138 Mr. G. C. Champion's Revision of the 



4. Chauliognathus sodalis. 



Chauliognathus sodalis, Waterh., Trans. Ent. Soc. Lond. 



1878, p. 326; Gorh., Biol. Centr.-Am., Coleopt. iii, 



2, p. 69, pi. 5, figs. 8, 9 (?). 



^. Aedeagus : apical portion of the median lobe very broadly 



and obliquely produced ; lateral lobes stout, moderately long, the 



left lobe concave, broadly and obtusely dilated beyond the middle 



within, and \vith the short, curved, narrow apical portion hooked 



on the inner side at the tip, the right lobe shorter than the left, 



constricted on the dorsal aspect before the apex, the apex itself 



obtuse. Plate IV, figs. 8, 8a. 



Hob. Mexico, Oaxaca. 



There are three forms of this fine species : the form, 

 selected as typical by its describer, with the elytra wholly 

 ochreous (fig. 8 of Gorham) ; var. 1, with the apex of the 

 elytra broadly black; var. 2, similarly coloured, except 

 that the basally dilated black prothoracic median vitta 

 is extended on to the base of the elytra (fig. 9 of Gorham). 

 The antennae are long, dilated, compressed, and taper 

 towards the tip, very much as in the type of the genus 

 Daiphron, D. lyciforme. The narrow yellow " pygidial 

 plate " mentioned by Gorham is, of course, pecuHar to the 

 female. 



5. Chauliognathus tripartitus. 



Chauliognathus tripartitus, Chevr., Col. Mex., Cent, ii, 

 fasc. 5, no. 106; Gorh., Biol. Centr.-Am., Coleopt. iii, 

 2, pp. 71, 278, pi. 5, fig. 4 i^). 



Hah. Mexico; Guatemala; Panama. 



Var. a. Elytra with an ante-median fascia of variable width, 

 rarely interrupted at the suture, yellow. {^ $.) (Gorham's fig. 4.) 



Chauliognathus janus, Waterh., Trans. Ent. Soc. Lond. 

 1878, p. 329 (?); Gorh., loc. cit. p. 71. 



Hab. Mexico; Guatemala; Panama; Ecuador. 



Var. y3. Elytra as in a, but with the apex yellow. 



Chauliognathus tripartitus, Chevr., var., Waterh., loc. cit. 

 p. 327. 



Hab. Mexico; Guatemala. 



Var. 7. Elytra wholly black, (c^.) 



Hab. Mexico; Panama. 



