194 
Psyche 
[December 
Differing from the female of atratulus in the following 
characteristics : 
The single mucronate point with which the mandible is 
armed longer and stouter ; the convex masticatory border of 
the mandible very feebly serrate (smooth in atratulus). 
Eyes nearly circular in outline and strongly convex with 
rather fine facets (oval and moderately convex with coarse 
facets in atratulus). Lateral ocelli small and so placed that 
they are hidden when the head is viewed from directly in 
front by the rectangular occipital crest on which they are 
borne (lateral ocelli larger and distinctly visible from the 
front in atratulus). Antennal scapes slightly and evenly 
curved outward, gradually increasing in thickness from base 
to apex and in repose surpassing the occipital border by an 
amount equal to the greatest thickness (in atratulus the 
scapes are almost straight, thickest at a point about three- 
quarters of the distance to the apex and in repose surpassing 
the occipital border by an amount less than their greatest 
thickness). Seen from above the epaulet-like lateral por- 
tions of the pronotum are strongly concave, blunted behind 
and set off from the median portion of the pronotum by a 
rounded welt or ridge (in atratulus the lateral portions of 
the pronotum are only slightly concave, rather sharp behind 
and set off from the median portion of the pronotum by a 
sharp ridge) . Scutum longer than in atratulus and with 
more overhang at the anterior edge. The posterior portion 
of the scutum is evenly depressed all the way across includ- 
ing the paraptera so that there is a sharp transition to the 
scutellum when the thorax is viewed in profile (in atratulus 
the depression of the scutum is median only, the paraptera 
not being depressed, so that there is a sort of a shallow 
trough formed on the dorsum of the thorax ; however in pro- 
file the transition between the scutum and scutellum appears 
less abrupt because of the elevation of the paraptera above 
the level of the middle of the scutum) . Scutellum narrower 
and much more convex than in atratulus. Epinotum seen 
from above with the lateral projections less prominent and 
