INSECTA, 
275 
elaborate paper published in the Linnean ^ Transactions.’ He regarded the 
so-called mimetic resemblance as only an exaggerated analogy ” (Proc. Ent. 
Soc. 18GG, pp. xxxvi-xxxviii). Wallace and Bates argued in opposition to 
Westwood (X c. pp. xxxviii-xl), Bates maintaining that the case brought for- 
ward by Westwood was simply one of monstrosity, and had no bearing on 
the question at issue. Sharp also made some I’emarlcs on the subject (/. c. 
pp. xl-xli). A further discussion of the question took place at a subsequent 
meeting of the Society, in which Sharp, Wallace, and Westwood took part 
(/. c. pp. xlv-xlvii). 
In connexion -^th this question, and in illustration of the aversion which 
birds may entertain to eating certain insects (the presumed cause of most 
mimetic resemblances), Stairiton mentions the rejection by young Turkeys of 
a single specimen of Sjnlosoma menthastri, when mixed with numerous spe- 
cimens of Agrotis cxclamationis, which they devoured greedily. Weir adds 
that cage-birds reject .both Sjjilosoma menthastri and /S', lubricipeda^ which 
Westwood accounts for by saying that these insects emit a fluid of disagreeable 
odour from behind the collar. Bates says that some Heliconiides emit a dis- 
agreeable odour from the abdomen when that part of the body is pre,ssed 
(IToc. Ent. Soc. 18G6, p. xlv). 
SiEBKE (Entomologische Undersogelser) has given lists of Insects of various 
orders captured by him in the summers of I8G4 and I8G5 — in the former 
year at Bergen, Aalesund, Bomsdal, Fladmarlf, and other localities on the 
west coast of Norway, in the latter in the vicinity of the Christiania fjord. 
MacLachlan ^‘On the similarity of the Insects of North America and 
England.” Ent. M. Mag. iii. pp. 70-71. (See Lepidopteha.) 
A discussion on the sinking of insects into snow, in which Muller’s re- 
marks are commented on, and Pascoo, Westwood, Braylpy, and Lubbock took 
part, is recorded in Proc. Ent. Soc. 18GG, p. xix-xx. 
A. Mulleh has remarked (Zoologist, 18GG, pp. 273-279) upon a few of the 
phenomena of Insect-life at great elevations, and especially upon the fact of 
many insects of alpine regions remaining for several seasons in their preparatory 
states, and upon the sinking of insects into the snow observed by Pascoe. 
With regard to the latter phenomenon, Muller quotes a passage from Tscliudi’s 
‘ Thierleben der Alpenwelt ’ confirmatory of Pascoe’s observations. 
Wollaston (Zoologist, 18G0, pp. 313-317) notices Muller’s remarks, and 
mentions his having observed, at the Pass of St. Gothard, great accumula- 
tions of insects, chiefly Beetles, at the bottom of small rounded depressions 
in the snow. Wollaston suggests that the process of melting productive of 
these hollows, and of those observed by Pascoe, was probably commenced by 
the settling on the snow of insects brought up from the lower regions by cur- 
rents of air &c. In contrast with the causes supposed by Muller to lead to the 
suspension of development of many alpine insects, Wollaston refers to his 
experience among the Cape Verde Islands, on some of which rain does not 
fall sometimes for several years ; but on the recurrence of moisture, insects, 
like the vegetation, suddenly appear in abundance. 
Bn AUN remarks on the production of galls in various plants by insects 
of different families (Sitzungsber. Ges. naturf. Freunde zu Berlin, Dec. 20, 
18G4). His observations relate chiefly to the form and structure of the galls. 
Girard notices the occurrence of other glutinous vegetable matters besides 
the pollinic masses of Orchids on the heads of insects, and mentions particu- 
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