PENTARIA.—NAUCLES. 257 
more slender tibie (the hind pair longer than the two basal joints of the posterior tarsi 
united) distinguish it from all the species of the following genus, to some of which it 
bears a close resemblance. 
NAUCLES. 
Mandibles toothed within just before the apex; last joint of the maxillary palpi stout, oblong-ovate, very 
obliquely truncate at the apex, the apex acuminate ; second joint of the labial palpi very stout, ovate, the 
apical joint quite slender and acuminate; lobes of the maxille narrow, rather long; mentum strongly trans- 
verse, narrowing a little in front ; antenne short, somewhat clavate, the penultimate joints transverse ; eyes 
coarsely granulated; fourth joint of the anterior and middle tarsi bilobed, as broad as, but shorter than, 
the third; all the tibia short and compressed, considerably dilated towards the apex, the posterior pair 
not longer than, or scarcely us long as, the first two joints of the posterior tarsi united ; upper surface 
very densely and minutely punctured, the punctures on the prothorax and on the extreme base of the 
elytra only forming faint transverse strige; ventral segments similar in both sexes, the sixth covered by 
the fifth; epipleuree much narrowed behind the posterior cox, and extending to about the apex of the 
third ventral segment; body oblong, subovate; the rest as in Pentaria. 
The above generic name is proposed to include several minute closely allied species 
from Central America. Most of the characters are very similar to those of Pentaria; 
but the short and conspicuously dilated tibie and the form of the labial palpi, the 
apical joint of which is very slender and acuminate, and the second joint very stout, 
forbid association with that genus. The four anterior tibie are broader at the apex 
and more compressed than in Anaspis, the hind pair similarly shaped. The short 
posterior tibie and the larger penultimate joint of the four anterior tarsi separate 
Naucles from Cyrtanaspis, Emery. The general shape is shorter and more ovate than 
in Pentaria. In the sculpture of the upper surface the genus differs from all the allied 
forms, there being no trace of transverse strigze on the greater part of the elytra, the 
thorax and the extreme base of the elytra only, at most, being very faintly transversely 
strigose. The ventral segments, as in Pentaria, are without external appendages in the 
male. ‘The characters of the mouth-parts are taken from J. tibialis. The species are 
very feebly differentiated, and in the absence of external male characters difficult to 
distinguish. 
1. Naucles tibialis. (Tab. XI. figg. 6; 6, labium; 66, maxillary palpus.) 
Oblong-ovate, entirely testaceous; the upper surface very densely and minutely punctured, the punctures on 
the prothorax and on the extreme base of the elytra only showing a tendency to form faint transverse 
strige, thickly clothed with very fine silky pubescence. Head moderately large, the eyes black; antennse 
short (not nearly reaching the base of the prothorax when the head is extended), joints 1 and 2 oblong, 
stout, subequal, 3-6 more slender, 3 shorter than 2, 4 much shorter than 3, 4-6 subequal, 7-11 much 
wider than 6, 7 about as broad as long, 8-10 strongly transverse, 11 ovate, longer than 10, testaceous, 
the basal joints a little lighter in colour; prothorax about one half broader than long, feebly bisinuate at 
the base, the sides moderately rounded, the hind angles subrectangular ; all the tibiee becoming broadly 
dilated towards the apex, the hind pair not longer than the two basal joints of the posterior tarsi united. 
‘Length 14-14 millim. (¢ 2.) 
Hab. GuATEMALA, near the city (Champion). 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 2, Judy 1891. 2 LL 
