Il. Corrodentia: Psocidae. On a new Southern Nigerian 
Psocid. By Prof. R. Newsteap, F.R.S. 
Puate XI. Text Ficure 1. 
Psocus nigeriensis, sp. n. 
General colour of body dusky ochraceous, legs slightly paler 
than thorax with the distal extremities of the tibiae dark brown 
or black; spines on the legs dark brown or black; nasus some- 
times with very faint traces of dark brown, interrupted, vertical 
markings. Antennae with the first three segments slightly paler 
than the thorax, the rest dark brown or blackish. Wings with 
the venation normal, perostigma very faintly infuscated; there is 
also a small faintly infuscated area immediately below the superior 
¥ “See eesca -- 
Fia. 1. Psocus nigeriensis, Newstead. 
apical furcation; the transverse vein and the proximal branches of 
the forked vein (forming roughly the cursive numeral 4, upside 
down on the left and also retrograde on the right), also the veins 
enclosing the marginal cellules 2-4, and the major portion of the 
superior apical furcation, intense dark brown to blackish; the 
remaining portions of the veins faintly indicated and almost colour- 
less. Eyes either partially or entirely black. 
©. Number of antennal segments doubtful (ten were counted 
in one individual, but this appeared to be imperfect); Ist and 2nd 
segments very short and the former moniliform and much stouter 
than the 2nd; 8rd and 4th equal in length, and about ten times 
longer than the 2nd. Maxillary palpi (Pl. XI, a) with the 2nd seg- 
TRANS. ENT. SOC. LOND. 1921.—PARTS III, IV. (JAN. 22) 
a ae Oe Ce ee 
