SAZICHES.—OXIDATES. 263 
impressions, the impressions on the disc placed upon narrow impressed lines (these lines or strie are well 
defined and deeply impressed outwardly, though shallow towards the suture, and extend only for about 
one third of the length of the elytra and are quite obsolete from the basal and apical portions); beneath 
shining, very shallowly, finely, and sparingly punctured. 
Length 113-15 millim. (¢ 9.) 
Hab. Guatemaua (coll. Brit. and Stuttgart Museums), Senahu and San Juan in Vera 
Paz 2000 to 3000 feet (Champion). 
Several examples. 
OXIDATES. 
Spherotus (8rd division), de Bréme, Revue Zool. 1842, p. 109; Lacordaire, Gen. Col. v. p. 447, 
nota (nec Kirby). 
Very near Spherotus and differing as follows :—Mentum strongly deflexed at the 
sides, about as broad as long ; inner lobe of the maxille armed with a long curved claw 
at the apex * (in Spherotus with coarse sete only); epistoma larger and separated from 
the front by a fine impressed line (in Sphwrotus by a deep groove); antenne slender, 
the penultimate joints narrower at the base; prothorax never longer than broad, much 
less convex, usually moderately transversely so (never globose or longitudinally convex), 
more evidently margined, in most of the species very strongly so at the base; scutellum 
small; elytra with rows of more or less coarse rounded impressions ; prosternum much 
broader (except in O. puncticeps), more or less strongly and horizontally produced, often 
deeply longitudinally grooved on each side (declivous behind and less strongly produced 
in Spherotus); mesosternum usually very feebly excavate in front, rarely V-shaped 
(O. planicollis); epipleuree extending to the last ventral suture, thence in some species 
very narrowly continued to the apex; tarsi not so stout, the first joint of the posterior 
pair short as in Spherotus; tibie slightly curved and sinuous in both sexes, more 
distinctly so in the male; the rest as in Spherotus. 
This genus contains various Mexican species which I have thought advisable to 
separate from Spherotus; it includes the three species placed by the Marquis de Bréme 
in his third division of that genus, and some others described here. Lacordaire (op. cit.) 
reproduces de Bréme’s divisions and remarks that some of the species placed by that author 
in Spherotus probably belong to other genera. Oaidates will be known from Spherotus 
by the above-mentioned characters, but more especially by the strong claw to the 
maxille and the differently formed prosternum. Sphwrotus as understood here will 
contain only the first division of the genus as defined by de Bréme, and of which the 
South-American S. curvipes, Kirby, and S. cribratus, de Bréme, may be taken as the 
types. The second division of Spherotus, originally containing only one species, 
S. politus, de Bréme, from Mexico, is, as already noted, here separated and included 
under the genus Mitys. 
* De Bréme (op. cit. p. 107), in amending Kirby’s definition of Spherotus (Trans. Linn. Soc. xii. p. 416), 
states that the inner lobe is armed with a very small claw. I fail tosee this in the typical species (S. curvipes 
and S. cribratus); this character is not mentioned by Lacordaire. 
