Jubilee (biy, and fed. up in a little over a month, all being spun up by 
the last week in July, d'bey emerged as imagines in the second and 
third weeks in August, the whole of their transformations being com¬ 
pleted in ten Aveeks. Thirty perfect insects emerged. Also a short 
series of Hesia I'niLANTiirFoRMis from the Isle f)F Man, bred from the 
sea-thrift, ADueria maritiiiia. 
Lecture.— Mr. C. Nicholson delivered an interesting lecture on 
‘“ The Microscopic Inhabitants of a Stagnant Ditch,” and he and 
friends furnished seA'eral microscopes, the exhibits under which 
included Ci/cIdsih in stem of Xitdld and Chara, Desmids from Wimble¬ 
don Common, Vnhu-clla, Hi/ilra ririilis and II. ndtiaiis, Daidiniac, 
Rotifers, &c. 
March 15th, 1H98.—^'ARIATl()^• of C.allioenja .ahniata.—R ev. C. R. 
N. Rur roAvs exhibited a series of ('. iniiiiata, shoAving considerable 
variation; some Avith scarcely any black markings on tlie forc-AA'ings, 
some orange and tAvo quite yelloAV in coloui“, instead of the usual pink 
or pale red. 
Stoutness of walls of c:ocoon of Erkmlaster lanestris.—M r. 
A. W. Mera, a cocoon of A. /uar-str/.s Avhich he had broken into and in 
Avhich he had found the larval skin of the caterpillar, tAvo pupal cases 
of parasitic diptera, one large and one small, and the dead dipteron 
Avhich had emerged from the larger pupa, but Avhich had not been able 
to escape from the compact Avails of the cocoon. The lid of the 
smaller pupal-skin aatis raised, and the legs of a dipterous imago pro¬ 
truded, but the fly had died in the skin, there being no room for its 
emergence. 
CoLEopTERA FROM H.ASTiNcrS.—Mr. L. B. Hall, a visitor, kindly 
exhibited ^ and 5 Athnn^ ilifthnin's, a species only found in the south 
of lAigland, the 5 being A'ery scarce; and ii-nd J < 'aiii/ii/ltts linraris. 
In this latter species the ? is scarcer than the , and has the elytra 
generally black Avith testaceous borders, the elytra of the <? being 
testaceous. He had also taken at Hastings the rare Hemipteron 
JAiojildpx scapha. 
CoLEOPTERA FROM West WhcKHAJi.—Mr. H. Heaslci’, series of 
Scap/iidiiiiii 4i-)iiacidatinii, taken under a rotten oak log in February. 
The undersides of S and ? AA'ere shoAvn, the centre of the meta¬ 
sternum of the <? being depressed and pubescent. Also series of 
Ai/atliidiiiiii rariaiis, taken under a decayed branch. The A has the 
left mandible produced; a peculiar character Avhich is present in 
varying stages of deA'elopment in other meml)ers of the same genus. 
The members of the genus have the poAA'er of rolling themselves into a 
ball. Also several specimens of Thuu’arthron a/finc, taken in tAVO small 
pieces of dry llidctiiH. 
r.APER.—Mr. E. M. Dadd read a paper translating and summarising 
Standfuss’ Avork on “Causes of Variation.” Discussion folloAA'ed, 
es 2 )scial interest being shoAvn in the author’s definitions of Albinism 
and Melanism. Dr. Chapman aatis of opinion that the reason AA'hy albinic 
specimens occur sporadically, Avhereas melanic ones tend to increase 
and found a race, might be explained l)y the fact that Albinism is a 
sign of Aveakness in the individual, Avhilst IMelanism is the result of 
special vigour, and thus albinos die oil, but melanic individuals transmit 
their variation to their progeny. 
