XXIV 



close proximity, while those of the other species scatter themselves hefore 

 spinning up. 



Mr. Rutherford next exhibited a specimen of a Papillo which appeared 

 to be a true case of so-called " hermaphroditism " occurring between Papilio 

 Cynorta and P. Boisduvalianus, the left side of the wings sliowing the 

 markings (somewhat interrupted) of the former, and the right side those of 

 the latter species. This specimen seems to confirm the suspicion that the 

 two forms are but the sexes of one species. 



Mr. Meldola exhibited photographs of two species of tropical Orthoptera 

 allied respectivel}' to Pterochroza lllustrata and P. ocellata, Serville, which 

 had been sent to Mr. Darwin by Dr. Zachurias, of Chemnitz, on account of 

 the very perfect leaf-like appearance of the fore wings, this " protective 

 resemblance" extending to microscopic detail. The hind wings were orna- 

 mented with ocellated spots, probably acquired through sexual selection. 

 Mr. Meldola also exhibited some beetles of the genus Spermophagus and 

 their cocoons, which had been found in a packet of seeds of Cassia neglecta 

 sent from Brazil by Dr. Fritz Miiller to Mr. Darwin. The full-grown larvae 

 had emerged from the seeds, leaving the latter in a damaged condition, 

 and had spun the small cocoons from which the beetles had issued, these 

 insects having reached this country alive. Mr. Meldola next exhibited the 

 proboscis of a Sphinx-moth caught by the narrow tube-like nectary of a pale 

 yellow Hedychluin . This specimen had also been sent from Brazil by 

 Dr. Fritz Miiller, who states that Sphinx-moths are frequently found caught 

 in this manner. Mr. Meldola, in conclusion, stated that he had been 

 requested by Dr. Fritz Miiller to ask the Members of the Entomological 

 Society to aid him in his microscopical examination of the scent-producing 

 organs of Lepidoptera by sending to him, addressed to Blumeuau, Santa 

 Catharina, Brazil, wings of butterflies, especially of such species as are not 

 found in that country, the names of the insects in all cases to be given. 



Sir Sidney Saunders communicated the following notes by M. Lichten- 



stein : — 



" On Phylloxera vastatrix and other Plant-lice. 



" Our learned President, Prof. Westwood, had the goodness to mention 

 in his Address for the past year my comments on the genus Phylloxera. 

 He justly criticises my having given to the sub-genus established for the 

 grape-root louse the name ' Rhizaj)his,' Planchon, which dates from 1868, 

 and not Peritymbia, Westw., which is five years older. lu my next work, 

 which will shortly appear, this oversight shall be corrected. 



" I now beg to submit to the Entomological Society some new ideas 

 about the cycle of life of Aphidians. Ten years' breeding of large numbers 

 of root- and leaf-lice has led me to the following conclusions : — 



" Like all insects, Aphidians are always oviparous. The females are 

 always apterous. That which has so often been termed a ' winged female,' 



