684 STAPHYLINIDZ. 
Hab. Mexico (Truqut, in coll. Sharp). 
Above blackish, with the margin of the clypeus, the base of the thorax, and the hind 
margins of the rings of the hind body reddish, the elytra piceous; beneath piceous. 
Thorax straight at the sides, not quite so long as broad, the hind angles rectangular ; 
without fovea, and the punctuation very distant and excessively fine. The elytra are 
only about as long as the thorax, and almost impunctate. Hind body very shining, 
almost impunctate, both above and below. Unique. 
5. Holotrochus centralis. 
Subcylindricus, nigerrimus, nitidus ; parcius subtilissime punctulatus ; antennis pedibusque rufis ; elytris obso- 
lete substrigosulis ; abdomine segmento ultimo ventrale granulato, 
Long. 44 millim. 
Hab. Guaremata, San Juan in Vera Paz (Champion) ; Ntcaraeua, Chontales (Janson). 
The thorax is about as long as broad, straight at the sides; without impression, 
sparingly, extremely finely punctate. Elytra without punctuation, very indistinctly 
strigulose. The two terminal abdominal segments punctate ; the last ventral segment 
distinctly granulate. Three examples. 
This insect is no doubt closely allied to H. cylindrus, Er. 
6. Holotrochus uniformis. 
Subcylindricus, nigerrimus, nitidissimus ; omnino tenuissime punctulatus, fere glaber; antennis pedibusque 
rufis. . 
Long. 4 millim. 
Hab. Panama, Bugaba (Champion). 
Joints 4-6 of the antennze small, 7-10 each strongly transverse. Thorax nearly as 
long as broad, very convex transversely, without fovee. Elytra a little longer than 
the thorax, polished and shining. Hind body without sculpture ; hind margin of the 
penultimate segment and the armature red ; terminal segment reddish beneath, without 
sculpture. Unique. 
7. Holotrochus marginatus, (Tab. XVIII. fig. 6.) 
Minus cylindricus, nigerrimus, nitidissimus; parcius subtilissime punctulatus ; antennis, pedibus anoque rufis ; 
prothorace transverso, basi subtiliter marginato. 
Long. 34 millim. 
Hab. Guaremaa, Cerro Zunil 4000 to 5000 feet (Champion). 
This species is easily distinguished from the preceding by the shorter thorax, and by 
this part possessing a distinct basal margin. The thorax is much broader than long, 
almost impunctate, without impressions, slightly curvate at the sides, the hind angles 
rounded. Elytra rather longer than the thorax, shining, almost impunctate. Terminal 
segments of the hind body almost destitute of sculpture, shining both above and below. 
Two examples. 
