270 NEOTROPICAL PSELAPHIDAE 



5. Last stemite ogival, very long, nearly as long as wide 



Dalmoburis brevicoUis 



Last stemite transversely fusiform with apical margin nearly straight, 



much wider than long Dalmoburis petrunkevitchii 



I have keyed brevicoUis Sharp in both Bythinophysis and Dalmoburis until 

 the type can be studied, although the latter genus appears to be a more suitable 

 vehicle. The species of Dalmoburis may be listed as follows: 



brevicoUis (Sharp). 1887. Coatepeque, 1300 feet, Guatemala; Cordoba, 

 Vera Cruz, Mexico; Penuela, Vera Cruz, Mexico; Huichihuyan, San 

 Louis Potosi, Mexico. 



petrunkevitchii new species. Panama Canal Zone. Genotype. 



BATRIPHYSIS new genus 



This new genus is distinct from other Tychini on the following combination 

 of characters: (1) Head subquadrate with simple, eleven-segmented antennae 

 widely separated at base on the antero-lateral corners of the front; eyes reni- 

 form, not prominent, placed far below the convex, longitudinally medianly cari- 

 nate vertex; (2) Vertexal foveae absent; (3) Maxillary palpi simple, four- 

 segmented, moderately slender and elongate; (4) Integuments of dorsal and 

 ventral surfaces roughtly punctate to granular; (5) Pronotum lacking lateral 

 longitudinal sulci and lacking lateral foveae, but with a long transverse ante- 

 basal sulcus; (6) Elytra lacking basal foveae, sutural stria vestigial, but each 

 elytron with an entire, longitudinal carina on the flank; (7) Six sternites in the 

 male sex (female sex unknown) ; (8) Five visible tergites, the first three later- 

 ally margined each side; (9) Posterior coxae moderately separated by a distance 

 equal to one-third the metastemal length; (10) Tarsi with a large, broad, acute 

 primary claw and a much shorter, narrow accessory claw. 



Batriphysis epicranis new species 



Type Male. 1.6 mm. long x 0.6 mm. wide. 



Light reddish-brown ; punctation heavy as described below ; the pubescence 

 moderately abundant and subappressed ; body elongate-cylindrical as in Dalmo- 

 physis, the habitus batrisoid. 



Head subquadrate, slightly wider through the eyes than long; tempora 

 short, one- fourth the head length, strongly arcuate, and only slightly longer than 

 the eyes. Eyes appear very small from above (0.05 mm. long x 0.02 mm. wide) 

 but in reality elongate-reniform, with a dorso-ventral depth of 0.1 mm. placed 

 far below vertex, on the sides of head, and composed of about 32 small facets. 

 Occipital margin subtruncate. Vertex high, convex, coarsely granulate, with an 

 entire, high, median, longitudinal carina from occiput to a point just apical of 

 anterior eye margin; here this median vertexal carina bifurcates and becomes 

 vestigial and interrupted. Vertexal foveae absent, their homologues present as 

 a pair of circular tumuli with blackened periphery, each elevation fonned by 



