294 
Psyche 
[Vol. 95 
group: smooth mesopleuron, smooth scutellar disc, and carinate- 
rugulose propodeum. Furthermore, Betelgeuse does have a suite of 
synapomorphies which place it in the Section 2 tribe Dinocampini 
(sensu Shaw 1985): deep propodeal impression, coarse frontal sculp- 
ture, minute ocular setae, elongate scape, and 2-segmented labial 
palpus. In view of this, I regard Betelgeuse as a member of the 
Dinocampini, which has lost the first segment of the cubitus (a 
convergence with Section 3 genera). Within the Dinocampini, 
Betelgeuse has two synapomorphies of the lineage comprising 
Dinocampus + Ropalophorus: wide face, and areolate propodeum. 
At least two putative synapomorphies suggest a sister-group rela- 
tionship with Ropalophorus: flagellum reduced to 13 segments or 
less (8 in Ropalophorus ), and propodeum produced dorso-laterally 
as distinct tubercles. The latter is particularly convincing as a syn- 
apomorphy since it does not occur elsewhere in the Euphorinae, and 
was previously known only in Ropalophorus. The monophyly of 
Ropalophorus remains indicated by its 8-segmented clavate flagel- 
lum (Shaw, 1985). These relationships are expressed as a cladogram 
(Fig. 4) modified from Shaw (1985, 1987). 
Betelgeuse aztecus, new species 
(Figs. 1-3) 
Holotype. Female, Mexico: Durango, 9000', El Salto, 10 mi. W., 8 
June 1964, (W.R.M. Mason). [Canadian National Collection, 
Ottawa] 
Diagnosis of holotype female: Body length 3.83 mm; forewing 
length 2.92 mm; flagellomere length ratios (FI -FI 3) 19:14:12:11:9: 
6:5:5:5:5:5:5:8; malar space 0.16 eye height; ovipositor length 2.2 
mm. 
Body predominantly reddish brown except apex of antenna 
(F10-F13) and metasomal terga 2-7 infused with black; F6-F8 yel- 
lowish brown; wing venation dark brown; wing membrane hyaline 
except amorphous infused patch along basal vein and another 
below stigma; ovipositor sheaths dark brown; ovipositor yellowish 
brown. 
Paratype female: Essentially as in holotype except F9 apically 
infused with black; F6-F8 more yellow. 
