378 THE CANADIAN ENTOMOLOGIST 



bristly hairs are scattered over the entire insect, body and ap- 

 pendages, including even the palpi, those on the legs and other ap- 

 pendages smaller and shorter, some on the antennae being some- 

 what longer and a few on the coxae as long as or even longer than 

 the average ones on the dorsum of the abdomen, but less stout. 



Head from above about as long as broad, without a prominent 

 nasus as common in wingless psocids. Antennae thick and con- 

 sisting of nine segments; basal segment large, the apical four- 

 fifths swollen, the entire segment almost three times as long as 

 the greatest width; second and third segments approximately a 

 third narrower than the first and subequal in length, their com- 

 bined length scarcely as much as that of the basal segment; fourth 

 to ninth segments about the same thickness and length as the 

 basal one, the fourth slightly shorter, and the ninth somewhat 

 more pointed apically than the others. Mandibles subquadrate 

 and heavily chitinized, with two major teeth and some smaller 

 notches and with a few fine hairs on the outer side; between the 

 mandibles and the antennae is the clypeus, which is small and 

 narrow, making the antennae but little separated from the base of 

 the mandibles; maxillae large and well developed, from a side view 

 forming no inconspicuous feature of the head in fresh material 

 or specimens preserved in spirits, the tip pointed and chitinized 

 and with several moderately long teeth and some short brush-like 

 bristles; maxillary palpi consisting of five segments; basal segment 

 short and generally inconspicuous, little longer than broad ; second 

 segment of about the same thickness as the basal one, thickening 

 somewhat in about the apical two-thirds and about four times as 

 long as the greatest width; third segment about as long as the 

 second but a little thicker; fourth segment but little longer than 

 the apical width, apically about as thick as the preceding segment 

 but basally much narrowed, the tip concave; fifth and last seg- 

 ment noticeably longer than any of the preceding ones, nearly as 

 long as third and fourth together, and somewhat thicker than any 

 of the preceding ones, the margins very slightly rounded and the 

 tip broadly rounded; labial palpi three-segmented, the basal two 

 short and generally obscure and the apical one large and thick, 

 being nearly as thick as the terminal segment of the maxillary 

 palpi, and but a little shorter, the whole segment about three 



