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Show 1 9 0 2 . ] SPIDERS FROM BORNEO AND SINGAPORE. 2 3 5 and though the markings do not correspond accurately with those of the model, a general resemblance is produced. The head is orange, the prothorax is black with large orange blotches, the tegmina are black with an orange spot at the base of each, corresponding to a similar spot at the base of each elytron of the beetle, and with an orange fascia about the middle, corresponding to a broad orange spot in a similar position on each elytron of the beetle. The legs are banded with orange and black (compare Plate X IX . figs. 7 & 8). The mimic is met with amongst herbage in jungle, and all the examples of the somewhat common " Bombardier " that I have met with were taken in the same environment. The powerful jaws of the larger Gryllacrides furnish possibly an efficient protection against the attacks of vertebrate enemies, such as small birds, lizards, and frogs, but in so small a species as this the resemblance to a beetle capable of discharging a scorching jet of formic acid vapour must be a far more efficient means of protection. iv. Mimic. Nov. gen., nov. sp. vicinissima Gammarotettigi. Plate X X III. fig. 34. Model. Coccinellidce. Plate X X III. fig. 30. In February 1901 the Museum collectors brought in a small Locustid of a brilliant vermilion colour spotted with black. When the insect was resting the head was bent downwards and almost concealed by the large prothoracic shield, the abdomen was strongly curved downwards and the legs were drawn close up to the body, the long hind tibiae being bent up under their femora: in this attitude the resemblance of the insect to a black • spotted red " ladybird " of a convex shape, e. g. Garici dilatata (Fab.), was most striking (compare Plate X X III. figs. 30 & 34). The eyes are intense black; the large prothoracic shield has three black spots, one central, the others lateral; the segments of the abdomen bear each a small dorsal black spot, decreasing in size posteriorly ; the fore- and mid-femora bear outwardly one conspicuous spot, whilst the hind-femora have two such spots. When touched, this little Locustid did not leap away, as might have been expected, but kept perfectly still, and if further irritated it simply rolled off the surface on which it was resting and assumed a death-like attitude on the ground below, thus simulating very perfectly the habits of a Goccmellid. I have to thank the distinguished ortliopterist Brunner v. Wattenwyl for reporting on this Locustid and the Gryllacris. II. NEURQPTERA AS MIMICS. i. Mimic. Mantispa simulatrix (McLachl.). Plate XIX. fig. 23. Model. Bracoyi sp. Plate X IX . fig. 22. This case offers an instance of the distastefulness of the Hymenoptera Parasitica, a group mimicked also by insects |