1902.] SPIDEHS FROM BORXEO AXB SIXGAPORE, 233 



ii. Mimic. Comlylodera tricondyloicles (Westw.). 

 Plate XIX. figs. 2, 4, & 6. 

 Models. Cicindelidce. Plate XIX. figs. 1, 3, & 5. 



I was fortunate enough to discover in Saiuwak the remarkable 

 Locustid, Condylodera tricondyloides, originally described in 1837 

 by Westwood from Java (Trans. Linn. Soc. vol. xviii. p. 409) ; 

 the type specimen was at first placed by Westwood in his col- 

 lection of Cicindelida?, " regarding it as an immature Colliurus 

 or Tricondyla" (1. c. p. 419). Another Javan specimen was 

 actually given the MS. name of Tricondyla ru£pes by Duponchel, 

 so close is the resemblance of this highly deceptive Locustid to a 

 Tiger-beetle. Both these historical specimens are now in the 

 Hope Collection at Oxford, and have been compared with the 

 Sarawak specimens by Mr. Malcolm Burr. 



My first specimen, which is somewhat larger than the type, 

 was found in jungle in the neighbourhood of Kuching, runnino- 

 about on the ground amongst dead leaves and other vegetable 

 debris, an environment much frequented by a large Tiger-beetle, 

 Tricoiviyla cyanea (Dej.) var. ivcdlacei (Thorns.), with which this 

 Locustid is almost identical in appearance (compare Plate XIX. 

 figs. 1 & 2). The shape, size, coloration, and even the gait of the 

 mimic so closely resembled the corresponding traits of its model, 

 that I did not suspect the importance of my find till a careful 

 examination of the collecting- box had been made some hours 

 after the time of capture. The colour of the head, thorax, and 

 abdomen of the Condylodera is a dark shining blue, the femora, 

 of all the legs are red, the hind femora (which are only slightly 

 swoUen) having in addition a proximal kack band. The head 

 with its large prominent eyes, somewhat flattened face, and 

 conspicuous jaws, is very Oicindelid in appearance. The aiitennte 

 are of extreme tenuity and are about 2| to 3 times as long as 

 the body. The densely-punctured prothorax is globosely swollen 

 about its middle, the swelling being marked off from the elevated 

 anterior border and posterioi- portion by broad constrictions. 

 The tegminal and wing rudiments lie very closely adpressed 

 to the body and do not disturb the even contour of the dorsal 

 aspect. The abdomen, though hardly so bottle-shaped as are 

 the elytra and abdomen of the model, is not widely difierent in 

 appearance, and the intersegmental membranes ai'e quite con- 

 cealed except on the ventral surface, where the scuta are small, 

 as is usual in this group of insects. 



The model is so common and so well known a species that it is 

 unnecessary to describe its general appearance ; the above brief 

 description of its mimic will suffice to show in how many super- 

 ficial points the two insects agree, and superficiality of resem- 

 blance is the key-note of mimicry. 



Another specimen of this mimetic Locustid of the same size was 

 obtained a few months later in the same locality ; and both these 



