70 NOTES FROM THE SARAWAK MUSEUM. 



strongly punctured, whilst in its mimic the pronotum is strongly 

 punctured and the nervuration of the wing-rudiments gives also 

 an impression of punctures. The locust seems to fiequent old 

 jungle and one example was found running' about amongst dead 

 and decaying vegetation, a situation in which the model is fre- 

 quently met with. As might be expected from the comparatively 

 small size of the hind femora the insect possesses but feeble 

 leaping* powers, appearing to trust rather to its turn of speed 

 as a runner. Whether this is the adult stage or not is uncer- 

 tain ; the presence of wings would seemingly detract from the 

 marvellously close mimicry, and one is inclined to suspect that 

 they have secondarily become atrophied. In July another 

 specimen differing in no wise from that just described was 

 obtained, and also a very young example. This last was 

 most interesting - , since at this stage both body and leg's were en- 

 tirely dark blue and constituted a close mimic of a very small 

 tig'er-beetle of the genus Collyris, a flower-haunting- species ; 

 the young locust was taken on the blossoms of a flowering- tree, 

 so that not only in colour but also in habits it differed markedly 

 from the adult. Bearing in mind the mistakes made over this 

 insect by such distinguished entomologists as AVestwood and 

 Duponchal. I made a careful search through our collection of Cicin- 

 delida?, and was delighted to find in it yet another specimen of 

 this very deceptive locust : this was intermediate in size between 

 the youngest and the oldest stage known and mimicked another 

 species of tiger-beetle (? Collyris sp. ). Except in the matter of 

 size there was little difference between this stage and the oldest 

 stag-e. and I have naturally nothing' to record of its habits. 



I am unaware of any other example in the insect world af- 

 fording- a parallel case of mimicry ; it is the general rule that a 

 mimetic insect is mimetic at only one stage of its life history, 

 or if at more than one. the models for the different stages are 

 different ; e.g.. the larva of the hawk-moth Chaerocampa aurata. 

 is remarkably snake-like, but the pupa is buried and the imago is 

 protectively coloured : or again — the Mantis, Hymenopus bicornis 

 is, when adult or when half-grown, a floral simulator, but the 

 newly-hatched young mimic the newly-hatched young' of an ex- 

 tremely common and highly distasteful bug-, Euhjes anuvna. The 

 Condyiodc/v. however, at all stages of its life history, so far as 



