14^ CATALOGUE OF 



Female. Black, fusiform, smooth, sinning. Head extending very 

 little beyond the prothorax ; sockets of the antennje, fore border, eyes and 

 palpi testaceous. Eyes nearly connected. Antenna? reddish. Prothorax 

 and fore wings with slightly gilded cinereous tomentum. Prothorax 

 transversely siibelliptical ; fore border much more curved than the hind 

 border, which is slij>htly rounded and is indistinctly angular on each side. 

 Mesolhdrax, metathorax and dorsum of the abdomen tawny, the latter 

 with black bands on the fore borders of the third, fourth, fifth and 

 sixth segments. Hind angles of the fifth, sixth and seventh abdo- 

 minal segments accutely elongated ; supra-anal lamina slightly keeled, 

 notched at the tip, pubescent along each side. Ccrci reddish, long, 

 lanceolate. Legs dark reddish, robust, moderately long ; femora slightly 

 ridged, armed with strong spines ; arolia large. Wings extending beyond 

 the abdomen. Fore wings coriaceous, ferruginous towards the tips, the 

 ferruginous hue paler in the right wing, and extending along the whole of 

 the hind border ; a few of the longitudinal veins or discoidal sectors forked ; 

 intermediate longitudinal veins indistinct. Hind wings cinereous, mem- 

 branaceous, ferruginous and semicoriaceons along the costa ; veins lawny; 

 discoidal area with a ferruginous tinge; two discoidal sectors forked: 

 transverse sectors in the anal area white. Length of the body 14 lines; 

 of the wings 34 lines. 



It differs from iV. crassicornis in the colour of the legs, and the 

 entirely black prothorax will distinguish it from N. Dniryi, N. holosoricea, 

 N. latipennis, N. Mexicana and N. obscura, to which last species it has 

 most affinity. 



o. Demerara. From Mr. Bower's collection. 



9. Nyctibora stygia. 



Mas. Nigra, fusifurmis, suhauralo tomenlosa ; caput subpunctalum, 

 prothoracem paullo superans, margine antico palpisque ferrugineis ; 

 anlenncE saturate rufce, basi niyrie ; prothorax productus, lateribus 

 ferrugineis ; ventris latera saturate rufa ; pedes breviusculi, coxis 

 femoribusque saturate rvjis ; alee anticce ferruginew, area anali 

 nigra. Foera. — Aptera. 



Male. Black, fusiform, smooth, shining. Head extending a little be- 

 yond the prothorax, thinly and finely punctured; sockets of the antennae, fore 

 border and palpi ferruginous. Eyes piceous, approximate. Antennas dark 

 red, black towards the base. Prothorax, sides of the abdomen beneath and 

 fore wings with slightly gilded tomentum. Prothorax much more arched 

 in front than that of N. caliginosa; sides ferruginous; hind border hardly 

 rounded. Abdomen beneath dark red along each side ; hind angles of the 

 hinder segments elongated, acute ; styles short. Cerci thick, lanceolate. 

 Legs robust, rather short; coxa? and femora mostly dark red, tlie latter 

 with stout spines; arolia lar^e. Wings extending somewhat beyond the 

 abdomen. Fore wings ferruginous and coriaceous; anal area, vvhiuh is 

 black, corneous; disk adjoining the anal area piceous. Hind wings 

 ferruginous, membranaceous. Length of the body 15 lines; of the wings 

 30 lines. Female. — Black, covered above with slightly gilded tomentum. 

 Head with a testaceous dot on each side by the socket of the antennie. 

 Sides of the thorax and of the abdominal dorsum ferruginous. Hind angles 



