LEPTOBYRSA. 27 
4. Leptobyrsa chiriquensis, n. sp. (Tab. II. figg. 16; 16a, part of the body 
beneath.) 
Moderately broad ; testaceous or ferruginous, the body beneath partly black, the margins of the pronotum 
and the elytra in great part hyaline or pale testaceo-hyaline; the elytra with a transverse fascia on the 
costal area before the middle, a spot on the outer part of the discoidal area, and most of the nervures in 
the apical half and one or two of those near the base, fuscous; the antenne testaccous, usually with the 
apical joint black, sometimes entirely testaceous; the legs testaceous, the tarsi fuscous at the tip; the 
margins of the pronotum and elytra set with very short sete, the antenne with bristly hairs, the legs 
sparsely pilose. Head with three frontal spines—the upper median one short, and the two others longer 
and converging ; antenne moderately slender, joint 1 twice as long as 2 and shorter than 4, 2 short, 
3 twice as long as 4. Pronotum with the membranous margins broadly and arcuately produced in front, 
constricted at the middle and narrow thence to the base, rounded behind ; hood obsolete, the three carinz 
feeble, the outer ones abbreviated behind, the interspaces dull and closely punctured. Elytra broadly 
rounded at the base as well as at the apex, the entire costa slightly rounded ; discoidal area flat, sharply 
defined, somewhat piriform, rather broad, closely reticulated ; subcostal area wide, rounded externally, 
quadriseriate ; costal and sutural areas widely and unequally reticulated, the reticulation closer in the 
basal half, the costal area with three to four rows of areole at the middle. 
Length 34, breadth 23 millim. 
Hab. Panama, Bugaba, Volcan de Chiriqui (Champion). 
Fifteen specimens. Larger than Z. translucida, the reticulation of the elytra much 
wider and more unequal, the discoidal area broader and flat, the antenne stouter, the 
margins of the pronotum dilated in front. 
5. Leptobyrsa nigriceps, n. sp. (Tab. II. fig. 17.) 
Moderately broad ; testaceous, the head, the transverse pronotal calli, and the body beneath in great part, 
black, the margins of the pronotum and the elytra hyaline or testaceo-hyaline ; the elytra with a trans- 
verse fascia below the base, the nervures in the apical half, and also some of those near the base, fuscous ; 
the antenne: testaceous or ferruginous, with the apical joint (except at the base) black; the legs testaceous, 
with the tarsi black at the tip; the margins of the pronotum and elytra set with very short sete, the 
antenne with bristly hairs, the legs sparsely pilose. Head with three short frontal spines; antenne 
moderately slender, joint 1 twice as long as 2 and a little shorter than 4. Pronotum with the membranous 
margins broadly and arcuately produced in front, strongly constricted at the middle and narrow thence 
to the base, rounded behind; hood obsolete, the median carina feebly raised, the outer carine obsolete ; 
the disc and the posterior portion shining and closely punctured, the latter abbreviated and rounded behind. 
Elytra broadly rounded at the base as well as at the apex, the entire costa feebly rounded ; discoidal 
area comparatively short, elongate-triangular, closely reticulated ; subcostal area rather narrow, triseriate ; 
costal and sutural areas widely and unequally reticulated, the costal area with about four rows of areole, 
diminishing to three at the base. 
Length 34-33, breadth 23-22 millim. 
Hab. Guatemata, Cerro Zunil (Champion); Panama, Volcan de Chiriqui (Champion). 
Two specimens from each locality. Very like L. chiriquensis, differing from it in 
the unicarinate pronotum, the black head, and the narrower discoidal and subcostal 
areas of the elytra. 
