60 APTERORRHINUS. 



crassioribus , scapo breviore , articnlis medianis lineato- 

 trausversis ; prothorace sub-ovato , antice utrinque stran- 

 gulato , lateribus profuude scrobiculatis ; elytris brevioribus 

 et latioribus , apici minus marginatis , dorso sulcato-scrobi- 

 culatis, scrobiculis subrotuudatis, interstitiislongitudinalibus 

 magis undiilatis, feinoribus et tibiis brevioribus et latioribus, 

 tarsis itidem brevioribus, crassioribus, articulo uuguifero 

 fortiter compresso ; coxis anticis magis separatis. 



A genere Rhinopteryce Lac. distinguitur capite vix bre- 

 viore, oculis et angulis posticis raagis prominentibus , rostri 

 parte basali baud conica, parte antica baud marginato- 

 dilatata, illa lateribus subparallelis et ante antennas rapide 

 fortiterque coarctata, hac simplici , angustiore quam postica, 

 cylindrica, apicem versus depressiuscula et vix dilatata; 

 antennis crassioribus, articulis funiculi, ut dixi, lineato- 

 transversis, 9° et 10" latioribus sed brevioribus; protho- 

 race latiore , utrinque magis scrobiculato ; elytris basi tri- 

 tuberculatis , sulcis latioribus , interstitiis longitudinalibus 

 angustioribus, magis elevatis ac undulatis , interstitiis trans- 

 versis magis depressis; femoribus tertio apicali dentatis, 

 tarsorum articulo unguifero lateribus compresso ; coxis an- 

 ticis magis separatis. 



Apterorrhinus m. must be placed between Hormocerus 

 Scbh. and Rhinopteryx Lac. being a transitional genus. It 

 may be characterized as follows: 



Body moderately elongate, robust, scaled. Head trans- 

 verse, notched at the base with the external angles promi- 

 nent , like tubercles , farrowed above ; basal portion of the 

 rostrum short, hardly longer than the head, stout, paral- 

 lel at the sides, strongly contracted before the antennal 

 portion ; apical part longer than the preceding one , narrower, 

 curved, cylindrical, moderately enlarged at the tip. 

 Antennae short and robust, with the median joints 

 strongly transverse, the O'^^ and lO^h longer, the apical one 

 ovato-conical. Prothorax ovate, strangulate at the sides 

 anteriorly, depressed above, deeply furrowed in the middle, 

 scrobiculate laterally. Elytra almost parallel at the sides, 



Notes from the Leyden Museum, Vol. XVII. 



