GYROPHANA. 263 
17. Gyrophena jansoni. 
Sat convexa, nitidula, glabra, nigra, elytris abdomineque picescentibus, antennis pallide fuscis, basi pedibusque 
testaceis, illis articulo tertio brevi, 5°-10™ transversis ; prothorace convexo, disco quadripunctato ; elytris 
maris parce granulatis. 
Long. 2 millim. 
Hab. Nicaracua, Chontales (Janson). 
This insect is extremely similar to G. convewicollis; but the antennz have joints fifth 
to tenth shorter, broader, and darker in colour, and the male abdominal characters are 
different: in this sex there are apparently no tubercles on the sixth segment; and the 
central lobe on the following segment, instead of being triangular, is quadrate (that 
is, it has parallel sides and a truncate extremity); and between it and the lateral 
teeth there are on each side two excessively minute serrations. 
Only a single badly preserved individual has been found. ‘Three individuals of the 
other sex, from Zapote, though extremely similar to G. jansoni, are probably a distinct 
species: they have no granulations on the elytra. 
18. Gyrophena crassiventris. 
Convexa, nitidula, nigricans, elytris fulvis, antennarum basi pedibusque testaceis, abdomine rufescente, 
apicem versus attenuato, subtus perconvexo; prothorace quadripunctato; elytris in utroque sexu 
granulatis. 
Long. 2 millim. 
Hab. Panama, Bugaba (Champion). 
Antenne with the four basal joints yellow, the others dark; the third joint very 
short, only about half as long as the second; fourth very short; the fifth joint not, the 
tenth slightly, transverse ; terminal joint short. Prothorax transverse, but not quite 
so strongly as in some species, transversely convex; on the middle there are four 
quadrately-placed impressions. lytra longer than the thorax, covered with numerous 
granules, which are coarser in the male than in the other sex. Hind body red above, 
with a darker fascia or spot behind the middle, more than usually convex beneath, and 
conspicuously narrowed behind. 
In the male there are six excessively minute linear granules on the sixth dorsal 
plate in front of the hind margin; the dorsal plate of the following segment forms a 
large triangle in the middle, and has on each side a long spine extending a good deal 
further back than the middle triangle. In the female the corresponding plate has two 
small teeth in the middle and a rather longer spine on each side. 
Of this distinct little species Mr. Champion has found three specimens. Janson 
also found at Chontales a single male which may be a small variety of this species, but 
may possibly prove distinct; the chief differences are that it is rather smaller, has the 
granules on the elytra less developed, and the triangle and teeth of the apical segment 
smaller. 
