XCIX 
Exhibitions, §c. 
Mr. M‘Lachlan exhibited a species of Mantispide from Bahia; he believed it to 
be the female of Trichoscelia notha, from the male of which, described and figured by 
Ervichson, it differed in being half as large again, in having the anterior femora unarmed, 
the abdomen ochreous beneath, and provided with a long tlexile ovipositor; in all other 
characters it agreed with Erichson’s insect. The species was especially remarkable by 
the lobate dorsal ridge of the abdomen, and by the greatly dilated and compressed 
posterior tibia, resembling the pollen-bearing organs of a Bombus. 
Mr. M‘Lachlan exhibited, on behalf of Mr. B. Cooke, two examples of gynandro- 
morphism. The first, a sawfly, Dolerus madidus of Klug, the left-hand side presenting 
male characters, the right side female characters. The second, a Trichopterous insect, 
Limuephilus striola of Kolenati, in which the palpus, antenna and wing on the right- 
hand side were of the male form and on the left side of female form, whilst the 
abdomen was wholly female: this specimen was captured by Mr. Cooke near 
Manchester. 
Mr. M‘Lachlan also exhibited two monstrosities, both sawflies, which he had 
received from Prof. Zeller. One was an example of the rare European species, Hylo- 
toma fasciata of St. Fargeau, in which the left posterior tibia was two-jointed, the 
second joint being greatly dilated. The other, a specimen of Tenthredo scalaris of 
Klug, with five wings, three on the right side, the anterior and posterior being perfectly 
normal, whilst the intermediate one combined the neural characters of both. 
Mr. Bond exhibited three recent additions to the list of British Lepidoptera, 
namely, Psyche crassiorella, Bruand, Grapholitha ravulana, H.-S., and Coceyx ver- 
nana, Anaggs (Ent. Mo. Mag. vol. iv. p. 122; see also p. 154). 
Mr. T. W. Wood (who was present as a visitor) exhibited a number of pup of 
Papilio Machaon, Pieris Brassice and P. Rape, exhibiting various shades of colour 
corresponding with the colours of the surfaces to which they were attached; and read 
the following 
Remarks on the Coloration of Chrysalides. 
“ All Lepidopterists are probably aware of the very great variability in the colonring 
of the chrysalides of butterflies, and I am able to state, as the result of some years of 
observation, that their colours are more or less derived from the objects in their im- 
wnediate vicinity. It is obvious that this assimilation of their colours to their sur- 
roundings is of great use to thein, tending to their concealment and consequent im- 
munity from the attacks of enemies during their period of exposure in a helpless state. 
The specimens of chrysalides on surfaces of different colours which I now exhibit are, 
I trust, sufficient to convince you of the truth of this statement. I find, as the result 
of my experiments, that the skin of the chrysalis is photographically sensitive for a 
few hours only after the caterpillar’s skin has been shed, and, as might be expected, 
by putting the specimens in the sunshine at the time of changing, and surrounding 
them as much as possible with any desired colour, the most successful results have 
been obtained. Under these conditions the specific markings are almost entirely over- 
powered if necessary to the assimilation of colour; and these markings are, in fact, 
entirely overpowered in the exhibited green varieties of Papilio Machaon and Pieris 
Rape. Ihave not had an opportunity of seeing the former species in its natural 
haunts, but the latter I have observed, and have found the green variety of the chrysalis 
