1902. } SPIDERS FROM BORNEO AND SINGAPORE. 251 
which will devour a single specimen of beetle or butterfly entirely 
for the sake of curiosity, only manifesting disgust or the reverse 
when that curiosity is fully satisfied. 
Of the mimicking species it is not necessary to say much, their 
resemblances to their models being in every case most obvious. 
Amongst the Lamiide, the Phytwciine again yield the majority 
of mimetic species (a newly-discovered Daphisia, yellow in colour, 
is banded with black in almost identically the same manner as 
C.annularis) (compare figs. 34. & 31 on Plate XX.) ; and amongst 
the Cerambycide, the Lepturine are also fruitful in this respect. 
One species of Leptwra, with reddish head and prothorax and 
yellow black-banded elytra, is closely similar to Demonaa mustela 
(compare figs. 40 & 39, Plate XX.): another species allied to 
Leptura histrionica (Pasc.), black with cream-coloured bands, 1s 
not readily distinguishable from Xylotrechus decoratus (compare 
figs. 42 & 41) and one or two species of Demonax. Plate XX. 
and its explanation should be consulted for the representation of 
other examples given in Table III. but not further indicated 
in the text. Polyphida clytoides (Pasc.), Psalanta chalybeata 
(Pase.), and Chlorisanis viridis (Pasc.) I have never seen, but 
good figures of them are published in Pascoe’s paper on the 
Longicornia Malayana (Trans. Ent. Soc. ser. 3, vol. in.), The 
remaining mimics of the iridescent green Callichromine, viz. 
Nos. (4), (10), and (12) in Table III., are shown in figs. 47, 48, 
and 44 on Plate XX. and their models in figs. 45, 46, and 43. 
[The mimetic resemblance to the Clytinw exhibited by so namy 
species of distantly related Bornean Longicorns is of extreme 
interest. The widespread species of this dominant group have 
developed, ina great majority of cases, a black and yellow or black 
and orange transverse banding, which superficially resembles the 
characteristic appearance of wasps and hornets. This rough 
resemblance is further heightened by the active movements of the 
living beetle, which suggest those of a Hymenopterous rather 
than a Coleopterous insect. Such an appearance is found in 
Olytine of many species from the whole Palearctic and Nearctic 
belt, from Mexico, Malaya, Australia, and probably many other 
countries. An Australian species, Arid@us thoracicus (Donovan), 
has the deep brownish-orange colour of the alternate stripes, as well 
as the comparatively few broad black bands which are character- 
istic of wasps from the same region. Clytanthus sex-guttatus 
(Lucas) from Morocco suggests the appearance of a Mutillid or 
perhaps a Clerid with a Mutillid form of colouring. The 
Bornean Selethrus amenus (Gory) mimics the aggressive Coleo- 
pterous Tricondyla (Cicindelide), while species of the 7'illo- 
morphine, allied to the Clytinw, mimic ants, e. g., Muderces 
picipes (Fab.) of N. America and Clytellus westwoodi (Pasc.) of 
Borneo. Thus we witness within the limits of one large group 
of Coleoptera a great development of mimicry of aggressive 
specially protected forms. Such mimicry has been hitherto 
assumed to be Batesian (pseudaposematic), although the dominance 
[23] 
