USE OF THE HAIRS OF ACRONYCTA ALNI, 39 
Haukalid. Necrophorus mortuorum, Lina e@nea, and Trichius 
fasciatus occurred at Buar Brae. Of these species, Lina e@nea 
infested the hazels in thousands along the road to the glacier, 
and its larve in particular were speedily reducing the bushes to a 
skeleton condition. The handsomely-barred T'richius fasciatus. 
was found exclusively on the blossoms of the scabious, where it 
bore a close superficial resemblance to a humble bee. Among 
Hymenoptera may be enumerated, from Roldal, Bombus lappo- 
nicus, B. agrorum, B. subterraneus; from road to Sceter, B. 
lucorum, B. subterraneus; from Bratlandsdal, B. lucorum, B. 
agrorum; from Buar Brae, B. lucorum, B. agrorum, B. lapponicus ; 
from Bergen, B. agrorum. Also from Buar Brae a single speci- 
men of Vespa media, and of Tenthredo chloros; from Roldal, T. 
mesomela, Formica nigra, Allantus arcuatus, Odynerus pictus, O. 
(Lionotus) tristis, Megachile centuncularis, Lyda histrio, Ophion 
luteum, and two or three unnamed species of Ichneumonide. The 
Diptera of Roldal include Calliphora vomitoria, C. grenlandica, 
Sarcophaga mortuorum, Scatophaga stercoraria, Musca cesar, Eris- 
talis tenax, EH. similis, H.nemorum?, Mesembrina meridiana, Oliviera 
lateralis, Sarcophaga hemorrhoidalis, Helophilus tumulatus, H. 
frutetorum, Chrysotoxum fasciolatum, Polietes lardaria, Hematopota 
pluvialis, Scatophaga sp. ?, Therioplectes auripilus (tabanus), Volu- 
cella bombylans, Eristalis arbustorum, Scyphus ribesii, S. sp. allied 
to corolle, Platychirus manicatus, Syritta pipiens. On the road to 
Seeter, Therioplectes auripilus, and Hematopota pluvialis once 
more; and from Buar Brae, Volucella bombylans and Empis 
tessellata. Orthoptera conclude the list with a single specimen of 
a common species of Pezotettiz. 
USE OF THE HAIRS OF ACRONYCTA ALNI. 
By Maurice Firz-Gipson. 
THE larva of this insect is unique, among those which have 
come under my notice, as having two perfectly distinct forms in the 
course of its larval existence. Into these forms I have made some 
examination. The first form, which it assumes for the purpose 
of escaping the notice of birds and other enemies,—the entomo- 
logist no doubt included,—I shall call the Cryptic* (xpirtw, I 
hide) or “concealing”? form. In this form, which the larva 
wears until the last moult, a bird’s dropping is most successfully 
imitated; and as the larva lies on the upper side of an alder leaf, 
with its half-curled body gradually shading from white to grey 
and from grey to brownish black, the whole presenting a half 
shiny, half greasy appearance, not one in a hundred of non- 
entomologists would believe that the somewhat unpleasant- 
* This designation is borrowed. 
