READING PUBLIC MUSEUM AND ART GALLERY

66 THE TRIBE ONCIDERINI
yellow, the apicul third fuscous or piceous. Antenme fuscotls, basal quarter of
third segment beneath, entire basal third of fourth, and basal fourth of following
segments, rosy-yellow; scape and third segment covered with fu!vous-gray pub­
escence, mottled with dark brown, basal one-third of third segment, and pale bases
of the following, gray pubescent., apical portion of fourth and following clothed
with dark brown.
Head above densely, minutely pUJlctate, with a median impressed line from
occiput nearly to epistrna; front minutely, densely punctate, with a number of
coarse punctures interspersed, along lateral margin OIl lower half with a broad
linear impression, and on each side of middle above clypeus a broad, shallow
fove..'\; genae vertic.'l.l, pube:cent, irregularly and coarsely rugose ; eye with lower
lobe oblong, narrowed gradually below, subequai in height to gena; antennal
tubercles somewhat remot-e, feebly prominent, terminating at .'l.pex in a broad, ob
tuse, short tooth. Pronotum strongly transverse, sides stmight, tapering to apex,
without trace of tubercle; with a feeble apical and more distinct bas.'I1 trUIlsverse
sulcus, the latter eO.'l.le:cent with the deeper, lateral, oblique one; disk with five
elongate, subcqual, prominent tubercles, the median one and the two most lateral
nearly in a straight line, the two submedian ones more apical, acros.[ALE. Form slightly more robust; head with front having lateral and supra
clypcnl impressions less distinct; antennal tubercles only minutely produced at
apex; profemora not rugose; metatibiae unmodified; fifth sternite twice length of
fourth, apex retuse, with a broad median impres:ed line.
LENGTH 12.6-18 mm.; width 5.5-8.3 mm.
n olotype.-Male ; Rio Huallaga, Acl1inamiza, Peru, September
10, 1927; [Reading Museum number 5000.J.
A llotype.-Female j Achinamiza, Peru, September 7, 1927;
[.Reading Museum].