June, 1913.] AlDRICH : NORTII AMERICAN SpECIES OF LiSPA. 142 



first joint long and slender, pale at tip; second and third joints of medium 

 and equal length, slender, yellowish-white; fourtli and fifth joints flattened, 

 black, the claws large and divergent ; pulvilli enlarged, snow-white ; middle 

 tibia and tarsus rather dark brown than black, the former with a large bristle 

 below the middle on the front side, and a smaller one above it on the hind 

 side; hind tibia yellowish-brown, darker toward the base, with only two 

 bristles before the apical ones, — these two are on the outer side; the hind 

 tibia is .94 times the length of the hind tarsus ; the latter dark brown ; the 

 hind femur has two large bristles on the under side, before the middle. 

 Wings ordinary, calypters white with pale margin, halteres yellow. Abdomen 

 depressed, mostly shining black above, but with a white pollinose transverse 

 spot on the hind edge at each side on segments i, 2, and 3, which runs over a 

 trifle upon the front edge of the succeeding segment ; also one large bristle on 

 each side of segments 2 and 3, and on the fourth segment a terminal circle of 

 six and a sub-basal lateral pair; hypopygium small and retracted. Length 

 4 mm. 



Female. — Head 2.74 times the width of the front; frontal triangle as 

 usual ; thoracic stripes not distinct ; front tarsi hardly longer than tibiae, plain, 

 the tibia brownish-yellow at base; hind femur with only one moderate bristle 

 below ; middle tibiae brownish, the hind ones reddish-brown, near the base 

 with a darker ring. Length, 5.1 mm. 



Two males and one female, from the type lot: Lawrence, Kans., 

 Tifton, Ga., Opelousas, La. 



A somewhat aberrant species, very well marked. 

 Lispa nasoni Stein. 



Male. — Front wide above, considerably narrowed at the antennae, where 

 the eyes have enlarged facets; head about 3.10 times the narrowest width of 

 front ; orbits yellowish pollinose ; face rapidly widening below, wholly silvery 

 with a yellowish tinge, the sides with small scattering hairs meeting those of 

 the frontal orbit, antennae deep black, a distinct red band at tip of second 

 joint, third joint somewhat elongated ; cheek below eye rather wide ; palpi 

 yellow, gradually widened from the base, the greatest width only about half 

 the length of the third antennal joint, with a few black hairs except on the 

 disk. Thorax cinereous, with a fairly distinct median brown stripe extending 

 to the tip of the scutellum, a less distinct lateral stripe each side, and some 

 indications of another outside this, mostly behind the suture ; four dorso- 

 centrals behind the suture, the anterior two of them smaller than the pos- 

 terior two ; halteres yellow ; calypters white, border very pale. Legs black, 

 the femora rather broadly at tip, and all the tibiae, yellow. Front coxae with 

 only about ten bristles on the front side, — less than in most species ; middle 

 tibia with a medium bristle on the outer front side about the middle, and a 

 small one opposite it on the outer hind side; hind tibia 1.06 times the length 

 of its tarsus, with a medium bristle below the middle on the outer side; hind 

 femur with a short row of only three bristles on the outer side below, ending 



