78 NEOTROPICAL PSELAPHIDAE 



Lateral pronotal margins with five teeth ; first antennal segment three 

 times as long as second, or as long as III to VII inclusive, funicle 

 minute, moniliform, abruptly narrower than IX; IX and X three 



times larger than VIII bicolor 



(1.8 mm.; Alpine Bolivia) 



The two species crassicornis Raffray and rubripennis Raffray are said to 

 closely resemble putzeysi (Schaufuss) of Uruguay, but differ from this species 

 in antennal structure, much thicker and shorter antennae, and much stronger 

 pronotal teeth. 



Group IV 



Second Section, new 



This section of the genus has (a) each elytron with four basal foveae, 

 (b) lateral pronotal margins with six strong teeth, (c) rounded tempora, (d) 

 antennae with segments III to VI as long as wide and VII and VIII slightly 

 transverse. At the present time it includes one species: 



Eurhexius zonalis new species 



Male Holotype. Measurements in millimeters: 



Head 0.24 (median) or 0.3 (through tempora) x 0.44 wide, through eyes; 

 cervicum 0.06 x 0.21; antennae 0.73 total; segment I 0.13, II 0.06, III to VIII 

 inclusive 0.24, club 0.28, XI only 0.13; pronotum 0.5 x 0.53, the spines from 

 0.03 to 0.01; elytra 0.5 (at suture) x 0.67; abdomen total 1.0, first tergite 

 0.3 X 0.77, second 0.2, third 0.2, fourth 0.16, fifth 0.13; sternites first 0.13, 

 second 0.2, third 0.13, fourth 0.11, fifth 0.03, sixth 0.16. Total length 2.31 x 0.77 

 greatest width. (PI. VIII.) 



Reddish brown uniformly, integuments very shining; lightly but sub- 

 asperately and diffusely punctate with the following exceptions: the anterior 

 sixth of the pronotum and the basal marginal area are coarsely, deeply punctate 

 and the antennal prominence on each side of the head is very coarsely and 

 cribrately punctate while the cervicum is lightly alutaceous. 



Head transverse, the eyes small but prominent and composed of about 28 

 small but prominent facets, the eyes not quite as long as tempora. Tempora 

 prominent and rounded. Vertexal foveae two, large, circular, nude, on a line 

 passing through the middle of eyes, widely separated, one being behind each 

 antennal prominence, connected by an entire, broadly arcuate sulcus. Occiput 

 medianly sulcate to just beyond vertexal foveae, with a short, conical, obtuse 

 but prominent spine on each side of this longitudinal sulcus at the occipital 

 margin of the head. Head dorso-ventrally flattened, the ventral surface very 

 broad, flat, glabrous, densely pubescent with long, non-capitate setae. These 

 setae are very long (0.13 to 0.18 mm.) in contrast to the body pubescence 

 (0.08 to 0.12 mm.). Medianly, the glabrous ventral surface has a very large 

 circular deep gular fovea at base, and a strong median carina from this fovea to 



