282 NEOTROPICAL PSELAPHIDAE 



sided furrow. Anterior to this line (which passes well beyond eyes, skirting the 

 vertexal declivity and ending each side in the lateral incisure), the front is di- 

 vided by two longitudinal depressions into three areas: a lateral tumidity above 

 each antennal base, and a median elevation which posteriorly bifurcates into a 

 pair of teeth. These median, sharp teeth lie just opposite the median vertexal 

 excavation, and therefore are framed by the larger vertexal cusps. As in pana- 

 maensis, I could not discern vertexal foveae. The inter-antennal area just de- 

 scribed is perfectly semicircular in outline, and ventrally merges with the 

 clypeus in a simple vertical descent. Labrum simple. Ventral surface of the head 

 perfectly simple and unmodified. 



Maxillary palpi as described for genus. 



Antennae eleven-segmented, distant, normal; segment I elongate-oval, half 

 as long as eleventh but longer than any other segment; II nearly as wide and 

 half as long as first, quadrate; III-VII small, third obconical, others moniliform; 

 VIII and IX subpyramidal, increasingly transverse, the ninth about as wide as 

 second; X is asymmetrically trapezoidal, wider than first; XI as in panama- 

 ensis. 



Pronotum as in Dalmonexus. 



Elytra as in panamaensis. 



Wings present. 



Abdomen with five visible tergites in a length ratio of 1.5/.6/.6/1/.6 and 

 with margins as in panamaensis. Six sternites in a length ratio of .6/1.4/.3/ 

 .4/.5/1 with first stemite visible from side to side and with the usual pubescent 

 fovea between posterior coxae. 



Posterior coxae approximate, separated by a distance equal to one-fourth 

 the median metasternal length. Intermediate and posterior coxae each armed 

 with a long translucent spine on the ventral face. Tarsi as described for genus. 



Described on a single male collected by the author on July 28, 1936, from 

 log mold at Zetek 17 on Barro Colorado Island, Gatun Lake, Panama Canal 

 Zone, and named in honor of Dr. John R. Bowman in recognition of the labor 

 involved in bringing the descriptions of North American pselaphids between 

 two covers. 



Bowmani is congeneric with panamaensis but is quickly separated by the 

 simple male antennae, wholly different head and more narrowly separated pos- 

 terior coxae. It is possible that additional information will cause us to place 

 these two species in a new genus because of the lack of vertexal foveae per se. 



The species of Batrybraxis may be listed as follows: 



bowmani new species. Panama Canal Zone. 



curtula Reitter. 1882. Blumenau, Sao Paulo, Brazil. Genotype. 



jortis Reitter. 1882. Sao Paulo, Brazil. 



infiexa Schaufuss. 1887. Mexico. 



longipennis (Raffray). 1890. Tovar Colony, Venezuela. {Batrisus: 

 Arthmius) 



panamaensis new species. Panama Canal Zone. 



punctipennis Reitter. 1882. Petropolis, Brazil. 



