30 Psyche [March-June 
tion about three fifths of the subzonal one, vesical opening at 
about two thirds from zone on the ventral side. Furca longer 
than the subzonal portion of the aedeagus and very thin. Sagum 
very remarkable: showing a transitional stage of development 
between Hemiargus ceraunns and Echinargus isola ; each of its 
twin parts produced ventrad from the zone and embraced by 
the furca, in shape roughly resembling a high-shouldered falx 
the forearm of which (copied by the jutting lower portion of 
each lobe) would terminate in a process resembling a valval 
comb. For purposes of measurement this peculiar fig-leaf type 
of sagum may be imagined in the case of each lobe as a roughly 
equilateral* triangle ZPD. 1 (where Z is the praezonal point, P the 
base of the penis and D the dentate end of each sagum lobe) 
with ZP (along the aedeagus) and PD (at an angle away from 
the aedeagus ventrad) and the imaginary line ZD connecting 
these points (and in position coinciding with the “filled out” 
ventral margin of each lobe in isola) each about 0.3-0.35 long. 
Actually a large portion (shaped rather like the falcal arch in 
high-shouldered falces) is left unfilled in the triangle ZPD so 
that each sagum lobe consists of an upper portion dorsally 
curving along the aedeagus, ventrally sinuous with a bulge in its 
outline, and roughly 0.35 long by 0.15 broad at that bulge, and 
of a lower portion, jutting in a ventral direction, 0.35 long 
along its straight basal side, 0.3 along its sinuous and oblique 
opposite margin and 0.04 broad at the beginning of its free part, 
then widening to 0.1, and at the very end narrowing again to 
form a spur 0.05 broad with four teeth 0.01 long. Falx and 
uncus lobe covered by the generic description and the measure- 
ments given below. Valve small but at least a fifth longer than 
the aedeagus, elongated, slightly more than twice as long as 
broad, with Bayard’s angulation well pronounced. Rostellum 
bent towards the mentum, thin, tapering, about 0.11 long. 
Female: henia extruding (semi-exerted) to a length of 0.25 
by 0.12 broad medially in lateral view. Fibula consisting of 
two lamellate portions one longer by 0.04 than the other which 
is 0.17 long by 0.12 broad, of a suboval shape. Papillae anales 
about 0.33 long by 0.42 broad, with rods 0.7 long. 
Measurements (in mm.) : aedeagus 0.56-0.58, suprazonal por- 
tion 0.2-0.21, subzonal 0.36-0.37 with breadth 0.1; penis 0.5. 
Furca 0.42-0.43. Sagum 0.35 (see description). Vertical/Hori- 
1 Which following the falcal simile would coincide with BHF (see pi. 1). 
