208 NEOTROPICAL PSELAPHIDAE 



ceding two united, about as wide as tenth, subacute apex, rounded base, dorsal 

 face sinuate, ventral face evenly convex. 



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

 elongate, arcuate, basally slender, widest at distal three-fourths, narrowing 

 at distal fourth; third elongate, shorter than second, pedunculate at base, 

 swelling from distal three-fourths to apex, and about as wide as second; fourth 

 much wider than third but shorter than second, external face slightly, evenly 

 convex, internal face strongly arcuate-convex to blunted apex. No palpal cone 

 discernible. 



Pronotum with a sharp, obliquely dorsal spine (0.1 mm. long) arising 

 from a swelling at middle of each lateral margin; a broad, rather poorly de- 

 fined longitudinal sulcus mesial to each spine, from the anterior fourth to the 

 basal bead; disc with a still broader and less well-defined median longitudinal 

 sulcus from apical third to basal bead; a narrower, more clearly defined 

 biarcuate transverse subbasal sulcus from side to side ; the longitudinal median 

 sulcus and the transverse sulcus divide the disc into four tumidities, a sub- 

 oblong apical pair and a subquadrate basal pair. 



Elytra with sloping humeri, each humerus armed with a sharp, erect 

 spine; each elytron obliquely subplicate from base of humeral spine; each 

 elytron with two vestigial foveae beneath a strong transverse basal bead and 

 a poorly-defined sutural stria which is not entire, extending to apical six- 

 sevenths where it ends abruptly in a foveaform depression. 



Abdomen with five visible tergites of which the first is nearly as long as 

 second and third united, these latter subequal; fourth longer than third; fifth 

 longer than fourth, as long as first, longitudinally slightly tumid in middle. 

 Lateral abdominal margins carinoid. Six visible sternites of which the first is 

 seen as an oblong, depressed plate between the mesial ends of the posterior 

 coxae, about half as long as the latter; second longest; third, fourth, and fifth 

 subequal; sixth (last) longer than fifth. Sternites simple and convex. 



Metastemum medianly tumid, this tumid area flattened. 



Anterior coxae subcontiguous, narrowly separated by a prosternal lamina. 

 Intermediate coxae approximate, their cavities confluent at the level of the 

 sterna. Posterior coxae very widely separated. 



Femora long and slender. Anterior femora gradually swollen at middle; 

 intermediate more definitely swollen at apical three- fourths; posterior still 

 more abruptly swollen at apical three-fourths. 



Anterior tibiae thick, slightly contorted, with a long glabrous sulcoid 

 scar on antero-ventral face for basal half, the upper margin of the scar 

 strongly carinated. Intermediate and posterior tibiae long and slender. 



Tarsi of usual pattern with two very unequal tarsal claws. 



Described from a single female specimen, collected from a log on July 

 25, 1938, at Villavicencio, Meta, Colombia by Dr. Charles H. Seevers for 

 whom the species is named. 



This species has no close relatives. It is the only species of the genus 

 known north of Brazil and structurally is best contrasted with trabeculatus 

 of about the same size from Amazonas. 



