170 STAPHYLINIDA. 
mity, third joint slightly shorter than the second ; from the fourth to the tenth each is 
a little broader than its predecessor, and the first of them is slightly, the last rather 
strongly transverse ; terminal joint stout, obtusely pointed, longer than the two preceding 
together. Head narrow, much narrower than the thorax, nearly black, shining, 
sparingly and very obsoletely punctate. Thorax almost as long as broad, but little 
convex, only slightly curved at the sides, shining, reddish, sparingly punctate. lytra 
slightly longer than the thorax, rather closely and finely punctate. Hind body reddish ; 
fourth, fifth, and sixth segments picescent at the base, finely and not closely punctate ; 
second to fifth segments each with a regularly curvate impression at the extreme base. 
Two specimens only have been found of this species. 
Group MYRMEDONIINA. 
Anterior tarsi four-, intermediate and posterior five-jointed. 
TINOTUS. 
Caput haud liberum, absque collo. Prothorax marginibus valde inflexis, occultis. Coxe intermediz late 
distantes, mesosterni processu inter eas longius producto, in medio longitudinaliter carinato, apice lato, 
rotundato-truncato, sub metasterni processus brevissimi apice producto. Tarsi posteriores modice elongati, 
articulo basali quam secundus longiore. 
The insects of this genus have the facies of small species of Aleochara, of the 
subgenus Baryodma, Rey, and agree therewith in the structure of the pieces adjoining 
the middle acetabula; but their palpi have no definite supplementary terminal joint, . 
and the front feet I think have only four joints: this latter character necessitates the 
location of the genus in the Myrmedoniina, where, however, it will be quite isolated. 
The genz are marginate; the prosternum is very small; and the metathoracic epimera 
are largely developed, and conspicuous behind the side margins of the elytra. 
1. Tinotus cavicollis. (Tab. V. fig. 6.) 
Haud depressus, dense punctatus, brevissime pubescens, opacus, fusco-niger, antennarum basi, palpis pedibusque 
testaceis, abdominis apice ferrugineo; prothorace fortiter transverso, transversim convexo, dorso late pro- 
fundeque depresso, depressione magis evidenter pubescente. 
Long. 3 millim. 
Hab. GUATEMALA, near the city and at San Gerénimo (Champion). 
Antenne rather short and not thick, evidently thickened externally, third joint about 
as long as the second, fourth as long as broad, fifth scarcely, tenth distinctly trans- 
verse; terminal joint not elongate, scarcely so long as the two preceding joints together, 
obtusely acuminate. Head only about half as broad as the elytra, dull, obscurely 
punctate. Thorax quite twice as broad as long, curved at the sides, and narrowed in 
front, the base scarcely sinuate on each side, broadly and deeply depressed along the 
middle, very finely punctate, the pubescence in the depression more conspicuous than 
