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loniceré, Ksp., having the spots confluent, taken at Chatten- 
den Wood, North Kent, in June last; also a specimen of 
Incurvaria tenuicornis, Stn., taken at Chislehurst, in May, 
1893. 
Mr. H. Goss exhibited, for Mr. F. W. Urich, of Trinidad, a 
series of males, females, and workers of Sericomyrmez opacus, 
Mayr, a species of Fungus-growing and Fungus-eating Ant. 
He said he was indebted to Mr. G. A. J. Rothney for kindly 
mounting the specimens on card. 
Papers Read, 
Colonel Swinhoe read a paper entitled ‘“‘A List of the 
Lepidoptera of the Khasia Hills, Part III.” 
Mr. C. J. Gahan read a paper entitled ‘‘On the Longicorn 
Coleoptera of the West India Islands.’ 
Mr. F. W. Urich communicated a paper entitled ‘‘ Notes 
on the Fungus Growing and Hating Habit of Sericomyrmex 
opacus, Mayr.”’ 
Prof. E. B. Poulton read the following paper, by Prof. E. B. 
Titchener, of Cornell University, U.S.A., entitled ‘‘ An 
apparent case of Sexual Preference in a Male Insect.” 
‘«T have had under observation during the past summer a 
“number of Diapheromera femorata. The insects were all 
‘taken from a single clump of Rubus odoratus, and have been 
‘‘fed upon the leaves of this shrub. Seven were taken in the 
‘second week in July, five females and two males. All but 
‘‘one backward female were in the same stage of develop- 
‘‘ment, having two skin-castings to come before maturity 
‘‘was reached. One of the females had lost her two front 
‘lees, and there was no renewal of these with either of the 
‘‘new skins. The first male to become sexually mature was 
‘small and weak; though he has proved to be exceptionally 
‘long-lived. He ‘chose’ the maimed female, from the group 
‘‘of four. Two days later the other male, which had left 
‘the other females untouched, was found in connection with 
“this same one, having driven his weaker rival away. The 
‘‘yemaining females, with the exception of the immature one, 
‘“‘ were fertilised subsequently. In the last week of August I 
