94 
ProceedliLf/s of the Biological Socteii/ of Washington. 
IMandibles .shining, wifh ratiier coarse parallel striae. Frontal area dis¬ 
tinctly shining. Clypens, sides and upper surface of head traversed hy 
rather coarse rngae, coar.se.st on cheeks. Clyjieal rugae parallel, those of 
upper head plainly diverging j)Osteriorly but less .so than in P. occidentalis. 
Interrugal s))aces densely and distinctly foveolate-j)unctate. TJioracic 
sculpture iuterinediate between that of P. occidentalis and P. comanche, 
the longitudinal rugae of the niesonotiun being shorter than in the 
former, ])ut very evident. Infras])inal facet of ei)in()tum distinctly shining. 
Petiole and postpetiole foveolate-punctate, occasionally with faint longi¬ 
tudinal rugae, uot shining. Gaster minntely ])unctate, .shining; legs less 
shining with coxae faintly rngose, the rugae most evident on anterior, 
least distinct and more irregular ou posterior legs. 
Body and appendages beset with pale bristly hairs, which are long and 
project forward on anterior margin of clypens, most abundant on dorsal 
surface of gaster, .shortest and mo.st a])pre.s.sed on antennae. Abundant 
oblique hairs on legs. Lower surface of head and mandibles with the 
usual beard of long recurved hairs. Pubescence entirely lacking. 
Head, thorax and j)edicel deej) ferruginous red, darkest on postpetiole, 
gaster and legs pitchbrown to light yellowdsh red, mandibles piceous, 
mandibular teeth and anterior edge of clypeal excision black to blackish. 
Eyes black. 
Female .—Length 10 mm. 
Plead, excluding the 7-toothed mandibles, very slightly longer than 
broad, with straight posterior border. Mandibnlar teeth decidedly better 
developed than in worker. Cljq^eus and frontal area as in worker. Ocelli 
minute. Eyes about as in worker. Antennal scape reaching to less than 
midway between eye and posterior corner of bead. 'J'horax distinctly 
narrower than head. Plpinotal spines shorter and much stouter than in 
worker. Ventral tooth of petiole lacking. 
Sculpture of head and mandibles as in worker. Pronotum with trans¬ 
verse rugae, mesonotum with longitudinal rugae, much finer and more 
even than those of head; metanotal rugae similar but trausver.se; infraspinal 
facet of epinotum as iu worker, rather more shining. Gaster and legs, 
particularly the former, more shining than in worker. 
Pilosity generally longer and finer than in worker, otherwise the same. 
Color that of worker. Wings hyaline with yellow-brown veins. 
Male .—Length 8 mm. 
Plead not broader than thorax, posterior border convex, sides sub¬ 
parallel. Clypeus shallower than iu the preceding forms, more convex, 
the excision much broader aud shallower. P^routal area much depressed, 
triangular, broader than long, with feelfie median carinula. IMandibles 
5-toothed, small. Pilyes large, protruding beyond sides of head. Ocelli 
large. Antennae 13-jointed, scapes .short, barely reaching to posterior 
border of eyes. Epinotal spines reduced to mere ]>oiuts, four or five times 
as far apart as long. \^entral tooth of petiole entirely suppressed. 
■Mandibles shining, finely striate. Kugae of cly})eus and head fine and 
even, those of head parallel, not diverging ])osteriorly. Interrugal spaces 
