THIONE. 545 
obliterated prosternal sutures. For the present I associate it with Prostomis, to avoid 
multiplication of the primary divisions of the family. 
The insects of this genus have been alluded to by Mr. Lewis [Ann. & Mag. Nat. 
Hist. (6) iv. pp. 273, 274], who, in describing the Japanese genus Shoguna (which he 
subsequently thought to be the same as Pachycephala, Fairm., a name more than once 
preoccupied), remarked that certain S.-American insects in Pascoe’s collection appeared 
to be congeneric therewith. This, however, cannot, I think, be the case, as my friend 
has described, I have no doubt correctly *, the tarsi of Shoguna as being 5-jointed ; 
the S.-American insects are those for which I adopt the name Zhione, under which 
name they stand in Pascoe’s collection, now in our National Museum, though I am 
unable to discover that the genus has ever been described. 
1. Thione cephalotes, sp. n. 
Subyclindricus, castaneus, nitidus; antennis pedibusque flavis; capite thoraceque parce subtiliter striolato- 
punctatis, illo anterius obtuse furcato ; elytris leviter striatis, striis e punctis elongatis compositis. 
Long. 4 millim. 
Hab. Nicaragua, Chontales (Janson); Panama, Bugaba, Volcan de Chiriqui (Champion). 
Head in front produced into two short obtuse processes, between which there is 
only a slight depression. Thorax elongate, narrowed behind, very finely margined at 
the sides; bearing fine distant punctures of the nature of short scratches; hind angles 
obtuse. Elytra slender, finely striate, the striz at the apex becoming mere series of 
very fine punctures, and even on the basal portion being evidently formed in a similar 
manner. Legs pale yellow; tibiz a good deal enlarged and acuminate at the tip. 
2. Thione puncticeps, sp. n. | 
Subcylindricus, castaneus, nitidus; clypeo anterius impresso, vix furcato; capite crebre, fortius punctato ; 
prothorace angusto, subtiliter parce striolato-punctato ; elytris parum discrete striato-punctatis. 
Long. 3 millim. 
Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 
This insect is extremely similar to 7. cephalotes, but may be distinguished by the 
comparatively coarsely punctured head. The punctures on the anterior part of the 
head are coarse and of the ordinary form, but on the posterior part they are replaced 
by fine strie. The thorax is slender and is sparingly punctate, the punctures on the 
anterior part being elongate, while towards the base they are shorter. The head is less 
elongate than in either 7. cephalotes or T. championi, and there are really no angular 
prominences in front, the appearance that exists of such being due to a deep depression 
* Since my remarks were written I have, through the kindness of Mr. Lewis, had an opportunity. of 
examining a specimen of the genus Shogunua. It is extremely closely allied to Thione, but the prosternal 
process is not bent upwards at the tip and the pygidium and terminal ventral segment are very elongate. 
I am unable to distinguish more than four joints on any of the feet. 
BIOL. CENTR.-AMER., Coleopt., Vol. II. Pt. 1, August 1899. 4 A* 
