348 Annals Entomological Society of America [Vol. V, 



Abdomen: Tergiim, segment one dark brown, indistinctly black 

 medially; remaining segments reddish-brown, darker basally. Hypo- 

 pygitmi swollen. Sternum browoiish-yellow; 7th segment black both on 

 the stemite and pleurite. Hypopygium: (see Fig. o); 7th stemite, 

 caudal margin almost straight; lateral margin impressed, wavy; 7th 

 tergite, caudal margin straight; Sth stemite, (Ss), broad at the base, 

 narrowed apieally, running caudad slightly beyond the remaining 

 appendages; the base is shin^^ the tip short-cylindrical, dull, opaque; 

 the tip bent strongly dorsad and deeply notched at its base; the 

 dorsal surface of the eighth stemite is deeply concave, hollowed-out ; at 

 the notch, on the dorsal margin, is a small flattened lobe (c), directed 

 upward, its caudal margin narrowly chitinized, the tip densely fringed 

 with long pale hairs. Sth tergite very narrow (<St.) represented only by 

 a narrow strip, concave on its caudal margin and consequently even 

 more reduced on the middle line. 9th stemite (9s) broad basally, the 

 dorsal margin with a broad, obtuse notch; a blunt tooth on its caudal 

 margin, ventrally the margin is rolled inward, forming a broad, obtuse 

 notch on the margin; the inward-projecting ann is chitinized, its inner 

 margin thinned and bearing a dense fringe of long pale hairs which 

 overlap those of the opposite side and form a dense mat imder the 

 apical appendage and over the Sth sternite. 9th tergite (9t) moderate, 

 medially with a deep notch on the caudal margin; the adjacent lobes 

 being sharply pointed, bent ventrad at their tips, sub-chitinized and with 

 hairs and minute denticulae along the inner face; the latero-caudal 

 margin of this sclerite is thinner and bears a fringe of sub-equal, pale 

 hairs. The apical appendage (a) is dorsal, flattened, bearing two teeth, 

 the most dorsal and innermost project inward, very sharp, slender, 

 chitinized, almost touching its fellow on the middle line; the ventral 

 tooth (a) longer, directed more caudad; the outer margin of this 

 appendage clothed with long hairs; below the apical appendage, a 

 flattened median organ (b), its caudal margin vertical, evenly convex, 

 narrowly chitinized, and fringed with fine hairs. Below the 9th tergite 

 and between its amis, in the specimen at hand, the penis (p.) projects; 

 it is extremely elongated and if straightened would be considerably 

 longer than one-half of the abdomen. 



9 Like the cf but the antennas short, the flagellar segments cylindri- 

 cal, subequal, not swollen basally, basal half of each segment browTi, apex 

 yellow. Wing without a spur, but venation as in the cT. Ovipositor: 

 (v, Vi) Sth tergite, concave on the caudal margin; 9th tergite \'ery nar- 

 row and not as wide as the rest of the abdomen, its caudal margin con- 

 cave. Base of the ovipositor short, almost as broad as long, the N'alves 

 short, their tips chitinized and sub-spa tula te, viewed from the side 

 (vi), the valve is wider than its base narrowed near the tip, the tip again 

 expanded ; lower valve shorter than the upper, directed caudad and up- 

 ward, the valves extremely high, blunt at the apex. The 9th stemite is 

 very long. 



Holotype, cT, Chapada, Matto Grosso, Brazil (H. H. 

 Smith, coll.) 



