PROTECTIVE RESEMBLANCE, 23 
fasciatipennis Waterh. 1885 (Coloborhombus). N. Borneo. 
auricomus Rits. 1890 (Coloborhombus). Java. 
B. Species with elongate narrow elytra. 
tibialis Rits. 1895 (Aphrodisium). Assam. 
intermedius Gahan, 1902 (Nothopeus). Borneo. 
Of two of these species, and moreover of an unnamed 
one from Borneo, the mimetic properties have been obser- 
ved in the field by insect collectors (Messrs. Pryer and 
Shelford). 
In a paper, entitled »Observations on some Mimetic In- 
sects and Spiders from Borneo and Singapore” and pu- 
blished in the Proc. Zool. Soc. London, 1902 II, pp. 280— 
284, plates XIX—XXIII, the author, Mr. R. Shelford, says 
(pp. 240 and 241) concerning Nothopeus-species mimicking 
Hymenoptera: 
» Nothopeus fasciatipennis (C. O. Waterh.) has already 
been figured and described!). Nothopeus sp. near hemipterus 
(Fabr.) is a large black species with entirely fuscous wings 
and is an admirable mimic of a formidable wasp, Mygnimia 
anthracinus (Sm.), which occurs commonly on Mt. Matang. 
The buzzing flight and other movements of these two Nothopez 
are remarkable wasp-like and so completely deceived the 
Museum collectors that they employed the greatest precau- 
tions in transferring the specimens from the net to the 
killing-bottle.” 
»A magnificent new species, described and figured by 
Mr. Gahan loe. cit. as Nothopeus intermedius, was captured 
near the summit of Mt. Penrissen together with several 
of its models, Salius aurosericeus (Guér.). When seized, 
this beetle curved down its abdomen in the most charac- 
teristic wasp-like manner, and it was only with the great- 
1) Trans. Ent. Soc. London, 1885, p. 369, pl. X, fig. 12. — On p. 372 
Mr. Pryer says: »The wasp (Mygnimia aviculus Sauss.) or beetle (Coloborhom- 
bus fasciatipennis Waterh.) is abundant, but difficult to capture; when flying 
or on the ground at a distance of six feet it is quite impossible to distin- 
guish the wasp from the beetle, and I cannot therefore say which is most 
common, as I only succeeded in securing a single specimen of each.” 
Notes from the Leyden Museum, Vol. XXXIV. 
