CANTHON. — DELTOCHILITM. 35 



28. Canthon ateuchiceps. 



C. deyrollei affinis, sed multo minor, prosterno subtus hand carinato, etc. Lsete viridi-seneus, nitidus, sparsim 

 punctulatus ; capite sat magno, clypeo antiee nigro-cupreo, subtiliter scabroso-punctato, sex-dentato, den- 

 tibus 4 medianis late triangularibus ; thorace medio late rotundato, margine laterali antiee parum arcuato, 

 regione scutellari depresso; elytris band profnnde punctulato-striatis ; pygidio (J) mediocriter convexo, 

 sparsim pnnctulato : tibiis anticis gradatim dilatatis, posticis snbrectis et unicalcaratis. 



Long. 6 millim. 



Eab. Mexico, Acapulco (Hbge). 



PSEUDOCANTHON. 



A gen. Oanthone differt mesosterno sat elongato, sntura anteriore tamen recta. Oculi supra majores. Tibiae 

 anticse 6 intus sinuatse. Pygidio subdeflexo. 



The considerably longer mesosternum of Canthon perplems, on which this genus is 

 founded, separates it not only from Canthon, but from the group of genera to which 

 Canthon belongs. The other peculiarities which distinguish the species have already been 

 pointed out by Von Harold. The form of the four hinder tibiae and tarsi and the pro- 

 portionate length of the joints of the latter show a nearer relationship to Canthon than 

 to the Upilissus and Epirhinus group ; but it seems to form a step in the direction of 

 Chceridium rather than to form part of either group. 



1. Pseudocanthon perplexus. 



Canthon perplexus,lieconte,Jovim. Acad. Phil. ser. 1, ii. p.85 1 ; Horn, Trans. Am. Ent. Soc. 1870, 

 pp. 44 & 46 2 ; Harold, Berl. ent. Zeitschr. 1868, p. 67 3 . 

 Hal. North America 1 2 s . — Mexico, San Juan Bautista in Tabasco (Hoge) ; Guate- 

 mala, Paso Antonio (Champion) ; Nicaragua, Chontales (Janson). — South America, 

 Amazons (coll. Bates). 



DELTOCHTLUM. 



BeltocMlum, Eschscholtz, Entomogr. p. 37 (1822) • Natnrwiss. Abhandl. ans Dorpat, i. p. 93 (1823) ; 



Lacordaire, Gen. Col. iii. p. 79. 

 Hyboma, Lepeletier de Saint-Eargeau & Serville, Encycl. Meth., Ins. x. p. 352 (1825). 



Like the preceding genera, peculiar to America, of which continent it constitutes 

 one of the most remarkable and characteristic insect, forms. One species extends to 

 temperate latitudes in North America, and two others to the banks of the Plata ; but 

 the great majority are confined to the central parts of the tropical zone. Thirty-eight 

 species have been described. 



1. Deltochilum parile. (Tab. II. fig. 14, c? .) 



D. furcato affine, sed mnlto minor, nigro-cserulens, supra fere opaens ; clypeo sequaliter ocellato-pnnctulato, 

 dentibns approximatis utrinque fere rotundato ; thorace medio utrinque vis angulato, supra a?quali discrete 



FF 2 



