RHOPALOCERA MALA VAN A. 333 



observed several species to " take long circuits, returning after the lapse of a few minutes in 

 the same direction, and often in precisely tlic same track they have just passed over. I have 

 often, in the old cotton-fields of East Florida, waited Ijy the side of a large bush of some 

 Vaccinium, or Andromeda, for a specimen of /'. ajax, which I had seen pass it ; and my patience 

 in remaining quiet for a few minutes has mostly been rewarded by its capture." * 



As already remarked {antea, p. 322), Papilio, although treated here as a single genus, 

 possesses structural cliaracters which in other families have been — and by myself in this 

 work — used to denote generic separation, and though several lei)idopterists are now projiosing 

 this course with PapiUo, the work has been already exhaustively done by C. and K. Feldcr in 

 their ' Species Lepidopterorum,' in which the structural details which separate their sections 

 and subsections are fully and carefully given, so that the work of the generic creator in 

 PapiUo is almost merely that of a proposer of new generic names. I have also followed the 

 method of specific grouping proposed by Mr. A. K.Wallace in his well-known memoir, "On 

 the PapiHonida3 of the Malayan Region." 



Prof. Wood-Mason has drawn attention to "mimicry" among several Indian species 

 which belong to "scentless" groups, and which "mimic" other species belonging to "strong- 

 scented and nauseous" groups, t 



NoX Group. 



a. Xo.r-group, Wallace (part), J Traus. Linn. Soc. vol. xxv. p. 23 (1865). 

 Sect. LXVI. et LXVII., Felder, Spec. Lepicl. Pap. pp. 87, 84-5 (18G-i). 



Abdominal fold in <? very large ; aual valves small but swollen ; posterior wings simple or caudutely 

 produced. 



This is a small group of obscurely coloured species, which is almost confined to the 

 Indo-Malayan region, and particularly well represented in the island of Borneo. The females 

 are larger and always somewhat more brightly coloured than the males. In the Philippine 

 species P. semperi, Feld., the posterior wings are caudately produced. § 



Two species only are known to the writer as found in the Malay Peninsula. A third — 

 P. nox, Swains. — has been recorded by Mr. Wallace as found at Penang, on the authority of 

 a male specimen contained in the British Museum, but this appears to be incorrect, as 

 Mr. Butler, who kindly looked into the matter for me, writes " locality Penang is not attached 

 to our ^ P. nox, and does not exist in our Eegister. The specimen was presented by 

 Dr. J. Hooker." 



Ann. & Ma<j. Nat. Hist., February, 1882, p. 103. Mr. Wood-Mason in this paper promised a more ^f}''''^^f'-l'°l^'^°}' 

 subject, '-Notes on the Phenomena of Mimicry, as exempHfied by the Papibomdae of our North-eastern Indian 



* Gen. Diuni. Lep. vol. i. p. 7. 



on the su 



Possessions," a ptibHcation which has not yet appeared. 



t Mr. Wallace proposed to include here the " Indian Philoxenus-gtoni,, but this seems better treated separately as by the 

 Felders in a separate section (Sect. LXIX.-Spec. Lepid. Pap. pp. 37 and 8G), smce genencally named Byasa b> Mi. Mooie 

 (Proc. Zool. Soc. 1882, p. 258). 



i Mr. Wallace has also given the larval characters of this and the two foUowins-Coon and f "^^/'^^''^-^j^?"?;' ^^^^ 

 "Larv* short, thick, with mmierous tleshy tubercles; purplish." I have not relied on these ? '^■■=\'^'"^' ''^*^ '' '-'"'/^l^lVa 

 all the butterflies included iu the gi-oups are not known; and though analogous reasoning would point to a simUautj oi lanai 

 character, we must not forget that in nature it is the unexpected that is so frequently discoveied. 



Sept. 25, 1885. ■* ^ 



