104 LAMELLICOKNIA. 



anticum alteraque breviore posteriore, basi marginato lineaque abbreviata dorsali : elytris catenulato- 

 striatis, interstitiis planis, subtiliter rugulosis, intus vix crenatis. 

 Long. 2 millim. 



Hal. Guatemala, Capetillo, Duenas {Champion). 



Closely allied to the South-European P. salulosus, Muls. Tt has the same general 

 form and colour, and structure of legs, and also a similar sculpture of the head and 

 thorax ; but it is very much smaller ; the vertex for a wide space is perfectly smooth 

 and polished ; the punctures of the thorax are smaller and more widely spaced ; and 

 the punctures of the elytra are confined to the bottom of the neatly-ploughed striae, 

 scarcely crenating the sides of the interstices. 



5. Psammodius parvulus. 



Psammodius parvulus, Chevr. Ann. Soc. Ent. Fr. 1864, p. 415 \ 



Eal. Mexico, Presidio (Forrer) ; Guatemala, Duenas, Paraiso (Champion). — South 

 Ameeica, Amazons ; Antilles, Cuba 1 . 



Very closely allied to P. micros. Smaller (1-| millim.) ; colour reddish-testaceous, the 

 head and thorax castaneous with paler margins, and the latter having one lateral trans- 

 verse groove only. In the identification there is a difficulty in the phrase used by 

 Chevrolat, " elytris striato-punctatis," as this does not accurately express the sharply 

 catenulate-punctate striae. 



6. Psammodius integer. 



Oblongus, convexus, glaber, nitidus, castaneus ; capite lato, verrucoso, occipite lsevissimo ; clypeo late et minus 

 profunde triangulariter emarginato, utrinque angulato, acuto ; tborace sat magno, lateribus arcuatis, 

 postice magis quam antice angustato, angulis posticis nullis, supra mediocriter punctato, punctis minutis- 

 simis intermixtis, sulcis transversis nullis foveaque sola prope angulos anticos, lateribus medio sublsevibus, 

 convexis ; elytris fortiter crenato-striatis ; carina mesosterni elongata. 



Long. 2 1 millim. 



Hab. Mexico, Vera Cruz (Edge). 



This species connects Atcenius with Psammodius. It differs entirely from the former 

 by its robust broad hind tibiae (subserrate and setose along their outer edge and not 

 prolonged into a spine at the outer apex), by their robust spurs (which, however, are 

 obtusely pointed at their apices rather than spatulated),and by the short tarsi, in which 

 the basal joint is very much broader than the others. On the other hand, the head 

 aDd thorax are constructed as in the second section of Atcenius, the latter showing no 

 trace of the transverse furrows of Psammodius except a well-marked and large fovea 

 near the anterior angles. 



