genera and species of the group of Psyllidce. 467 



Thorax: pronotum angustum, adlaterautrinquefoveatum. 

 Mesonotum convexum, apud elytrorum insertionem latis- 

 simum. Elytra elongata, apice acuta ; stigma et radius 

 perbrevia ; cubiti petiolus brevis ; furcse superioris 

 brachium elongatum, area inter ramos amplissima ; 

 margo dorsalis nervulis binis. Pedes : tibiae posticse 

 denticulo brevi, erasso, hamato, angulari, basi armatae, 

 apice dilatatae, ex parte serrate. 



Head small. Crown, measured down the centre, less 

 than the width between the eyes. Face lobes short, not 

 visible from above. Antennae long, filiform, two basal 

 joints short, stout. Eyes placed on the sides of the 

 head, posteriorly, as seen from above, resting against the 

 inner margin of a triangular or cuneate-shaped plate. 

 Thorax : pronotum narrow, with a fovea on each side 

 near the lateral margins ; mesonotum convex ; greatest 

 breadth across the insertion of the elytra. Elytra elon- 

 gate, acute at the apex ; stigma and radius very short ; 

 cubitus petiole short ; arm of the upper furcation long ; 

 area enclosed between the branches very large ; dorsal 

 margin with two nervelets. Legs : tibiae, 3rd pair 

 with a short, stout, curved, angular tooth at the base ; 

 apex dilated, partially serrated. 



Carsidara marginalis. (PI. XIX., figs. 4 — 4/). 



Carsidara margmalis, Walker, Journ. Proc. Linn. Soc, 

 vol. x., p. 329. 



Fusca, subrufescens. Caput : vertex haud deflexus, 

 sordide flavus, pilis subtillisimis longis vestitus ; longi- 

 tudo ejus media dimidio oculorum intervallo brevior; 

 margines postice et ad latera disco interno altiores ; 

 margo posticus angulatus ; margo anterior incisuris 

 tribus angularibus, quarum media maxima, laterales 

 supra antennarum basin sitae sunt, et cum marginum 

 lateralium. apicibus angulos fingunt externos, ante oculos 

 utrinque in callum parvum productos, a latere faciliores 

 visu; discus medio bis depressus, canalicula fusca, in- 

 cisurarum lateralium apicibus terminata, in longitudinem 

 definitus. Lobi faciales pallide flavi, breves, apice 

 rotundati, desuper occulti, pilis longis termibus vestiti. 

 Antennae flavae, longae, filiformes ; articuli primus et 

 secundus crassi ; primus fere cylindricus, secundo plus 

 duplo longior ; tertius quarto paulo longior ; quartus, 



TRANS. ENT. SOC. 1882. PART III. (SEPT.) 3 P 



