96 
Psyche 
[June- Sept. 
the side with its edge broadly and deeply grooved along the 
entire lateral and anterior borders, thus giving the clypeus 
the appearance of having 2 margins, a thin but narrow 
upper margin and a thicker broader lower margin which 
projects beyond the upper margin and is visible when the 
clypeus is viewed anteriorly. Mandibles rather slender and 
elongate, the exterior border straight basally, feebly convex 
apically ; basal tooth stout, partially concealed by the clypeus 
when the mandibles are closed ; succeeding toothless space 
very short; apical teeth comprising 7 or 8 large irregular 
teeth which decrease in size anteriorly to merge into the 
apical series of numerous small teeth. Antennal scapes 
broadly curved basally, not angulate, fourth funicular joint 
slightly longer than the first; terminal joint slightly longer 
than the remainder of the funiculus. Sides of head pos- 
terior to the antennal insertions suddenly expanding to a 
broadly circular border so that that portion of the head 
appears subglobose when viewed anteriorly. Posterior 
border narrowly and rather deeply excised. Thorax essen- 
tially as in S. clypeata; mesoepinotal suture distinct but not 
constricted; median longitudinal carina prominent, espe- 
cially on the basal surface of the epinotum. Petiole, post- 
petiole and gaster as in S. clypeata. 
Head, thorax and petiole densely reticulate-punctate, sub- 
opaque; vertex of head with 8 or 10 broken irregular longi- 
tudinal rugae. Mandibles, clypeus, sides of mesonotum, 
meso- and metapleura, dorsum of the postpetiole and gaster 
smooth and shining; basal % of the first gastric segment 
with numerous coarse longitudinal striae. 
Hairs on clypeus sparse, long, erect, more numerous on 
the edges, each hair being fairly straight at the base, curved 
and slightly enlarged on the apical 1/8, % to % the width of 
the clypeus ; hairs on vertex numerous, shorter, erect, 
clavate, curved anteriorly; antennal scapes with numerous 
hairs similar to those on the vertex but less clavate, curved 
toward the tips of the scapes; hairs on the thorax, petiole 
and postpetiole numerous, variable, those on the thoracic 
dorsum being rather long, slightly clavate, appressed, those 
on the petiole and postpetiole averaging longer, more erect 
and not clavate; gaster with sparse, long, slender, erect 
hairs. Spongiform processes as in S. clypeata and related 
species. 
