28 



LAMELLICOENTA. 



very pale testaceous. In well-developed examples the thorax has a strong golden- 

 brassy tinge. 



C. moniliatus may be distinguished from the nearly-allied C. sexspilotus, Guerin, and 

 other neighbouring species, by the fine but sharply impressed elytral strise, in which are 

 small and distinct but distant punctures. The variety is labelled in the Salle collection 

 " C. cyanocephalus, Har., type." It was probably named so by Von Harold on being 

 communicated to him after his Monograph was published, as no mention is made of the 

 specimen, nor is the locality Nicaragua given by him under C. cyanocephalus, which is 

 stated to be from " Cayenne, Orinoco, and Guiana." The Nicaraguan insect does not 

 correspond at all with Harold's description. 



6. Canthon femoralis. (Tab. II. fig. 7.) 



Coprobius femoralis, Chevr. Col. Mex. Cent. i. no. 74 (1834) l . 

 Canthon femoralis, Harold, Berl. ent. Zeitschr. 1868, p. 62 2 . 

 Canthon ochropus, Harold, Col. Hefte, i. p. 79 (1867) . 



Hah. Mexico x 2 , Cordova, Santecomapan, Teapa (Salle), Juquila, Tapachula in 

 Chiapas (Hbge) ; Beitish Hondueas, River Sarstoon (Blancaneauoc) ; Guatemala, 

 Coban, Zapote, Mirandilla (Champion); Costa Rica 2 . 



Belongs to a numerous group of the genus, not indicated in Von Harold's Monograph, 

 in which the robust hinder tibiae are straight on their inner side and strongly arcuated 

 on their outer edge ; generally also they are thickened and calf-like. I find that the 

 sexual difference in the pygidium is the same as described by Von Harold in C. angus- 

 tatus, this segment being remarkably short and convex ; but the male anterior tibise are 

 broad and tridentate (with broad and notched apical spur), and not elongated and 

 bidentate as in O. angustatus. An example from Juquila is figured. 



7. Canthon angustatus. (Tab. II. fig. 4.) 



Canthon angustatus, Harold, Col. Hefte, i. p. 79 (<?) ; Berl. ent. Zeitschr. 1868, p. 63 (<J ? )\ 

 Hob. Nicaeagua, Chontales (Belt, Janson); Costa Rica 1 .— South Ameeica, Colombia 1 . 



8. Canthon euryscelis. (Tab. II. fig. 6.) 



Breviter ovatus, supra (prjecipne thorace) convexus, politus, niger, interdum capite et apice castaneis ; clypeo 

 bidentato; thorace medio utrinque angulato et antice arcuato denticulatoque ; elytris lsevibus ; tihiis 

 4 posticis latissimis, subcompressis, extus valde arcuatis, vix bicarinatis nee inter carinas sulcatis pro- 

 sterno transversim carinato ; pygidio nitido. 

 tf . Tibias anticse late, dentibus validis tribus approximatis, calcare apicali apice valde furcato ; pygidio convexo. 

 5 . Tibia? sicut in tf , sed calcari apicale acutissimo ; pygidio sat elongato, vix convexo. 

 Long. 4^-5 1 millim. 



Hob. Mexico, Cordova, Playa Vicente, Oaxaca (Salle); Guatemala (coll Bates); 

 Panama, Bugaba (Champion). 



Belongs to the same group as C. femoralis, C. angustatus, C. nitidicollis, C. semiopacus, 



