walk. (11 i). Readily distinguishable from its Old-World relatives by the concavity of 
the anterior part of the distal margin of the forewing and the consequent angulation at the 3rd radial. Fringes 
and at times the distal margins darkened. — An aberration mentioned by Packard, with a broad brown shade 
effusaria. succeeding the extradiscal line, may be called, by analogy with that of G. amaia Linn., ab. effusaria 7iov. — 
Egg oval cylindrical, the surface coarsely pitted; whitish yellow when laid, changing within 24 hours to red. 
Larva on Polygonum, long and slender, in its later stages with a barrel-shaped expansion of the 1st and 2nd 
abdominal segments, the rest of the body marked with white, the ground-colour either light brown or blackish. 
Pupa light in colour, mottled and speckled, two pairs of tubercles at and between the bases of the antennae; 
spun in a few threads among herbage. The moth is common in the Eastern States of North America. 
15. Genus: Cosymfoia Hbn. 
Palpus shortish to moderate, the terminal joint, even in the $, not greatly elongate. Antenna of 
strongly bipectinate, of $ simple. Hindtibia of $ with 2 spurs, of $ with 4. Venation of forewing distinctive 
in that the first 4 subcostals are stalked well beyond the 5th, which arises at (or just before or behind) the 
apex of the moderate or rather small, undivided areole. Hindwing with 2nd subcostal not or very slightly 
stalked. Egg long-oval, with irregularly hexagonal reticulation. Larva nearly smooth, the head rather large, 
bilobed, the coloration variable. Pupa much like that of a butterfly, strongly attached by the tail to a leaf 
by silken threads, and with a silken girth between abdominal segments 2 and 3. The genus is chiefly Holarctic, 
with stragglers in South America. 
ijcndulinu- C. pendulinaria Guen. (= quadrannulata Walk., dilucidaria Rothke, lumenaria Hulst nec Hbn.) (11 i). 
Nearly related to the Palaearctic pendularia Cl. (Vol. 4, p. 142), slightly rounder-winged, the cell-rings rarely 
so sharply expressed, the median shade grey rather than rosy. Easily distinguished from the other American 
species by its whitish or cold grey colouring, almost entirely without brown or reddish tinge. The name-typical 
race, from eastern North America, is generally small and pale, especially, I think, in the 2nd brood. The types 
cited in the synonymy ( pendulinaria , “North America”; quadrannulata , New York; dilucidaria, Scranton, Pa.) 
uii/ricaria. are all closely similar; but dark examples, like the two following, occur with them. — ab. nigricaria Rothke 
(12 c), also from Scranton, has the upperside so densely irrorated throughout with black-grey that it may 
legitimately be called melanic, though the cell-spots, traces of the subterminal and sometimes a distal edging 
to the postmedian ^remain white, while the median shade is indicated in deeper blackish. Occurs also among 
griiiecr. the following. — griseor Mc.Dunnough (12 c) is intermediate between the two preceding in the amount of 
the dark irroration but, although it seems to have become almost a local race in British Columbia (whence it 
was described), it is scarcely a well differentiated subspecies, as a good many eastern specimens, especially 
of the first broad, closely approach it, so that Rothke, in naming the two extreme forms, considered it the 
normal. — The early stages of pendulinaria are well known and have been more or less fully described, par¬ 
ticularly by Scudder and Dyar. The larva feeds on sweet fern (Comptonia), blueberry (Vaccinium) and other 
plants and has 6 instars. Its general colour is green, variable in intensity, with rust-red or brownish head and 
markings; but a brown form is known, at least in the first stage. Widely distributed in Canada and the United 
states, the imago from May to early August, resting on tree-trunks. 
data rut. C. dataria Hulst (12 d), described as ochreous washed with snuff-colour, recalls the Palaearctic porata L. 
in its coarse irroration and strong median line or shade. Moderately variable, including the size, though the 
“13 mm” given by Hulst seems exceptionally small. The 3 originals were from California and I am told by 
