202 NEOTROPICAL PSELAPHIDAE 



oval fossa with sharply defined edges, and general shape of the segments of 

 the maxillary palpi. It differs from Decarthron in the anatomy of the head. 

 The head is transversely square from a dorsal view, with the front abruptly 

 truncate between the bases of the antennae; the front is separated from the 

 epistomal region by a deep, transverse sulcus (this sulcus is about as deep as 

 half of the eye length, and therefore conspicuous) on the anterior end of 

 the head below the level of the basal antennal segments ; laterally this frontal 

 sulcus continues along each side of the head, incorporating the antennal 

 acetabulum, and extending posteriorly over each gena to end near the occipital 

 margin beneath the posterior margin of the eye; this posterior portion of the 

 circumcephalic sulcus is filled with pubescence which by its appearance sug- 

 gests some secretory or sensory function. 



Antennae with segment I as wide as tenth, subquadrate, medianly and 

 transversely creased or impressed; II narrower than first, cylindrical, three 

 times as long as wide ; III obconic ; IV-VI ovate ; VII-VIII transverse, slightly 

 produced or subacuminate on mesial face; IX subquadrate, transverse, sub- 

 equal to width of eighth; X (last) ovate with a very truncate base. 



laticeps Raffray. 1904. Brazil. 



GLOBA (Raffray, 1887) 



This genus is restricted so far to South America. It is highly specialized 

 in that the abdomen is exceptionally short, convex, declivous, rounded apically, 

 with the abdominal "margin" formed by a single thin carina. In this char- 

 acter Globa departs from the majority of Staphylinidae, from the Euplectini 

 and on the other hand, approaches the Batrisini. 



Antennae eleven-segmented, stout, generally simple in construction, with 

 a three-segmented club. 



Maxillary palpi four-segmented, first segment minute; second elongate, 

 slender save for the usual apical inflation; third very small, transversely tri- 

 angular as usual; fourth largest, oval, slightly flattened, acuminate with a 

 palpal cone. 



Ventral surface of the head tricarinate, a median straight carina and a 

 sinuous lateral carina each side, all three longitudinal. 



Pronotum cordiform, simple. 



Elytra subglobular, without basal foveae, and neither a sutural nor a 

 dorsal stria on either elytron. 



Abdomen previously noted, the first tergite much longer than second or 

 third; fourth and fifth longer than third, and diversely armed or irregular 

 in the male. sex; fifth tergite not visible from above. Six sternites, of which 

 the first is visible beneath the metasternum, and the sixth is semicircular to 

 invest the ventral margin of the fifth tergite. 



Middle coxae distant; posterior coxae distant. 



The three species may be separated as follows: 



