CHRYSOMELID BEETLES, CHLAMISINAE — MONROS 455 



3. Large (more than 5 mm. in length) ; pronotal tubercles conical and very acute, 



distinctly separated from each other; elytral tubercles also well developed 



(central Brazil) erinaceus, new species 



Not so large (approximately 4 mm. in length), tubercles less developed. _ 4 



4. Longitudinal pronotal groove with fine longitudinal striolae, between which 



a few punctures can be seen with difficulty; elytral surface also with fine 

 and dense striolae with indistinct punctures between them (central, northern, 



and eastern Argentina; Montevideo) hispidulus hispidulus (Klug) 



Longitudinal pronotal groove with deep and close punctures, between which 

 there are some longitudinal fine striolae; elytral punctures very distinct; 

 elytral surface shagreened, only the tubercles and irregularities covered with 

 fine striolae (interior of Brazil) insolitus, new species 



CHLAMISUS SIMILLIMUS Monros 



Chlamisus simillimus Monr6s, Acta Zool. Lilloana, vol. 6, p. 179, 1948. 



This species is easy to identify because of its pygidium, which is of 

 a different sculpture from that of all other species of this group. 

 Only the holotype from Bolivia is known. 



CHLAMISUS HISPIDULUS (Klug)] 



This species was described from Montevideo, and it is the only one 

 of the genus so far known from Argentina, where it seems to be 

 rather common and of wide distribution. The material studied 

 enables me to separate it into two subspecies : 



CHLAMISUS HISPIDULUS HISPIDULUS (Klug) 



Chlamys hispidula Klug, Entomologische Monographieen, p. 86, 1824. — La- 

 CORDAIRE, Monographie des Coleopteres * * * Phytophages, vol. 2, p. 700, 

 1848.— BuRMEisTER, Stett. Ent. Zeit., vol. 38, p. 61, 1877. 



Chlamys cordovensis Jacoby, Proc. Zool. Soc. London, 1907, p. 158, pi. 14, fig. 7. 



This subspecies is well described in Klug's, Lacordaire's, and 

 Jacoby's works, and it does not seem necessary to repeat the descrip- 

 tion. The identity of Klug's and Jacoby's species is evident. 



C. hispidulus hispidulus occurs in two colors: cupreous, most 

 commonly, and metallic reddish (somewhat similar to some dull 

 specimens of Fulcidax cupreus or F. violaceus); apparently more 

 frequent in the northern part of the general area. 



This subspecies inhabits the greater part of central and northern 

 Argentina from Baradero in the south (examples cited by Burmeister) 

 to Jujuy and Misiones in the north. Toward the west it may be 

 found in Cordoba, where it intergrades with the other subspecies, 

 which inhabits dry areas. 



CHLAMISUS mSPIDULUS LLAJTAMAUCANUS, new subspecies 



This subspecies replaces C. hispidulus hispidulus in the dry parts of 

 the western general area of the species, and the specimens that may 

 be considered as more typical llajtamaucanus (corresponding to those 

 from La Rioja and Santiago del Estero) could easily be regarded as 



