—51— 



characters given above as separating it from Stal's genus. It is cer- 

 tainly a very interesting addition to the Jassid fauna of N. America. 

 The opalescence of the elytra is much more manifest in some exam- 

 ples than in others, but otherwise there seems to be but litUe ten- 

 dency to variability in the species. 



4. Scaphoideus scalaris n. sp. 



Smaller and less robust than S. immistus Say, which it approaches in 

 ornamentation. Pale testaceous, varied witli brown; elytra whitish hyaline, 

 with brown nervures and areolar spots. Length about 5 mm. 



Head narrower than the pronotum, forming an almost regular equilateral 

 triangle, the posterior margin deeply arcuated, vertex horizontal, apex ob- 

 tuse, passage to the front rounded. Front long and narrow, sides nearly 

 rectilinear, a little incurved at the apex. Clypeus narrow, widened at the 

 rounded apex, which moderately surpasses the cheeks. Lora; as wide as the 

 clypeus. Cheeks broad, feebly angled opposite the middle of the lorae, with 

 which they coalesce before reaching the clypeus. Antennae about as in im- 

 mistus. Hind margin of the pronotum straight, latero-posterior margins more 

 oblique than in the allied species, and the lateral angles more prominent. 



Color pale testaceous. Vertex with a transverse brown spot anterior to 

 the middle, behind which a broad whitish shade runs to the hind margin, 

 bisected longitudinally by a fine brown line and obscurely margined with the 

 same color; posterior to this brown mark is a similar, but slightly oblique one 

 on either side of the central whitish line, extending outwardly from its margin 

 nearly to the anterior angle of the eye; anterior margin of the vertex with an 

 angulated brown line, beyond which on the extreme edge are five whitish 

 spots, three on the apex and one adjoining each ocellus, or these may be re- 

 duced to a single arcuated spot each side of the apex. Temples alternated 

 with brown and white. P^ace pale testaceous, embrowned beneath the eyes, 

 front brown, with the central and lateral transverse lines and the margin pale, 

 or pale, with transverse brown lines more or less confluent above. Base of 

 the antennae pale, second joint with a brown ring, setae brown, paler at base. 

 Rostrum pale, tip black; pronotum alternated with brown and cinereous on 

 the anterior margin; disc obscurely irrorate with pale, and with an indistinct 

 pale central line. Scutellum obscurely varied with pale testaceous and cine- 

 reous, sometimes with brown spots on the basal angles. Elytra whitish hya- 

 line, faintly obscured with pale fulvous in about three transverse clouds; ner- 

 vures and the centre of some of the discal areoles on the corium pale brown; 

 two short transverse nervures beyond the apex of the costal area, two others 

 on the sutural margin beyond the tip of the clavus, and the broad apex fus- 

 cous, sutural margin of the clavus with three small fuscous spots, one on its 

 extreme tip and another on the apex of each claval nervure. Wings hyaline, 

 iridescent; nervures fuscous. Beneath pale tescaceous, faintly embrowned 

 on the middle of the pectoral pieces and on the sides of the ventral segments. 

 Tergum fuscous, the incisures and margins pale. Legs soiled white, the lower 

 surface of the femora obscurely clouded with pale brown; tip of the tibiae, 

 the tarsal joints, and a minute point at the base of tlie tibial spines on the 

 posterior feet blackish. 



