1969] 
Porter — Bolivian T rachysphyrus 
365 
with abundant, well separated, small, sharp punctures emitting long 
setae which in great part exceed the length of their interspaces. 
Succeeding tergites with stronger micro-reticulation and even more 
numerous punctures and longer, more extensively overlapping setae. 
Collections: The holotype is in the Instituto Miguel Lillo at 
Tucuman, Argentina. Paratypes have been deposited in the Instituto 
Lillo; the Museum of Comparative Zoology at Cambridge, Massa- 
chusetts; the Canadian National Collection at Ottawa; the collection 
of Charles C. Porter at Cambridge, Maryland ; the California Acad- 
emy of Sciences at San Francisco; the collection of Henry K. Townes 
at Ann Arbor, Michigan; and the United States National Museum 
at Washington, D.C. 
Discussion : In its brilliantly metallic ground color, strong but 
dorsally unmodified epomia, large and nearly parallel-sided areolet, 
nearly straight 2nd recurrent, straight mediella, in having the axillus 
intermediate between the posterior margin of the hind-wing and the 
submediella, and in its elongate propodeal spiracle praeclarus is a 
typical representative of the Imperialis Group. 
Among those subdivisions of the Imperialis Group proposed in 
my recent study of the South American T rachysphyrus, the present 
species fits best in the Metallicus Subgroup, a series previously unre- 
ported for Bolivia but known from Andean habitats in Ecuador, 
Peru, and northern Chile. However, praeclarus differs from my 
earlier diagnosis of the Metallicus Subgroup (Porter 1967, p. 276) 
both because it has the notch on the ovipositor tip a little shallower 
with the accompanying fossa comparatively shorter and weaker, as 
well as because in the female its propodeum has more strongly pro- 
jecting and more wedge-shaped cristae and in form is a little shorter 
and higher than with most of the other species of the subgroup. 
Nonetheless, these are quite minor differences and there can be no 
doubt but that this new species belongs to the same radiation as 
metallicus and its previously described relatives. 
Within the Metallicus Subgroup, praeclarus seems especially close 
to the Peruvian species florezi and aglaus. From florezi it may be 
distinguished additionally by the following characters : flagellum 
often banded with white; mesoscutum more uniformly punctate, with 
punctures of lateral lobes less contrastingly smaller and sparser than 
those of central lobe; mesopleuron except on speculum uniformly 
reticulately wrinkled, without a smoother area above along prepectal 
carina; and propodeal cristae in both sexes more wedge-shaped and 
more strongly projecting. Moreover, aglaus , which is known only in 
the male, differs from praeclarus in its more uniformly golden thorax 
