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



2. Elytra black fasciated with testaceous, or 



testaceous fasciated with black (fig. 14 of 



Gorham) bifasciatus. 



3. Elytra testaceous maculated with black along 



the suture anteriorly inapicalis. 



4. Elytra testaceous, with a common anterior 



fascia and an isolated ante-apical mark 



black trimaculatus. 



5. Elytra entirely black nigripennis. 



These definitions scarcely include the common form 

 with about the apical third of the elytra black, or the 

 one (from Cuernavaca) with a broad transverse black 

 patch on the disc below the base. A male of each form 

 has been dissected, showing no variation in the structure 

 of the aedeagus, and the accurate specific diagnosis of the 

 author. 



2. Chauliognathus corvinus. (Plate III, figs. 5, (^, 6, 9-) 

 (^. Chaidiognathys corvinus, Gorh., Biol. Centr.-Am., 



Coleopt. iii, 2, p. 281. 

 $. Telephorns {Chauliognathus ?) haereticus, Gorh., loc. cit. 

 p. 289. 



(J. Head large, broad; antennae moderately long, rather stout, 

 slightly tapering towards the tip ; prothorax subquadrate, usually 

 with a very broad median vitta, and sometimes a small spot on 

 each side of it, black ; elytra rapidly narrowing posteriorly, varjdng 

 from wholly black or fuscous to ochraceous with the tip more or 

 less infuscate, rarely fuscous with the sutural and outer margins 

 flavescent; legs usually black, rarely in part testaceous. 



$. Head small; antennae shorter, the intermediate joints 

 broadly widened, rapidly tapering towards tlie tip; prothorax 

 broader, transverse, more rounded at the sides, usually with a large 

 subtriangular, dark patch on the disc ; elytra broader, often dilated 

 towards the middle, nigro -fuscous, fuscous, or fusco-testaceous, the 

 sutural and outer margins often yellow; femora and tibiae testa- 

 ceous, the tarsi infuscate. 



cJ. Aedeagus : median lobe obliquely bent ; left lateral lobe ex- 

 tremely elongate, slender, bisinuate, feebly hooked at the tip; 

 right lateral lobe very short, compressed, produced into a rather 

 long, narrow, curved hook at the apex. Plate IV, figs. 6, 6a. 



Hab. Guatemala, San Isidro ; Nicaragua ; Costa Kica ; 

 Panama. 

 A common insect in Chiriqm. There can be no doubt 



