9 8 Z. BOUCEK 



as 44-5 : 29-5, relative width of frons above the indicated emargination of orbits 35, maximum 

 breadth of scrobes 18, eye 29 : 18, malar space 8, width of mouth 24. Clypeus 1-25 times as 

 broad as high, broadly bilobed lower margin with small median tooth; surface of clypeus more 

 distinctly and more coarsely vertically rugulose than lower face on sides; relative distance 

 between lower clypeal margin and antennal toruli 22. Mandibles with slender lower tooth 

 separated by deep semicircular gap from upper subtruncate edge. Scapus ventrally about 

 2-4 times as long as broad, relative length 13. Flagellum plus pedicellus combined about 1-34 

 times as long as breadth of head, moderately clavate, clava nearly twice as broad as pedicellus; 

 first flagellar segment about 1-3 times as long as broad, fifth and sixth subquadrate, eighth 

 about 0-9 times as long as broad; clava subacuminate, twice as long as broad. 



Puncturation on thorax very dense and transversely confluent, on scutellum more polygonal, 

 interspaces extremely narrow, without microsculpture ; pubescence extremely short. Pronotum 

 without carinae, hind margin also not carinate ; sides in dorsal view slightly converging and in 

 middle distinctly emarginate, surface along median line flat; lateral panel flattened, its lower 

 corner broadly rounded, obtuse-angular posteriorly. Mesoscutum not depressed posteriorly; 

 vestiges of parapsidal furrows as long as their distance from lateral margin. Broad part of 

 tegula smooth. Scutellum 1-15 times as broad as long, apical margin not set off, apex broadly 

 rounded; sides with dense short hairs. Dorsellum about 3 times as broad as long medially, 

 margined with narrow upturned lamina; surface flat, densely finely punctured and covered 

 with thick argenteous subdecumbent hairs directed towards sides. Propodeum medially half 

 as long as scutellum, median carina and plicae fine but distinct, surface densely pubescent; 

 hairs white, on median area posteriorly directed laterad, anteriorly directed forwards. Femoral 

 depression of mesopleurum fairly deep; upper mesepimerum coarsely punctured, broad inter- 

 spaces smooth. Upper edges of fore femur and tibia rounded. Hind coxa in depression with 

 a smooth streak not reaching basal fifth, otherwise at lateral edge and at dorsal edge anteriorly 

 extremely densely punctured, short hairs below the streak directed downwards; dorsal edge 

 with dense short pubescence, posteriorly with a short but not extremely thin dorsal lobe. Hind 

 femur flattened, unusually narrow, rather irregularly coarsely punctured with intermixed finer 

 punctures, interspaces generally as broad as punctures; basal tooth situated in middle, narrow, 

 followed by unequal small teeth about 8 in number. Hind tibia externally with very sparse 

 coarse punctures and some interspersed fine punctures on broad interspaces (Text-fig. 113); 

 apex subtruncate, outer spur stout, conical. 



Gaster about as long as head plus thorax combined, about 2-5 times as long as broad, very 

 slightly narrowed at fourth tergite. Pubescence anteriorly short, on fourth and following 

 tergites double, with sparse outstanding longish hairs and very dense short subdecumbent 

 stoutish hairs appearing argenteous. Dorsum smoothly convex in profile. First tergite about 

 1*1 times as long as broad, fairly densely punctured with a smooth narrow median groove; third 

 tergite with median depression, submedially punctures crowded in about 7 transverse rows. 

 Fourth and fifth tergite dorsally subequal in length and width, broadly grooved medially, each 

 distinctly transversely depressed before hind margin, hairs just before the depression directed 

 obliquely sideways, in hind part of depression backwards. Sixth tergite and epipygium less 

 densely pubescent than the fifth. Ovipositor sheaths curved along convex dorsum of gaster, 

 its apex acuminate and curved downward, reaching anterior half of first tergite. 



<$. Unknown. 



Biology. Unknown. 

 Distribution. Bolivia, Argentina. 



Holotype $, Argentina: Salta (Steinbach) (BMNH). 



Paratypes. Argentina: Salta, Alemaria, 27.iv.1970, 1 $ (Stange & Porter) 

 (IML, Tucuman). Bolivia: Santa Cruz, 4.VU.1972, 1 $ (Porter) (BMNH). 



This species is unique in having the dorsellum densely covered by subdecumbent 

 white hairs. 



