112 HETEROMERA. 
One species from Mexico and British Honduras. On account of the different shape 
of the head, the broader intraocular space (the eyes in consequence more distant), and the 
more narrowly margined thorax, Hicetaon is best separated from Gatus, which in other 
respects it greatly resembles. The shape of the front of the head more nearly approaches 
Iphthimus, a genus found in Europe and temperate North America; the shorter head, 
larger eyes, narrower intraocular region, differently shaped mentum, and the more parallel 
form will, however, at once separate it from that genus. 
1. Hicetaon frontalis. (Tab. VI. fig. 8.) 
Black, shining. Head very coarsely and rugulosely punctured between the eyes, the epistoma and vertex 
smoother, the vertex longitudinally impressed ; prothorax convex, the sides rounded, sinuate before the 
base, narrowed behind, the posterior angles subacute, the disc raised in the middle in front, finely, shal-. 
lowly, and sparingly punctured ; elytra crenate-striate, the interstices smooth and convex ; ventral seg- 
ments at the sides, and the last at the apex, margined within. 
Length 174-21 millim. (¢ 9.) 
Hab. Mexico, Jalapa (Hége); Britis Honpuras, Rio Hondo and Rio Sarstoon 
(Blancaneaux). 
Four examples. 
STHENOBCAA., 
Near Gatus. Mentum narrow, about as broad as long, strongly inflexed on each side, longitudinally convex in 
the middle, anterior angles rounded; mandibles truncate at the apex ; apical joint of maxillary palpi secu- 
riform ; inner lobe of the maxille: unarmed ; antenne moderate, about reaching to the base of the thorax, 
third joint as long as the first and second united, fourth to seventh decreasing in length and widening 
outwardly, fourth and fifth oboval, sixth and seventh triangular, eighth to tenth broad and transverse, 
eleventh large and broad, much longer than the tenth, and bluntly rounded at the apex ; head not very 
deeply sunk into the prothorax, moderately large; epistoma rather broad, truncated in front; sides of the 
front rounded, slightly swollen and divergent ; eyes narrow, transverse, not very large, moderately promi- 
nent, intraocular space moderately broad; labrum not prominent; prothorax very strongly transverse, 
almost twice as broad as long, lateral margins narrow and distinctly reflexed, base strongly bisinuate and 
margined within, hind angles rectangular, anterior angles rounded or obtuse, closely embracing the elytra ; 
scutellum large, scutiform, finely punctured; elytra a little wider than the thorax at the base (in our 
species), about four times as long as the thorax, moderately convex, punctate-striate (in our species) or with 
rows of coarse impressions, the scutellar stria deeply impressed, feebly rounded at the sides, widest beyond 
the middle, transversely and shallowly impressed on each side just before the base, humeri distinct (in 
our species); epipleurs narrow, widening at the base, and ending at last ventral suture; prosternum 
horizontal, smooth, the apex strongly produced, convex, lanciform; mesosternum strongly raised and 
tuberculiform on each side anteriorly, deeply concave within; legs moderate; femora thin ; tibie curved, 
the apices pubescent within and feebly grooved on their external edge, spurs‘almost obsolete, the inter- 
mediate and posterior pairs in the male with a sharp tooth on the inner side near the apex; tarsi moderately 
long and stout, basal joint as long as the two following joints united, the basal joints densely clothed with 
spongy fulvous hair beneath. Winged. Species black, or with angulated transverse red bands. 
This genus will include one species from Mexico, the undescribed [phthimus brevicollis, 
Laf., from Colombia, and 1. wndulatus, Chevr., from Guiana. Sthenobwa is not very 
closely allied to any of the new genera described here; it is perhaps nearest to the 
undescribed Upis (?) exarata, Dej., from Brazil. From Gatus, and other Central- 
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