18 PECTINICOENIA. 



strength of a specimen in La Ferte's collection said to be from that country. No 

 example is contained in the large Mexican collections of M. Salle and Herr Hoge. 

 Kaup's description differs much from those of Percheron and Truqui. 



9 PHORONEUS. 

 Phoroneus, Kaup, Monogr. der Passal. p. 100. 



Five species are enumerated by Kaup, viz. four from Brazil and one from Peru. 



l. Phoroneus jansoni. (Tab. I. figg. 17, 17 a.) 



Elongatus, convexus, vix planatus ; clypeo triflexuoso, medio paullo producto ibique obtuse bidentato, denteque 

 parvo utrinque supra labri marginem, mox pone dentes linea impressa ; tuberculo verticis parum elevato, 

 apice haud libero ; carinis frontalibus brevibus, acutis, lsevibus, longe ante clypeum terminatis ; tborace 

 angulis anticis productis, sulculo marginali omnino lsevi antiee intns dilatato, lateribus lsevibus ; elytris 

 fortiter punctato-striatis, interstitiis subconvexis, 6°-9 m paullo angustioribus, omnino glabris ; metasterno 

 disco planato, lateribus vitta depressa sed omnino impunctato ; prosterno lateribus et tibiis parce birsutis, 

 his unidenticulatis. 



Long. 32 millim. 



Hal. Ntcaeagua, Chontales (Belt, Janson). 



This species has the same facies and proportions as Undulifer incisus, but is not very 

 closely allied to it generically. In the flattened disc (with sharp postero-lateral edges) 

 of the metasternum it belongs to the Neleus group, in which its entirely smooth meso- 

 and metasternum and sides of elytra give it generic distinction. Undulifer belongs to 

 a group of genera, with long antennal leaflets, in which the " metasternum " is evenly 

 convex, and the anterior angles of the thorax rounded instead of advanced, and more or 

 less acute, as in Neleus and allies. Although the slightly arcuated middle part of the 

 clypeus shows some approach to the singular form of the same member in Undulifer, 

 the absence of spines in the latter constitutes a fundamental difference. 



UNDULIFER. 



Undulifer, Kaup, Monogr. der Passal. p. 103. 

 The following is the only recorded species. 



I. Undulifer incisus. 



Passalus incisus, Truqui, Eev. & Mag. Zool. 1857, p. 266. 

 Undulifer incisus, Kaup, loc. cit. p. 104. 



Eab. Mexico, Parada, Oaxaca (SalU), Cordova {Hoge). 



