PHYGADICIDvE. 225 



Genus 2. NYSIUS, DalL 



(Cat. Hem. ii, 551 (1852.) 

 Long-oval, with nearly parallel sides. 



Head short, broad, across the eyes broader than the front of the 

 pronotum ; Crown subquadrate, convex, at each side in front 

 curved down vertically, ending in a short, obtuse antenniferous 

 process ; Face curved in a line with the crown, nearly vertical . 

 central lobe prominent, narrow, obtuse ; side lobes shorter than the 

 middle lobe, broad at the base, apex acute, outer margin concave. 

 Antenna ; 1st joint stout, reaching a little beyond the end of the 

 face ; 2nd and 3rd thin ; 2nd twice as long as the 1st ; 3rd not quite 

 so long as the 2nd ; 4th as long as, and thicker than the 3rd, but not 

 so thick as the 1st. Eyes large, semi-globose, prominent beyond 

 the anterior angles of the pronotum. Ocelli large, distant. Ros- 

 trum reaching over the metasternum; basal joint not so long as the 

 head, lying in a channel of which the sides are raised. 



Thorax. Pronotum broad, trapezoidal ; on the 1st 3rd a narrow, 

 linear, transverse, smooth incision which does not reach the lateral 

 margins ; sides a little constricted in front and at the middle ; posterior 

 margin nearly straight ; hinder angles obtuse, raised into a callus ; 

 disk posteriorly convex. Scutellum large, triangular, convex ; base 

 in the middle with a deep transverse impression ; disk with a 

 strong longitudinal keel. Elytra; Clavus deflected to the corium, 

 narrow, without a middle nerve ; Corium ; anterior margin reflexed, 

 except at the base; posterior margin thick, and strongly curved 

 from the end of the clavus to the end of the inner nerve, thence 

 sinuate to the apex ; disk slightly convex, almost horizontal next the 

 clavus. Membrane with a strong depression along the base, nerves 

 (5) straight ; the 3rd, 4th, and 5th connected beyond the base by a 

 cross nerve forming 2 cells. Sternum ; Mesosternum in the centre 

 with a deep rostral channel ; scyphus triangular ; Metasternum 

 convex, hindwardly compressed and margined ; between the 2nd 

 and 3rd pairs of coxse the 2 orifices of the odoriferous organ developed 

 into convoluted projecting processes ; on all the segments the plates 

 form sheaths round the base of the coxae. Legs; thighs stout, 

 narrower at the base and apex, unarmed ; tarsi long ; 1st joint on 



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