OF WASHINGTON. 



237 



Found by Mr. Koebele in large numbers in company with the 

 typical form, and also in Los Angeles county, Cal. Three speci 

 mens from the latter locality, collected in May, are without the 

 white powder-like substance on the wings and the transverse 

 rugce are as plain as in the typical form. 



Type. No. 8144, U. S. National Museum. 



Euphyllura arbuti, n. sp. 



Length 2.6mm. Above yellowish red, sometimes with a tinge of 

 brown, genital segment, underside and legs honey-yellow, wings bi- 

 colored. Head large, strongly obliquely deflexed, more or less shining, 

 finely rugose, posterior edge slightly emarginate, vertex at middle slightly 

 shorter than half its width at base, posterior part flat, genje prominent, 

 discal impressions deep, subtransverse, smooth at bottom, vertex in front 

 of them distinctly convex, causing the frontal lobes to appear to be de 

 pressed below the level of the 

 vertex and to be separated there 

 from ; frontal lobes usually pale 

 yellow, a little shorter than in 

 the preceding species, antennae 

 a little longer than in the pre 

 ceding, pale yellow, dusky at tip. 



Surface of thorax subopaque, 

 finely and obsoletely alutaceous, 

 without distinct markings, mid 

 dle of dorsulum and mesono- 

 tum usually darker; pronotum 

 strongly ascending, lateral im 

 pressions very conspicuous ; dor 

 sulum also strongly ascending, larger than in the preceding, front and 

 hind margins equally arched; mesonotum at middle slightly convex lon 

 gitudinally. 



Wings less suddenlv widened at base, a little more rounded at apex, and 

 therefore less rhomboidal than in the preceding; surface very little shin 

 ing, transversely rugose between the veins, rugae and interstices finely 

 rugose, radial cell, the larger portion of discoidal cell, posterior basal cell 

 and clavus pale yellow and tolerably transparent, the rest of the wing 

 brown and hardly transparent. At the apical portion of the wing the two 

 colors are not sharply divided. Cubitus a little longer than discoidal part 

 of subcosta, both strongly prominent, straight, radial part of subcosta as 

 long as discoidal part and becoming nearly obsolete at apex; no ptero- 

 stigma; radius fine, strongly undulated and running into anterior costa; 

 stem of first fork shorter than the cubitus, stem of second fork as long as 

 cubitus ; first furcal extremely short, terminating nearly perpendicularly 

 upon the costa, second furcal three or four times longer than the first, 

 gently curved and terminating obliquelv upon the costa, third and fourth 



FIG 7. E-nphyllura arln<ti. 



