ZOOLOGICAL NOTES ON COLLECTING IN BORNEO. 421 



mountain species described by Shelford as Pseudothyrsocera 

 bicolor, an apparently allied species, brick-red and black in 

 colouring, new to our collection, the big chestnut-brown Epi- 

 lampra goliath, Shelford, which measures over 2£ in. in length, 

 and two more examples of an Epilamprine new to the Museum. 



The common little Pseudophyllodromia pidcherrima, Shelford, 

 was noted on tree-trunks on the path up from our camp, but not 

 above 1000 ft. 



The Hymenoptera did not get the attention they deserved, 

 in fact, only the more obvious were annexed. Of these, 

 the big black Salius princeps, Smith, with conspicuous white 

 subapical band, comes first. I noticed one run under a log, 

 possibly to take shelter from a storm just then beginning ; it 

 was a fearsome object, and well worth mimicking for protection. 

 This species has orange-coloured antennae, but another occurs in 

 Sarawak with black antennae. Mr. Meade-Waldo kindly identi- 

 fies this as Salius ducalis, Smith. The extraordinary Longicorn 

 (Cerambycid) Nothopeus fasciatipennis, Waterh., figured by 

 Pryer and described by Waterhouse,* Wallace, t and Shelford,! 

 is a better mimic of this latter species, though no doubt both 

 serve as a model of this conspicuous warning pattern. Two 

 more fairly common species of Salius — quite different in appear- 

 ance to S. aviculus — serve as models for two other species of 

 Nothopeus ; these are S. anthracinus, Sm., a transparent black- 

 winged species, mimicked by N. sp. nr. hemipterus, Fab., and 

 the golden-winged S. aureosericeus, Guer., which is mimicked 

 by N. intermedius, Gahan. 



The Batesian theory of mimicry demands that the model 

 should be plentiful, the mimic scarce. Twenty years' collecting 

 in Sarawak has produced a good series of each of the three 

 Hymenopterous models, but of the Coleopterous mimics only a 

 single specimen of N. Jasciatipennis, a pair of N. sp. nr. hemi- 

 pterus and a single specimen of N, intermedius. On this 



* Trans. Ent. Soc. Lond. 1885, p. 369, pi. x. (Coloborhombus). 



| 'World of Life,' 1911, p. 157, fig. 23. "As one rather extreme 

 example of mimicry I give the figure of a black wasp with white-banded 

 wings, which is closely imitated by a heteromerous beetle. These I captured 

 myself in the Forest of Borneo, flying together near the ground." 



| Proc. Zool. Soc. Lond. 1902, pp. 239-241. 



