3D2 



Mr. G. A. K. Marshall on 



Gkoup. Species. 



SCARAB.EID/E. Ollitis alcxis. 



Onlli oplia/jus gcaclla. 



Gymnoplcurus smarag- 



dinus. 

 Onitieellus militaris. 



IIeteromeha. Praogcna fcstiva. 

 Carauuj.k. Antlim thoracka. 



,, massilurda 



(only eateu when 

 offered piecemeal). 

 LoNGicoRNiA. Ceroi^lesis fallax. 



Size and Appearance. 



Medium ; brown elytra and 

 legs, iridescent green thorax 

 iiml head. 



Sniallisli ; similar colouring to 

 above. 



Small ; iridescent gi'een, blue, 

 or red. 



Small ; probably when fresh 

 iridescent dark -green with 

 orange markings. 



Medium ; almost black with 

 purplish iridescent reflec- 

 tions on elytra, bluish on 

 thorax. 



Large ; black, white spot on 

 thorax and white margin to 

 elytra. Huge mandibles. 



Large ; black with pale mar- 

 gin to elytra. Huge man- 

 dibles. 



Large ; black, yellow-banded, 

 Cantharid type. 



22. The Chief Conspicuous Specially-Defended 

 Groups in the Coleoptera inferred from 

 G. A. K. Marshall's Experiments. A Compari- 

 son BETWEEN Coleoptera and Lepidoptera in 

 this Respect. (E. B. P.) 



It is of great interest to attempt to conclude from the 

 results of the experiments on the palatability of conspicu- 

 ous Coleoptera contained in this memoir, and from 

 previously recorded observations and experiments on the 

 same order of insects, what are the chief specially defended 

 groups which may be considered to stand in the same 

 ])osition towards their allies as the Ithoniiimv, Danain.v, 

 HeliconiniB and Acnvinx i\o to the rest of the Rhopalocera, 

 and the Agaristidx, tSyntomidic, Zygienidie, etc., do to the 

 rest of the Heterocera. 



The chief memoirs upon which the conclusions stated 

 below have been based are published in the Transactions 

 of the Entomological Society of London. They are the 

 papers by Mr. C. J. Gahan (1891, p. 367), by Mr. H. 

 Donisthorpe (1901, p. 845), and the Presidential Address of 

 Cnnon W. W. Fowler, Jan. 15, 1902 (Pioc. 1901, p. xxxiii). 

 I have also had the opportunity of reading the manu- 

 script of an important paper by Mr. R. Siielford on mimicry 

 in Bornean insects, now being published by the Zoological 



