>>44 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
1070), that E. americalis feeds iu the larva state in the nests of an ant 
(Formica ru/a). He also stated that so far as he knew this was the first 
lepidopteroas insect known to develop in ants' nests. This statement, 
however, elicited from Lord ^Walsinghain the following statements, pub- 
lished in the same magazine (January, 1884, p. 81): ''Noticing your 
mention of Hclia amerieaUi as a myrmicophilous lepidopteron, I would 
remind you of Myrmicocela oehraceella Tgstr., which is found also in 
ants' nests. It is allied to the true Tinea." 
According to Guenee, however, the larva of E. americalis u lives on 
leguminous plants, as Hedysarum. Melilotus, Pisum etc., and even on 
corn, and is very destructive." He adds that the chrysalis is contained 
in a cocoon spun between leaves. 
FN. 283.— Helia &mula Smith del. 
Larva. — Body moderately thick, slightly taperiDg towards each end, dull brown, 
with a well-marked dorsal and lateral line; the piliferous warts arranged much as in 
Tortrix fumxferana, which the larva somewhat resembles, but the warts not so con- 
spicuous. The head is slightly paler than the body. 
Pupa.— Body short and thick, rather fuller than usual, color pale horn-brown. Ab- 
dominal spine broad and thick, subcorneal, rounded; vertically flattened above and 
beneath, the surfaces being somewhat convex, and the sides ridged above and below. 
At the extreme end of the spine are two long slender bristles curved at the end ; on 
the upper side of the spine are two bristles which converge and are closely connected 
with the two at the tip. Length. 8 to 9 mm . 
Moth. — Fore wings ash-gray, darker on the outer half, crossed by three black lines. 
The first line, situated at the base of the wing, is short, and represented by a black 
costal mark, succeeded by a curved black line ending just behind the median vein, 
not crossing the wing. Second line zigzag, situated on the basal fourth of the wing ; 
it begins as an oblique mark on the costa, edged within with white ; behind, the line 
makes two sharp teeth : on the median vein it points inwards, and again outwards in 
the submedian space. The third line is much broader and less wavy ; it curves 
inward on the discal space, partly inclosing a large diffuse, discal, ocherous patch. 
Above this patch on the costa is a black mark bordered on each side with white : a 
submarginal, fine, wavy, white line. At the base of the fringe is a black interrupted 
line. Hind wings ocherous gray, crossed by three diffuse wavy blackish lines. Ex- 
panse of wings, 20 to 22 mm . 
27. The pitch-drop worm. 
Piuipestis Zimmermanni Grote. 
This is said by Mr. Zimmerman to be destructive to young spruces in 
New York. (Cau. Ent.. xn, 59. See p. 731.) 
