PIAZURUS. 19 
segment has a shallow arcuate groove between the coxex ; the fifth segment is sinuato- 
truncate at the apex in the male. 
16. Piazurus quadratus, sp. n. (Tab. II. fige. 6, 64,8, 3.) 
Broad, depressed, shining, black, the antenna and the tips of the tarsi obscure ferruginous; sparsely clothed 
with narrow brownish and cinereous scales, the elytral tubercles each bearing a short, decumbent, pallid 
seta. Head rugosely punctate, the vertex granulate in front, depressed in the middle, the eyes contiguous ; 
rostrum slightly widened towards the tip, lineato-punctate at the base, and very sparsely, finely punctate 
thence to the apex; joints 2 and 3 of the funiculus equal in length. Prothorax short, about one-half 
broader than long, abruptly narrowed and compressed at the sides anteriorly, the sides parallel from the 
middle to the base, the base itself deeply bisinuate; rather coarsely, irregularly punctate. Elytra about 
one-half wider than the prothorax, subparallel in their basal third, conjointly rounded at the apex, the 
disc strongly, transversely depressed below the base; coarsely punctate-striate, the punctures becoming 
smaller and oblong in shape on the apical declivity, the interstices (except on the apical portion of the 
disc) set with numerous small, smooth, conical, setigerous tubercles, 3 with a stout, oblong prominence at 
the middle and a small prominence below the base, and 5,7, and 9 more or less raised. Ventral segments 
very sparsely punctate, 1 plicate on each side in a line with the inner edge of the posterior coxa, 2 along 
the middle nearly as long as 3-5 united, 5 with a rounded depression in the centre, which is limited in 
front by an arcuate ridge, the first suture strongly arcuate. Pygidium narrowly exposed. Legs rather 
short ; anterior femora unarmed, intermediate femora with a small tooth, posterior femora very broadly 
clavate and armed with a large triangular tooth ; posterior tibie broad, curved, mucronate at the inner 
apical angle. 
Length 8, breadth 41 millim. (¢.) 
Hab, Panama, Bugaba (Champion). 
One specimen. A peculiar form, easily recognizable by the very short, abruptly 
narrowed prothorax, the broad, subquadrate, transversely excavate, granulate elytra, 
and the greatly developed posterior femora. P. quadratus has the first ventral 
segment arcuato-sulcate, as in P. centrali-americanus, but the species seems to belong 
to Heller's subgenus Pseudopinarus. It has the mesosternum less transverse than in 
the genus Pinarus. 
17. Piazurus centrali-americanus. (Tab. II. figg. 7; 7a, hind leg.) 
Piazurus (Pseudopiazurus) centrali-americanus, Heller, Stett. ent. Zeit. 1906, pp. 32, 34, 40°. 
Hab. Mexico, Toxpam in Vera Cruz (Sal/é); Guaremata, Las Mercedes, Cerro Zunil, 
Mirandilla (Champion); Nicaragua, Chontales (Janson); Costa Rica, San Carlos 
(Mus. Dresden); Panama, Bugaba ( Champion), Chiriqui ( Zrétsch).—Kcuanor (Buckley, 
in coll. Fry). 
Thirteen specimens, agreeing with the Costa Rican type communicated by Dr. Heller. 
A large, robust form, with contiguous eyes, a narrow, conical prothorax, impressed with 
intermixed coarse and minute punctures, and broad, coarsely seriate-punctate elytra, the 
interstices of which are narrow, convex, and seriato-granulate. The anterior and 
intermediate femora are unarmed, the posterior pair with a large triangular tooth. 
The pygidium is rather broadly exposed. The first ventral segment is longitudinally 
DD 2 
