2o8 
Psyche 
[September 
ing most of the way across the segment, which has a subtruncate apex. 
Tergum 8 flattened, slightly concave longitudinally, 0.41 mm wide, 
with the apex gently rounded, without any indication of a median 
angulation. Surface shiny, finely punctulate and pubescent. Ventral 
sculptured portion flat, with no indication of a median keel. 
Femora moderately stout, widest at apical third. Front femur with 
a deep, slightly margined, roughly circular pit, bearing a few erect 
setae from the middle of its flat and apparently membranous bottom 
(Fig. 6), on anterior portion of the side facing the tibia. Hind femur 
with an elongate pit, which has only the sides elevated ( Fig. 7 ) . Mid- 
dle femur without a pit. Front femur 0.64 X 0.23 mm, front tibia 
0.56 X 0.10, hind femur 0.77 X 0.26. 
The 9 has the pronotum less enlarged, with the sides only slightly 
narrowed behind. The 9 from Colonia Benitez is 3.71 mm long. The 
pronotum is 0.92 mm long, 0.56 wide at base, 0.67 at 0.26 from base, 
0.77 maximum and 0.3 1 at collar. The front margin is only slightly 
higher than the collar and slopes to it; and the disc is almost evenly 
rounded in section. It is only slightly broader than the head, which is 
0.69 mm wide across the eyes. If the elytral length of the holotype 
were made equivalent, its pronotum would be 1.02 mm long and 0.89 
mm in maximum width. The femora of the $ are slightly more slender 
and completely lack the pits of the cf • 
The holotype and most of the paratypes are all brown above, the 
9 from Colonia Benitez rufescent with the elytra brown, and the 
99 from Mojon de Fierro and Campo del Cielo all pale rufescent. 
Holotype cf • Colonia Benitez, Terr. Chaco, Argentina, 12.XII. 
1948, R. Golbach (Inst. Miguel Lillo). Paratypes: 1 9, same data 
(Inst. Miguel Lillo). 1 cf, 1 9 > Mojon de Fierro, Terr. Formosa, 
Argentina, 25. XII. 1948, R. Golbach (Inst. Miguel Lillo). 1 9 > 
Campo del Cielo, [Prov. Santiago del Estero, Argentina], I.1934, J. 
Bosq (Museo de La Plata). 1 cf , 9 9 > Cuyaba, Matto Grosso, Brasi- 
lien (Chicago Nat. Hist. Mus., from residual collection of Staudinger 
and Bang-Haas). 
References Cited 
Blackwelder, R. E. 
1945. Checklist of the coleopterous insects of Mexico, Central America, 
the West Indies, ,and South America. Part 3. U. S. Nat. Mus. 
Bull. 185 : i-iv, 343-550. 
Bonadona, P. 
1961. Revision des Ischyropalpus Laferte [Col. Anthicidae]. Rev. 
frangaise Entomol. 28: 150-177. 
