210 NEOTROPICAL PSELAPHIDAE 



medianly strongly and minutely granulate; second and seventh not granulate. 

 Third and fourth slightly medianly depressed. Sixth deeply excavated medianly 

 to form a large circular glabrous fossa with sloping sides, the stemite is strongly 

 minutely granulate about this fossa and has each lateral-posterior angle pro- 

 duced into a wide, arcuate, truncate horn. Seventh composed of two separate 

 plates, a right and a left piece which meet medianly to give the stemite an 

 elongate-triangular outline with rounded apex. 



Metastemum medianly tumid, this tumid area slightly depressed, the 

 depression gradually deepening posteriorly to broadly separate each side into 

 two simple swellings which are neither tuberculate-compressed (as in gladi- 

 ator), nor subcarinated (as in hamatus). 



Coxae as in seeversi. Femora swollen, but not as abruptly as in seeversi. 

 Tibiae as in seeversi save that the scar of anterior tibiae is longer, occupying 

 nearly two-thirds of tibial length. Tarsi as in seeversi. 



Described from a single male specimen from Corumba, Matto Grosso, 

 Brazil. The only close relatives would seem to be two Brazilian species, 

 gladiator and hamatus from both of which it differs in male metastemum, 

 antennae and other morphological features. 



The species of Metopioxys may be listed as follows: 



gladiator Reitter. 1885. Blumenau, Brazil. Genotype. 



bellicosus (Westwood). 1856. Brazil. (Metopias) 



gallardoi Bruch. 1917. Buenos Aires, Argentina, con Solenopsis rich- 



teri Forel. cf. Bmch, 1929. 

 hamatus Raffray. 1896. Cavallo Cocho, Amazonas, Brazil. 

 longipennis (Schaufuss). 1872. Santarem, Brazil. {Metopias) 

 mattogrossoensis new species. Matto Grosso, Brazil. 

 reichei (Schaufuss). 1872. Iquitos, Brazil. (Metopias) 

 seeversi new species. Villavicencio, Meta, Colombia. 

 spiculatu^ (Schaufuss). 1886. Amazonas, Brazil. 

 subcarinatus (Schaufuss). 1872. Santarem, Brazil. 

 trabeculatus (Schaufuss). 1872. Amazonas, Brazil. 

 tricuspidatus Raffray. 1896. Iquitos, Amazonas, Brazil. 



BARROMETOPIA new genus 



Metopiini having (1) long, bristling, erect pubescence recurved distally; 

 (2) eyes reduced in size and number of facets; (3) tempora long, four times 

 the eye length; (4) vertex trisulcate between the eyes and the prominent, T- 

 shaped antennal tubercle, and with two nude, posteriorly-placed vertexal fo- 

 veae; (5) eleven-segmented, subcontiguous, strongly geniculated antennae in 

 which the first segment is nearly as long as the other ten segments united, the 

 second segment about twice the length of the third segment and a club formed 

 of the last three segments; (6) short maxillary palpi of four segments; (7) 

 pronotum with a median longitudinal sulcus but no lateral longitudinal sulci 

 and no transverse sulcus; lateral margins not spinose; (8) elytra with humeri 



