Mexican and Central American Chauliognathinae. 143 



(which is similarly shaped in all the forms) is characteristic 

 of the present species. This character at once separates 

 C. distinguendus from similarly coloured examples of C. 

 limbicoUis, which, moreover, is a much smaller insect. 



10. Chauliognathus profundus. 



Chauliognathus profundus, Lee, Proc. Acad. Phil. 1858, 



p. 71 {nee Crotch, Horn, Gorham). 

 Chauliognathus togatus, var., Gorh., Biol. Centr.-Am., 



Coleopt. iii, 2, p. 278 (1885). 

 Chauliognathus ineptus, Horn, Trans. Am. Ent. Soc. xii, 



p. 150 (1885). 



Var. o. Elytra with a common transverse fascia, or a spot on the 

 disc of each, at about the apical third, or a transverse scutellar 

 patch at the base, black ; the three transversely placed black spots 

 on the disc of the prothorax sometimes united into a large patch. 



Chauliognathus togatus, var., Waterh., Trans. Ent. Soc. 



Lond. 1878, p. 327. 

 Chauliognathus togatus, Gorh., loc. cit. pp. 71, 278, pi. 5, 



figs. 10, 11. 



Var. j3. Elytra wholly rufo -fulvous. 



Chauliognathus togatus, type, Waterh., loc. cit. p. 326 ; 

 Gorh., loc. cit. pp. 71, 278. 



(J. Aedeagus : median lobe large, strongly curved, produced at 

 the apex into a very broad spoon-shaped process; left lateral lobe 

 long, broad, concave, subangularly dilated on the dorsal aspect 

 towards the tip, the latter feebly hooked; right lateral lobe much 

 shorter and narrower than the left, compressed, obliquely bent 

 outward from about the middle, the tip rounded. Plate VI, figs. 

 15, 15a. 



Hab. North America, Arizona; Mexico, Sonora, Chi- 

 huahua, Durango, Guanajuato, Michoacan, Morelos, 

 Guerrero, Oaxaca. 



Two species, each with about the apical third of the 

 elytra black, were confused by Leconte under the name 

 C. profundus — one, the type, from Sonora, with the head 

 black, the other, from Arizona [described in Trans. Am. 

 Ent. Soc. ix, p. 43 (1881)], with the head red. The first- 

 mentioned is not rare on the table-lands of Mexico, but 

 the typical form of it is scarce, two examples only (from 



