-78- 



spots on the front of the vertex, and the basal angles of the scutellum black. 

 Length: male, 4 mm.; female, 5 mm. 



Head as wide as the pronotum, female; or a very little wider, male; ob- 

 tusely rounded before. Verte.x narrow, the fore and hind margins almost 

 parallel; surface sloping anteriorly, passage to the front well rounded. Front 

 rather wide; sutures above the antennae parallel, below converging to the 

 clypeus. Clypeus long and narrow, the rounded apex exceeding slightly the 

 cheeks. Lora; narrow, somewhat elongated. Cheeks narrow, sides feebly 

 angled just below the eye; first two joints of the antenna? thick, poorly dis- 

 tinguished, the first much narrowed at base. Legs: first joint of the anterior 

 tarsi broad, of the posterior somewhat elongated. Posterior margin of the 

 pronotum almost straight, lateral angles rounded. Neuration of the elytra 

 as in our other species of Thamnofeitix, except that the transverse nervure 

 connecting the first and second sectors runs obliquely forward and inward. 



Color: Male.— Head pale yellow; vertex tinged with fulvous against the 

 eyes, and with a fulvous spot at the apex; immediately above each ocellus is 

 a large, round, black dot; sutures of the front and clypeus from the antennae 

 to the tip of the lors heavily lined with black; front above with two triangular 

 brown spots converging to a fulvous point on the tip of the vertex,, and di- 

 verging below, where they are interrupted by some pale, transverse, broken 

 lines. Eyes and antennal setce brown. Pronotum whitish testaceous, with 

 a transverse, fulvous brown band within the posterior margin, interrupted at 

 the middle by a longitudinal white line, which is broadly bordered with brown, 

 especially on the anterior margin. Scutellum pale yellow, with an oval black 

 spot within the basal angles. Elytra fulvous brown; costal half of the corium 

 hyaline almost to the apex; nervures slender, white, except at the apex, and 

 broadly bordered with the same color on the clavus and inner half of the 

 corium. Wings hyaline, smoky toward the tip, nervures thick, brown; pec- 

 toral pieces white, edged with black; sternum black. Legs white, base of all 

 the spines with dark brown points; joints of the posterior tarsi embrowned 

 beneath toward their apex; tip of the rostrum and the pulvilli black. Ab- 

 domen black; connexivum, disc of the venter and genitalia white. 



Female.— Obscure pale yellow, elytra whitish; markings as in the male, 

 but paler; face immaculate, or with faint indications of the superior brown 

 spots; cheeks with a dusky cloud below the eye; black spots on the vertex 

 distinct; fulvous markings on the pronotum more extended along the anterior 

 margin. Abdomen and all beneath soiled white, immaculate or nearly so. 

 Wings white, slightly iridescent, nervures inconspicuous. 



Genital pieces.— Male: valve broad, occupying the concavity of the hind 

 margin of the ultimate ventral segment, its posterior edge feebly convex; 

 plates broad, triangular, sides slightly convex, apex obtuse, edge fringed with 

 stout bristles. 



Female.— Last ventral segment long, the edge nearly straight, with a 

 minute central notch; pygofers short and broad, apex truncate, the apical 

 submargin with a single row of stout spines, the sutural margin with a few 

 short ones scattered along nearly its whole length. Ovipositor slightly ex- 

 ceeding the pygofers. 



Described from one male (No. 626) and two female (No. 331) 

 examples. This species is somewhat anomalous in the genus in 



