112 tMay, 



described as americanm from North America ; lie also showed series of Plebeius 

 argyrognomon, Brgstr., taken by him at Allen and Abisko, Swedish Lapland ; 

 P. argus, L., var. Corsica from Corsica, and P. argus approaching var. hella, H.-S., 

 from Digne, Basses-Alpes. Mr. H. Hamilton Druce, examples of Pleheius argus,Jj., 

 taken by him in various localities in Russia. Mr. G. Meade- Waldo, a gynandro- 

 niorphous example of Euchloe cardamuiex, bred from a larva found at Hever, Kent. 

 Mr. H. M. Edelsten, stereoscopic ])hotographs of the anal segments of Coenobia 

 rufa ? , showing the spines, which are driven into the dead stems of Jiincus 

 lamprocarpiis. Mr. W. Schmassman, on behalf of Mr. H. Wette, a curiously 

 marked ? of Chri/sophanus hippotho'e caught on July 22nd, 1908, at Goeschenen, 

 Switzerland. The black spots, forming the marginal row on the under-side of the 

 two fore-wings and one of the hind-wings, were elongated. The other hind-wing 

 and the wings on the upper-side were normal. Mr C. O. Waterhouse, living males 

 and immature females of the Mammoth Scale Insect, which infests the M'sasa tree 

 in Rhodesia ; also a dead example of the fully-grown female scale. They are what 

 are known in collections under the generic name Monophlcebus. The female has 

 been named Lophococcus maximua by Mr. Lounsbury. Mr. E. A. Butler, one species 

 of Cohoptera and five of Hemiptera recently added to the British Fauna ; also the 

 unique example of Myrmecocoris gracilis. Sahib., taken by him at Fleet, Hants, in 

 August, 1903. Mr. G-. J. Arrow, examples of a Cetoniid beetle, Dicronorrhina 

 (subg. Neptunidex) manowensis, Moser, to show injuries of a remarkable character. 

 In all the marks wei-e perfectly symmetrical and occupied exactly the same position. 

 Dr. K. Jordan, the polymorphic Papilio lysithous and P. hectorides from Brazil 

 and the models which they imitate. The exhibit illustrated a phenomenon observed 

 in various groups of butterflies : that a mimetic species is broken up into a number 

 of very different-looking individual varieties, which are all specifically the same, while 

 the imitated models are specifically distinct from one another; he also exhibited both 

 sexes of the peculiar Peruvian butterfly Styx infernalin described by Staudinger as 

 a Pieiid, but certainly an Erycinid in tlie structure of the antennae, thorax, legs, 

 neuration and the egg. Dr. Jordan also showed, on behalf of the Hon. N. Charles 

 Rothschild, an Acrotylus which Mr. Rothschild observed in some numbers in the 

 desert on the Upper Nile. The colour of these small locusts so closely agrees with 

 that of the sand and the pebbles (also exhibited) that, when settled, the insects 

 disappear entirely from view. Mr. J. W. Tutt opened up a discussion on the 

 aflinities of the two Palajarctic species Plebeius argus, L. {nf-gon, Schiff. ; argyro- 

 toxus, Brgstr), and P. argyrognoinon, Brgstr. {argus, aucforum). After giving an 

 account of the confusion in the nomenclature, he proceeded to explain the structural 

 and superficial differences. It was also remarkable to note that both showed a 

 parallel range of variation in the mountain, plain, and southern forms respectively. 

 Dr. T. A. Chapman then gave a demonstration with the lantern, illustrated by many 

 slides of the structural differences of the two species in the larval and imaginal 

 stages, and criticised the opinion expressed by Staudinger that argus and argy- 

 rognomon have not yet entirely developed into separate species. The microscopic 

 preparations showed that the " claw " or spine over the front tibiae in argus was not 

 even represented in rudimentary form in argy rognomon. — H. Rowland-Beown, 

 Hon. Secretary. 



