216 THE entomologist's record. 



yellow, but rarely a combination of the two colours in one cocoon. He 

 also remarked that Mons. Oberthiir, in Insect Life, had recently written 

 on dimorphism, and assumed that in sexually dimorphic species the $ 

 departed from the type, and that in sexually dimorphic species a form 

 of the $ ought to occur like the $, and instanced Argynnis niphe, 

 which is generally distinctly sexually dimorphic, having produced a $ 

 form at Trichonopoly similar to normal males. — Ed. 



City of London Entomological and Natural History Society 

 — October \6th. — Exhibits: Coleoptera — Mr. Beck, a Longicorn from 

 India ; a series of Cicindela sylvatica from Aldershot ; Dytiscus dimiatus 

 from the New Forest and several other species. Mr. Cripps, pupa- 

 cases and perfect form of Hypera fasciculata, and red var. of Lasia 

 glflbosa, Mr. Bryant, Calosoma inquisitor, Silpha ^pioictata, Geotrupes 

 pyreftceus, and numerous other species from the New Forest. Lepidop- 

 tera : — Mr C. A. Briggs, varieties of Abraxas grossulariata from the 

 London district. Mr. Lewcock, on behalf of Mr. Robson of Hartlepool, 

 photographs of that gentleman's large series of the latter insect, also of 

 D. vinula. Mr. Jager, a fine series of Callimorpha hera and the 

 Chelonidce. Mr. HoUis, Callimorpha hera. Mr. Heasler, an example 

 of Deilephila eiiphorbii?, captured at light in Paris. Mr. Machin, a 

 series of Arctia niendica, including specimens from Huddersfield and 

 the south of England, also the Irish form. Mr. Smith, various 

 species from Lyndhurst. Mr. J. A. Simes, a number of life-histories. 

 The following species of Tceniocavpa were exhibited. Mr. Bouttell, a 

 series of opiina, taken at Wanstead on grass stems near dwarf sallows in 

 1 88 1 and 1882. Messrs. C. G. Barrett and J. A. Cooper made observ- 

 ations respecting the capture of the species in the south of England, 

 and Mr. Fenn stated that the insect had also been taken at Lewes, 

 Sussex. Mr. C. Fenn exhibited populeti from Lee. Mr. J. A. Cooper, 

 gothica var. gothicina and instabilis. Mr. Mera, opima and populeti. 

 Mr. Mason (of Somerset), long series of vmnda. Mr. Boden, the red 

 form o{ gracilis. Mr. Bright, a fine series of the red form of gracilis 

 from the New Forest. Messrs. A. J. Hodges, Clark and Tutt, their 

 cabinet drawers containing the genus. Mr. Raine, Taniocampa larvje. 

 Other exhibitors were Messrs. Battley, Hanes, Gurney, Milton, Nichol- 

 son, etc. Mr. J. W. Tutt opened the discussion and gave an outline 

 of the genus, and its phases of variation. The following is a brief 

 summary of his remarks : — 



I. Structure. The genus Tcentocampa belongs to the Orthosiid^ 

 and the species in the genus, although very closely related, are 

 sufficiently distinct to give broad sub-divisions. The species leucographa 

 and rubricosa, although very closely allied to each other, are very 

 dissimilar to hyperborea {alpina), which seems to be an aberrant member 

 of the Agrotidce, and there appears no reason whatever for uniting these 

 species in the genus Pachnobin. Instabilis and opitna are also very 

 closely allied, populeti superficially so, but structurally more closely 

 allied to stabilis, whilst nnnida is perhaps, next to opima, more closely 

 allied to instabilis than any other ; gracilis, in its typical forms, appears 

 to be fairly distinct, and although perhaps most closely allied to stabilis, 

 its dark varieties run insensibly into the almost parallel forms of 

 instabilis. Gothica, through vdit. gothicina, appears to be more closely related 



