11 
continued beyond the apex of the pileus for a short distance, the skin 
of the pileus near the apex being reflexed and forming the same, covering 
the gills of a small reversed mushroom. 
Paper.— Mr. Donisthorpe read a paper on the “ Coleoptera of 
Weymouth.” The following is a brief summary : He remarked at the 
commencement that the strata of this part of the country belong 
chiefly to the Oolitic group; the chalk formations are also largely 
represented. The “ Ghesil Beach ” was found to be a good collecting 
ground. The severe drought of 189G, following a mild winter, made 
things scarce, and also appeared to have some effect on the individuals 
that succeeded in completing their development. Several abnormal 
forms were taken, among them being a very small specimen of (reotnqm 
mutator, Harpalus caspius, quite green instead of the usual black, tinged 
with green about the thorax, a small specimen of Taphria nivalis, quite 
unlike the type form, and most curious of all, a specimen of Pterostichus 
yracilis with three tarsi on one leg. Members of the Carabidae and 
Staphylinidae were principally met with, but he, with his friend Prof. 
Beare, was able to compile a list of species amounting to nearly 300. 
Two myrmecophilous beetles occurred, the rare Trichonyxmarkeli taken 
by Prof. Beare, with Formica tiara, near the Ghesil Beach, and the 
curious Clarifier testaceus at Upwey and Portland, with both Formica 
tiara and /•'. niyra. Three species of Bledius, It. spectabilis, Jl. unicornis 
and B. a renanus, were obtained by digging up the sand on the Ghesil 
Beach, and dropping it into small pools of water. Cillenus lateralis 
occurred in profusion on the flat sand near the mouth of the Fleet; 
the insects being totally covered by the sea for several hours at high 
tide. Of rare species, two Harpalus obscurus were taken under stones 
near the Ghesil Beach, quite a new locality. The existing specimens 
have previously been obtained in Cambridgeshire. C 'ymindis a.villaris, 
Ma so re us wetterhalii, Harpalus picipennis and //. melancholic us from the 
Ghesil Beach. Pterostichus yracilis, liembidiwn clarkii and Lathrobium 
filiforme were secured in a marshy field near Dorchester, all that is now 
left of the Herringstone Marshes, a locality mentioned in Dawson’s 
“ Geodephaga Britannica.” Mr. Heasler proposed a vote of thanks, 
and referring to the destruction of localities, such as the Hammersmith 
Marshes, said that he had found Bembidium , cl arid at Hendon Reservoir, 
and Acupalpus computus on Mitcham Common. Dr. Chapman, Messrs. 
Jennings, Clark and Tutt continued the discussion, which became 
animated over the probable cause of the increased number of limbs 
such as was mentioned in the paper. Mr. Tutt suggested the cause 
must be the division by fission from some reason of the imaginal disc 
or germ within the larval form. Mr. Clark, referring to his having 
bred Stauropusfayi, said that he had known the lame fight, and a leg 
bitten off in that stage resulted in a shortened leg in the imago. Dr. 
Chapman had recently seen a lizard with two tails, a possibility of 
which he had been formerly sceptical. In this instance the bifurcation 
did not commence until about three inches from the root, and both 
divisions were slender and tapering, showing the latter acquisition was 
of some standing. The lizard must have received some injury at the 
spot where the bifurcation occurred. 
May 2nd, 1890.— Chrysomela lamina. —Mr. T. B. Jennings passed 
round specimens of this species on its food-plant Anthriscus sylrestris 
