72 
Psyche 
[June-Sept. 
widely separating the pectinate lateral pieces. Last coxae 
with peculiar setose lobes much as in Polygonarea. It differs 
from Polygonarea in lacking external lappets on the first 
maxillae, and in lacking ventral pores on the sternites. Anal 
legs with terminal claw. 
Genotype. — B. isolatus, sp. n. 
Barrophilus isolatus, sp. n. 
Yellow throughout, the head scarcely darker. 
Cephalic plate longer than wide in the usual ratio and of 
the typical general shape, being widest at caudal level of 
frontal region from where strongly narrowing cephalad and 
moderately caudad to the oblique caudal corners; posterior 
margin straight. A true frontal suture not present. Last 
two articles of antennae equalling or a little surpassing the 
two preceding taken together. A median clypeal area far 
forward at anterior end, this bearing four setae ; setae else- 
where absent from clypeus. Labrum distinctly tripartite, 
the lateral pieces pectinate ; the median piece dentate, about 
half as long as each lateral piece. 
First maxillae without external lappets; outer branch 
much exceeding the inner branch. Coxa of second maxillae 
strongly produced at disto-mesal angle into a conspicuous 
conical process; coxae separated at middle, there being a 
narrow, membranous and glabrous isthmus ; coxopleural 
suture long, running ectad of each pore as in Suturodes ; 
claw of palpus wholly smooth. 
Basal plate widely overlapped by the cephalic. Claws of 
prehensors when closed nearly attaining the distal end of 
the second antennal article. Claw article at base and femu- 
roid armed within with an acute, conical black tooth, the 
intermediate articles not armed. Prosternum without chiti- 
nous lines ; anterior margin with median excision, unarmed. 
Spiracles small, circular. 
Anterior sternites with a median longitudinal sulcus ; no 
ventral pores detected. 
Last ventral plate very wide with the posterior corners 
strongly rounded. 
Coxopleurse of the last legs with three glands on each 
side opening along border of last sternite. Adjacent to 
