l^'^^.] SPIDERS FROM BOEXEO AXD SIXGAPOHE. 237 



pubescence is denser at the apices of the segments, formino- here 

 narrow yellow bands ; the wings are flavo-hyaline, sometimes with 

 a brown stigma. 



The mimic is of a reddish hue, the abdomen is a little paler 

 corresponding to the red-brown seen through the golden pubescence 

 of the wasp's abdomen ; the apex of each segment is narrowly 

 banded with yellow. The wings are broadly hyaline along the 

 costal margins and there is a brown stigma. A closely allied 

 species from Celebes is unna,med in the British Museum. 



Both this and the preceding Mantispa were referred to Mr. R. 

 McLachlan, who pronounced them to be undescribed species. 



iv. Mimic. Mantispa ? cora (Newm.). 

 Model. Mesostenus sp. 



A small black-and-yellow banded Mantispa was caught on the 

 hdl, Bukit Timah, at Singapore amongst short undergrowth, and 

 at the same time I took also several specimens of a common 

 Ichneumon-fly verysimilarlycoloured. The xMaj^^isjoa was extremely 

 active on the wing and at first sight almost indistinguishable from 

 its model. I append some colour notes on the two insects : 



Mantisjm.—GvomiA-Qolom: of head, thoi^ax, and abdomen black, 

 the following bands bright yellow— two vertical on the face, one 

 transverse on the vertex, an anterior transverse and three longi- 

 tudinal on the prothorax, one transverse pn both meso- and 

 metathorax, which are ventrally blotched with yellow ; abdomen 

 alternately banded black and yellow. Anterior legs yellow 

 blotched with black, mid- and posterior femora broadly banded 

 black and yellow. Bases of wings yellow and a distinct black 

 stigma on the fore wings, 



Mesostenics sp. — Head yellow ; prothorax black bordered with 

 yellow and with two central yellow stripes ; mesothorax yellow 

 with a central black spot; metathorax posterioidy yellow ; abdomen 

 banded alternately black and yellow. Legs yellow blotched with 

 black. Anterior wings with a conspicuous stigma. 



I subsequently found the same species of Mantispa or a close 

 ally in Borneo, frequenting the blossoms of a Hibiscus ; the plant 

 was also visited in considerable numbers by a small yellow-and- 

 black Icaria and by a similarly coloured ichneumon-fly ; a some- 

 what careful scrutiny was needed to distinguish these insects one 

 from the other. 



III. COLEOPTERA AS MIMICS. 



I wish especially to acknowledge the kind assistance received 

 from Mr. C. J. Gahan in working out this section of my paper. 



Most of my examples are taken from the Longicornia, and I 

 have draAvn up tables of the mimetic species of the group occurring 

 in Borneo. I have made these as complete as possible, but there 

 are a few describe:! species which I have not seen and which have 



