HYDNOCERA.—ISOLEMIDIA. | 177 
is more of a greenish blue than in the preceding. The carina is much more acutely 
marked, and often continues to within one third of the apex. The shining pubescence 
is almost confined toa spot; and the legs are more frequently pale. I was once inclined 
to think the Panama and Nicaragua specimens were a different species, on account of 
the carina being more produced; but I am now disposed to unite them as local forms 
only. 
24. Hydnocera quadrilineata, 
Hydnocera quadrilineata, Chevr. Rev. et Mag. Zool. 1874, p. 71°. 
Hab. GuateMata, Yucatan, Teapa ! (Pilate). 
Unknown to me; apparently allied to H. marginata. 
ISOLEMIDIA. 
Isolemidia, Gorh. Trans. Ent. Soc. 1877, p. 257. 
The species for which this genus was proposed resemble rather closely the Lemidie 
of the Australian region, but are in reality more nearly allied to Hydnocera. From 
Dereutes, Chevr., to which the insect now described is also apparently allied, the want 
of any sinus to the eyes will serve to distinguish it ; they are, in fact, entire; the antenne 
are eleven-jointed, with a small, rather connate, three-jointed club. The four species 
originally included in the genus were all from the South-American continent, three 
being from the Amazons, and one from Rio Janeiro, though not quite satisfactorily placed 
there. And the present species may require a fresh genus for its reception when 
comparison has been made with my typical species, which I am unable to make at the 
present time. 
1. Isolemidia subviridis, 
Nigra, nitida; antennis, palpis, pedibus elytrisque olivaceo-viridibus, his basi, sutura apiceque indeter- 
minate nigro-piceis, levibus ; oculis subglobosis, integris ; antennis brevibus, quam caput paullo longioribus. 
Long. 6 millim. 
Hab. Panama, Volcan de Chiriqui (Champion). 
Head with the eyes wider than the thorax, the front between them as wide as the 
front of the thorax, finely strigose near each eye and punctured in the middle. The 
antenne have the joints succeeding the basal one not much longer than wide, the three 
last transverse, forming a short oblong club. The thorax is constricted in front and 
behind, the sides widened and rounded, much as in Hydnocera; the frontal part 
transversely strigose, the disk smooth, with a few shallow impressions on the sides and 
near the base. Elytra smooth, with very obsolete indications of strie; the shoulders 
distinct, with a very small callus, which is brown ; the scutellar region is greenish ; in one 
specimen the base is black, in the other it is olivaceous to beyond the middle, the 
BIOL. CENTR.-AMER., Coleopt., Vol. III. Pt. 2, January 1883. 2A 
