tRANSACflONS OP SECTION tt. 797* 



Spotted Species were found near Kucliing together -with several STpeciea of Erotylida 

 and a Pentatomid bug with the same general appearance. Another group of dark 

 Endomychids was rendered conspicuous by numerous spines (Ampkistermcs). 



Two groups of LoDgicorns were mimicked by other Longicorns belongino- to 

 entirely different sections. The iridescent green Cerambycidce of the genus 

 Chlori'dolum were closely resembled by two Lamiidce (Saperdi7ic8 ? genus, and 

 Chlorisanis viridis) and by the Cerambycid genera Xijstrocera, Psalanta, and 

 Lepturn. Many genera and species of the banded Cerambycid Clytince were 

 very closely mimicked by Lamiidce and other Cerambycidce. This last case is of 

 peculiar interest, inasmuch as the Clytince are themselves perhaps the most con- 

 spicuous mimics of Hymenoptera to be found in the whole of the Longicornia. 

 All over the world their numerous species commonly present a black yellow- 

 banded appearance bearing a general resemblance to wasps, while mimicry of 

 Mutillidcc, Cicindelida, and, in the allied Tillomoyphince, of ants is also found. 

 When, therefore, we also find that this group itself furnishes numerous models to 

 other Longicorns, we are driven to conclude that it is in some way specially 

 defended, and that its resemblance to Hymenoptera is Miillerian rather than 

 Batesian. 



The mimetic resemblance to the aggressive and active Cicindelidce was very 

 marked, examples being afforded not only by Longicorn beetles of the genera 

 Sclethrus and Collyrodes, but also by a Dipterous insect found flying together with 

 its model (Collyris emaryijiata) on Mount Seramba, December 1898. This is the 

 first example of the mimetic resemblance of a fly to a tiger beetle. The remark- 

 able Ijocustid mimic Condylodera tricondyloides (or a closely allied species) 

 described by Professor Westwood from Java was also rediscovered in Borneo, and 

 its habits for the first time observed. 



Indirect evidence that the mimicry of Cleridce is Miillerian rather than 

 Batesian is similar to that which pointed to the same conclusion in the Longicorn 

 Clytince. One Bornean species of a Clerid genus (Thcmasimus) resembled a 

 Mutillid, another (genus near Tenerus) a Lycid, while a third, a species of Lemidia, 

 was mimicked by the Longicorn Daphisia puhhella. 



_ Among the Diptera a splendid black Hyperechia (H. /era) was a beautiful 

 mimic of the abundant Xylocopa latipes, another example of parallelism with South 

 African bionomics. An allied species, Laphria sp. near Terminalis, was an 

 excellent mimic of Salius aurosericeus. Dipterous mimics of tlymenoptera are 

 extremely abundant in Borneo: remarkable among them was a species which 

 mimicked an ichneumon of the genus Mesosternus. The short antonnje of the 

 fly in no way resembled the very long black and white ones of the ichneumon. 

 The fly, however, held up its black and white legs, applying their bases to its 

 head and moving them so that they closely resembled the antennte of the 

 Hymenopterous insect in movement as well as in colouring and proportions. 

 Another species of fly possessed true antennae which were remarkably long for 

 this order, and thus closely resembled those of an ichneumon. 



With few exceptions, the whole of the material here briefly described may be 

 seen in the Hope Department of Zoology, Oxford University Museum. 



4. ITote on an Experiment sup^Mrting the General Principle oj 

 ' Miillerian ' Mimicry. By Professor C. Lloyd Morgan, F.R.S. 



5, Illustrations of Mimicry and Protective Resemblance, 

 By Mahk L. Sykbs. 



6. The Colour Physiology of Hippolyte varidug 

 By F. W. Gamble and F. W. Keeble. 



