PSAMMODIUS. 103 



This genus has a somewhat wider range than Physsemus. Equally with that genus 

 spread over the eastern hemisphere, it occurs, though in species of diminished size, 

 throughout Tropical America. Upwards of thirty species have been described. 



1. Psammodius quinque-plicatus. 



Psammodius 5-plicatus, Horn, Trans. Am. Ent. Soc. 1871, p. 292 \ 

 Hob. North America, Arizona K — Mexico, Northern Sonora (Morrison). 



2. Psammodius culminatus. 



P. quinque-plicato similis, sed differt thoracis rugis elevatis granulatis. Anguste oblongo-ovatus, nitidus ; capite 

 verrucoso, vertice lasvi ; clypeo sat anguste emarginato, extus rotundato ; thorace toto granulato, sed nitido, 

 utrinque sulcis quinque (nee medium nee latera attingentibus), 1° juxta marginem anticum, 4° magis 

 obliquo et curvato, linea dorsali late impressa; elytris sat acute punctulato-striatis, interstitiis medio 

 culminato-oonvexis et (praecipue versus latera et apicem) subtiliter granulatis ; tarsis posticis articulo 1° 

 brevi, sat late triangulari. 



Long. 3| millim. 



Eab. Mexico, Presidio (Forrer), Jalapa, Mexico city (Edge). 



Two examples from Jalapa and Mexico city are pitchy-black ; the others are 

 reddish-testaceous like P. quinque-plicatus. 



3. Psammodius veraBcrucis. 



P. ccelato (Lee.) proxime afflnis, sed elytris multo minus ventricosis ; valde convexus, rufo-testaceus, glaber ; 

 capite minus grosse verrucoso, occipite lsevi, clypeo triangulariter emarginato, extas angulato ; thorace 

 utrinque lineis transversis quinque grossissime punctatis quarum duobus solum latis et profundis, dorso 

 anteriore lsevi, posteriore grossissime confuse punctato ; elytris acute exarato-striatis, striis fundo punctatis, 

 interstitiis supra planis. 



Long. 2|-2f millim. 



Hob. Mexico, Vera Cruz, Tapachula in Chiapas (Edge). 



Allied to the Californian P. ccelatus, Lee, but the elytra, though very convex, not 

 ventricose as in that species. The very coarse sculpture of the thorax is similar, but 

 there are tolerably distinct rows of punctures between the transverse sulci, the elevated 

 parts being quite smooth in both species. The sculpture of the elytra differs from 

 that of P. ccelatus only in the striae being much deeper. 



Resembles also the P. quinque-plicatus, Horn, but the elytra are more ovate and the 

 thorax has not the five equally impressed sulci of that species. 



Herr Hoge obtained a very large series of examples at Vera Cruz, which offer scarcely 

 any individual variation. Two examples also were captured at Tapachula on the 

 Pacific slope. 



4. Psammodius micros. 



Brevis, sat anguste oblongus, nigro-piceus, politus ; capite verrucoso, vertice laavissimo, clypeo sat profunde 

 angulatim emarginato ; thorace pauciter grosse punctato, sulco utrinque profunde punctato, prope marginem 



