Mexican and Central American ChauUogna.thinae. 1G7 



Hab. Mexico, Play a Vicente and Cordova in Vera 

 Cruz. 



Var. /3. Elytra with an anteriorly dilated sutural stripe, and the 

 margins from a little below the base to near the apex, these markings 

 sometimes becoming coalescent beyond the middle, infuscate or 

 black (the dark bands thus leaving an oblique stripe extending 

 downward from the shoulder, and a spot at the apex, ochreous). 



Chauliognathus obliquus, Gorh., loc. cit. p. 281, pi. 12, 

 fig. 15 (?). 

 Hab. Mexico (Mws. Oxon.), Cerro de Palmas [Plumas] 

 in Vera Cruz. 



Var. y. Elytra black, with about the apical third ochreous; 

 prothorax infuscate along the middle of the anterior margin ; femora 

 in part testaceous. ($.) 



Hab. Costa Rica {Mus. Brit.). 



Var. 5. Elytra black, each with a small ochreous apical spot; 

 the legs and a spot on the disc of the prothorax also black. ( (J. ) 



Chauliognathus apicalis, Gorh., loc. cit. p. 75 ((^). 

 Hab. Mexico, Vera Cruz ; Guatemala, Vera Paz. 



^. Aedeagus : median lobe obliquely bent ; left lateral lobe 

 extremely elongate, sinuous, slightly hooked at the tip; right 

 lateral lobe one-half shorter than the left, compressed, narrowed 

 towards the apex. Plate VIII, figs. 43, 43a. 



The numerous examples of this variable insect now 

 available for examination (including an interesting series 

 from Mexico in the Oxford Museum) connect the various 

 forms named by Gorham, so that there can be no doubt 

 as to their specific identity. He selected the form with 

 entirely ochreous elytra as the type of C. nigriceps. The 

 var. y is represented by a single example ($), 8 {apicalis) 

 by three males, and a and /3 by long series ((^$). The 

 legs vary in colour from almost wholly testaceous to black, 

 but the under surface of the body is always in great part 

 flavous. The elytra are greatly abbreviated, leaving the 

 blackish wings and part of the abdomen exposed. C. 

 nigriceps comes very near C. histrio (which is a form of 

 C. lituratus with abbreviated elytra), but the system of 

 coloration of the elytra is constantly different in the darker 



