74 3IK. F. F. LAIDLAW ON 



The following brief chai'acterisation of the known species of 

 Amphicnemis may be useful : — 



A median posterior prothoracic spine present in both sexes. 



Spine similar in both sexes ; upper surface oi: thorax of female without 



metallic colouring. A. louisa, sp. n. Borneo. 



Spine in female longer than in the male; thorax above with golden 

 . bronze marking. A. gracilis* Krv-gev. Sumatra. 



Prothoracic spine in male only. 



Large species (abdomen $ 45 mm.) ; thorax of female with metallic 

 band above, and with marked lateral projections to posterior margin 

 of prothorax. A. lestoides ^r&xxeY^. Mindanao. 



Smaller- species (abdomen <? 36 mm.) ; thorax of female entirely 

 blood-red. A. wallacei Selys. Borneo. 



No prothoracic spine in males. 



Bterostigmata of hind wings orange-yellow in male ; colouring of 

 female similar to that of male, also without prothoracic spine ; small 

 species (abdomen $ 32 mm.). A. martini Ris. Borneo. 



Pterostigmata of hind wings of male grey or black ; small species 

 ( $ abdomen 34 mm.), ? unknown. A. remiger Laidlaw. Borneo. 



Pterostigmata of hind wings of male grey ; large species ( $ abdomen 

 41 mm.) ; female coloured very much like the male. No prothoracic 

 projections. A. ecornuta Selj's J. Sumatra. 



Lastly, A.furcata Brauer § from Luzon has no median spine 

 but a lateral pair in the male, whilst the pterostigmata are all 

 black ; A. madelence, sp. n., from Borneo, has the pterostigmata of 

 the hind wings orange-yellow, and a long cylindrical median 

 prothoracic spine in the male ; in both species the female is 

 unknown. 



Legion PROTONEURA. 



Genus Disparoneura Selys, Ris emend. || 



Lower lip with short rounded lobes ; pterostigma rhomboidal 

 or lozenge-shaped ; lower section of triangle present as a vestige 

 or absent. No supplementary basal postcostal nerve. Basal 

 postcostal lying betiveen the level of the antenodal nerves. 



The genus so defined ranges from the Cape of Good Hope 

 through Tropical Africa to India, Ceylon, Burmah, and the Malay 

 Peninsula and Great Malay Islands. It appears to show advancing 

 specialisation from west to east both as I'egards colour and venation 

 characters, reaching its maximum in Borneo, east of which island 

 its occurrence is doubtful. [Two species described by de Selys 

 as belonging to the genus Alloneura, from the Philippine Islands, 

 were subsequently referred to Dis2K(ro7ieiira by him, but as in his 

 description no special reference is made to the position of the 

 basal postcostal nerve, which is the character used here to 

 distinguish the two genera, and as I have not been able to 

 examine examples of these two species, their exact position I 



* Kriiger, Stett. Ent. Zeit. 1898, pp. 121-123. 



t Brauer, Verb, zool.-botan. Gesell. Wien, 1868. 



X De Selys, Ann. del Mas. Civ. di Geneva (2) vii. 1889. Kruger, loo. cit. 



§ Brauer, loc. cit. 



\\ See note at the end of tliis paper. 



