Mr. F. Walker on undescribed Species of Homoptera. 315 



by the contour and the colour of the species, and by the fore wings, 

 in which the costa and the interior border are excavated or con- 

 tracted. 



L - Massila sicca (PI. XV. f. 2). Cinerea ; caput brevissimum, carinatum, 

 frontis margine facieni versus dilatata; prothorax bisulcatus, antice 

 truncato-conicus ; ate anticse sat angustse, apice rotundatse, punctis 

 nonnullis vittisque duabus obliquis indeterminatis connexis nigris aut 

 fuscis, marginibus tuberculatis, costa margineque interiore basi convexis 

 extus concavis, margine exteriore subconvexo. 



Cinereous. Head very short ; vertex keeled ; front broader than 

 long, keeled in the middle, the rim on each side dilated towards the 

 face. Prothorax truncate-conical in front, slightly concave behind, 

 with two furrows which are united hindward. Legs whitish. Fore 

 wings rather narrow, with some black or brown points, and with two 

 irregular oblique connected black or brown stripes ; costa and exterior 

 border forming a rounded right angle ; costa convex towards the base, 

 concave exteriorly ; exterior border and interior border tuberculate, the 

 former slightly convex ; interior border dilated near the base, excavated 

 in the middle part, slightly angular towards the tip ; veins hardly 

 ramifying ; transverse veinlets numerous, irregular. Length of the 

 body l-2i- lines ; of the wings 7-8 lines. 

 Sydney and Moreton Bay. 



Massila unicolok. Mas. Viridescenti-alba ; caput brevissimum ; frons 

 carinata, marginata, latitudine longior ; prothorax antice convexus ; 

 alae anticee sat latae, apice quadratse, margine interiore basi tuberculato. 



Male. Greenish white. Head very short ; front longer than broad, 

 keeled in the middle, the rim on each side dilated towards the face. 

 Prothorax convex in front, straight behind. Fore wings moderately 

 broad, quadrate at the tips; costa slightly convex towards the base, 

 slightly concave exteriorly; interior border straight, tuberculate for 

 more than half the length from the base. Length of the body 2£ lines ; 

 of the wings 8 lines. 



Moreton Bay. 



Genus Omolon. 



Fcem. Corpus breve, latum, robustum. Caput transversum ; vertex 

 trigonus, sulco antice furcato ; frons minima. Thorax altissimus, 

 carinatus, spinis tribus posticis robustis acutis subarcuatis armatus. 

 Ala? anticee apice rotundatse, costa subconvexa, venis venulisque paucis. 



Female. Body short, broad, stout. Head transverse, a little narrower 

 than the thorax ; vertex triangular, acute in front, with a furrow which 

 is forked in front ; front oblique, very small. Mouth extending a little 

 beyond the base of the fore legs. Thorax with a high punctured 

 shield, forming an acute edge, but not extending to the tip of the ab- 

 domen, nor concealing the wings ; its hind part terminating in three 

 long stout acute slightly curved spines, of which the middle one is 



