20 
Psyche 
[March 
basal two segments. There is considerable variation in the width of 
the front (middle interocular distance *43-.53 X width of head) 
and in the size of the ocelli (postocellar line 1.6-2. 3 X ocello-ocular 
line, the latter .25-. 55 X the diameter of a lateral ocellus). I ex- 
amined the genitalia of four males from as many localities and found 
no variation worthy of note. 
Ghirodamus imitator new species 
Plolotype. — - cf , Ecuador: Libertad, 2 km. SE Ongota [near 
Tena], 12 May 1963 (L. Pena) [Mus. Comp. Zool., No. 3 1 598] . 
Description of male type. — Length 22 mm; fore wing 17.5 mm. 
Body and legs rather uniformly light castaneous except as follows: 
tips of mandibles black ; scape yellowish beneath, flagellum fuscous on 
upper surface (antennae missing beyond segment five) ; clypeus, face, 
broad inner orbits, and rather narrow outer orbits yellow; pronotum 
slightly suffused with yellow on sides and along posterior margin; 
mesoscutum and scutellum uniformly dark castaneous; metanotum 
suffused with yellow; abdominal tergites with rather weak, fuscous 
apical bands ; hind tibial spurs and hind tarsi somewhat infuscated ; 
pterostigma light castaneous, wing membranes wholly, lightly suf- 
fused with yellowish-brown. Temples and propleura with numerous 
pale setae; front coxae, vertex, and sides of propodeum with some 
pale, thin setae; abdominal venter with numerous short, suberect, pale 
setae. Labrum exserted to about half the length of the clypeus, its 
apical margin slightly notched. Clypeus 1.6 X as wide as high, its 
apical margin truncate. Head 1.1 X as wide as high; front very 
narrow, middle interocular distance only .43 X width of head ; upper 
interocular distance .82 X lower interocular distance; eyes and 
ocelli unusually large and convex; diameter of front ocellus one third 
the middle interocular distance; laterals removed from eye margins 
by only one fourth their own greatest diameter; postocellar line 1.5 
X ocello-ocular line; area within ocellar triangle considerably ele- 
vated. First four antennal segments in a ratio of about 19:5:30:27, 
third segment 4.5 X as long as its apical width, 1.25 X as long as 
upper interocular distance. Pronotum rather small, not at all swol- 
len on the sides, its posterior margin strongly angulate; postnotum 
approximately as long as metanotum although considerably shortened 
at the midline; propodeum sloping very smoothly and gradually, the 
median line not impressed. Hind wing with the anal vein sloping 
up gradually to meet media slightly beyond origin of cubital vein; 
transverse median vein of fore wing strongly oblique, meeting media 
