1902.] SriDERS FROM BORNEO AXD SINGAPORE. 235 



and though the markmgs do not corresjDond 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 oi-ange fascia about the middle, corresponding 

 to a broad orange spot in a similar position on each elytron of 

 the beetle. The legs a,re banded with orange and black (compare 

 Plate XIX. figs. 7 (fe 8). The mimic is met with amongst herbage in 

 jungle, and all the examples of the somewhat common " Bombar- 

 dier " 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. IsTov. gen., nov. sp. vicinissima GammaroteUigi. 

 Plate XXIII. fig. 34. 

 Model. Coccinellidce. Plate XXIII. 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 tibise 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. Garia dilatata 

 (Fab.), was most striking (compare Plate XXIII. 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 con- 

 spicuous 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 oif 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 Coccinellid. 



I have to thank the distinguished orthopterist Brunner v. 

 Wattenwyl for reporting on this Locustid and the Gryllacris. 



II. NEUEOPTEEA AS MIMICS. 



i. Mimic. Mantispa simulatrix (McLachl.). Plate XIX. fig. 23. 

 Model. Bracon sp. Plate XIX. fig. 22. 



This case offers an instance of the distastefulness of the 

 Hymenoptera Parasitica, a group mimicked also by insects 



