1976] 
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191 
pelma agrees with numerous other north Argentine humid forest 
insect genera, such as the ichneumonids Epirhyssa, Acrotaphus, 
Rhinium, Tretobasis, Megajoppa, Cryptojoppa, and Macrojoppa, 
the lepidopterous Morpho, and the pseudostigmatid zygopteron 
Mecistogaster, which enter Argentina only in the northwest and 
northeast, where they often are represented by closely allied or 
identical species. Evidently in the not distant past, perhaps during 
a Pleistocene glacial maximum, conditions were wetter than at 
present and humid forest biota ranged uniformly across the north 
of Argentina. 
Acknowledgements 
The holotype of S. argentinum was collected during fieldwork 
subsidized by the author’s current U. S. National Science Founda- 
tion Grant (DEB 75-22426). I obtained the male paratype during 
a visit to the estate of Srs. Pablo, Arturo, and Adolfo Navajas 
Artaza at Establecimiento Las Marias near Governador Virasoro 
in Corrientes Province of Argentina. I am grateful for the hos- 
pitality of the Navajas Artaza, which made possible collecting 
in this unusually rich and little known area. 
References 
Gauld, I. D. 
1976. Classification of the Anomaloninae. Bull. British Mus. Natl. Hist. 
(Ent.) 33: 1-135. 
Townes, H. K. 
1971. The Genera of Ichneumonidae, Part 4. Cremastinae to Diplazontinae. 
Mem. Amer. Ent. Inst. 17 : 1-372. 
