1802. J 107 



With his usual kindness, Mr. E. Newstead has mounted and 

 drawn to the same scale both the antennae and legs. 



153, Lewisham Koad, S.E. : 

 July, 1891. 



ON AN INDIAN ANT-MIMICKING HEMIPTERON. 

 BY E. BEEaEOTH, M.D. 



At the meeting of the Entomological Society of London, of July 

 1st, 1891, Eev. Canon Fowler exhibited specimens of a bug living with 

 and imitating an Indian ant, Polyrrhachis spiniger, Mayr. Mr. R. C. 

 Wroughton, of Poena, having sent me specimens of this bug, I find 

 that it belongs to the family Goreidcd, sub-family Alydince, division 

 Micrelytrarin, genus Didichiits, Stal, a genus hitherto known only from 

 South Africa. The species being new, I describe it here. It has, 

 indeed, a most striking resemblance to the PoJyrrhacJiis, of which 

 Prof. Forel had the kindness to send me a specimen. Mr. Wroughton 

 has only found the brachypterous form. If the species has a ma- 

 cropterous form, it is probable that this form has no or little 

 resemblance to an ant. 



No nearer particulars on the habits of the bug are known, but I 

 think it is a foe to the ant. It can attack the ant without great risk, 

 having an excessively strong chitinous harness. 



BULICHIUS WEOUaHTONI, n. sp. 



Forma brachi/ptera : — Niger, nitidus, dense punctatuis, antennis (articulo prirao 

 excepto) picinis, eoris apice albescente, articulis duobus primis tarsorum obscure 

 testaceis. Spinse laterales pronoti fissse. Spina scutellaris suberecta, spin is thora- 

 cicis longior. Corium scutello fere duplo longius, fortiter seriatim punetatum, apice 

 oblique truncatum, membrana nulla. Abdomen leviter subsBnescens, subalutaceum, 

 late subovale, basin et apicem versus subsequaliter angustatum, subtus valde con- 

 vexum, supra bullato-fornicatum, connexivo deplanato. Articulus primus tarsorum 

 posticorum articulis duobus ultimis unitis paullo plus quam dimidio longior. 



Long., 8 mm. 



India orientalis : Poona et Nilgherries, D. Wroughton ; Calcutta et Barrackpore, 

 D. Rothney. 



Easily distinguished from D. trispinosus, Stal, the only species hitherto known, 

 by the black colour, the bifid thoracic spines, and the less elongated first joint of the 

 hind tarsi. D. trispinosus is a yellow species, of which only the macropterous form 

 is known. 



Tammerfors, Finland : 



March Ist, 1892. 



K 2 



