1975] 
Orth j Moore , Fisher and Legner — Ocypus 
295 
Once the larvae were housed within the cells they remained inac- 
tive without visual physical change for a period of about io days. 
Pupation then took place. Visual observations were facilitated by the 
clear plastic containers. 
The newly transformed pupae were testaceous and about 18 mm 
in length. They changed rapidly from testaceous to piceous 9 to 
14 days after pupation. The pupa illustrated was removed from 
the substrate and held in a covered petri dish which contained 
dampened filter paper to preserve moisture. This greatly facilitated 
the drawings and observations. Eighteen days after pupation it ap- 
peared ready for emergence. However, for reasons not understood, 
the specimen in the petri dish and those that remained in the plastic 
containers failed to emerge. An additional mature larva (29 mm) 
was brought into the laboratory 30 May 1975. Shortly thereafter, 
without any laboratory feeding, it burrowed to the bottom of the 
unit. It then pupated but it too failed in its final development. 
MATURE LARVA OF OCYPUS OLENS (Muller) 
Length 21.0 mm. Body elongate, somewhat convex, subparallel, 
tapered to apex of abdomen ; piceous with the appendages paler ; 
foreparts shining, abdomen finely densely reticulate and dull. Head 
oval, very slightly wider than long; with four ocelli grouped in a 
compact square at each side behind the base of the mandible. Cly- 
peus with nine short blunt teeth, the center one smallest (another 
specimen lacked the center tooth), the next two very broad, occupy- 
ing about two-fifths of the width of the clypeus. Antennal fossa 
located at front of the head slightly basal to and between the base of 
the mandible and the clypeus. Antenna four-segmented, first segment 
short, almost as wide as long; second segment a little narrower than 
first, about four times as long as wide; third segment narrower and 
shorter than second, four times as long as wide, with a minute 
“acorn seta” at apex; fourth segment a little more than half as long 
and about half as wide as third, about four times as long as wide. 
Mandibles arcuate, acute at tip, without internal teeth. Maxillary 
palpus five segmented ; first segment short, stout, not forming a 
complete ring, possibly representing the galea; second segment more 
than three times as long as wide; third segment a little shorter and a 
little narrower than second ; fourth segment shorter and hardly more 
than half as wide as third; fifth segment one-third as long and one- 
half as wide as fourth, tapered to pointed apex. Mala cylindrical, 
narrower than second segment of maxillary palpus and about half as 
