PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued imii^ vl 0?K ^y '^* 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 



Vol. 101 Washington: 1950 No. 3271 



A REVISION OF THE BEETLES OF THE GENUS 

 MYOCHROUS 



By Doris Holmes Blake 



The name Myochrous (^^s mouse+xpwM«) color) appears first in 

 the DeJean Catalogue of 1837 (p. 438) , with three specific names listed, 

 all nomina nuda. In 1846, in the d'Orbigny Dictionary, the genus 

 was mentioned, but it still remained a nomen nudum. Chevrolat 

 stated that two of the three species listed were from Cayenne and one 

 from the United States. In 1847 Erichson ^ adopted the name from 

 DeJean's Catalogue and described a single species from Peru {Myo- 

 chrous invmundus) , thereby validating the genus and fixing the type. 

 In 1851 Blanchard^ described four species from Chile, and in 1864 

 Philippi ^ two more from the same country. In 1856 Jacquelin 

 DuVal ^ placed a Fabrician species {Gryptocephalus dubius) , probably 

 from St. Croix, in the genus. In 1858 Boheman ^ described a species 

 collected on the voyage of the Eugenia at Rio de Janeiro, which he 

 named M. denticollis^ a name that had already been used by Say for a 

 species of Colaspis from Missouri, which LeConte in 1859 assigned to 

 Myochrous. Baly,*' in 1865, in "an attempt at the classification of the 

 Eumolpidae," gave a description of the subfamily Myochroini with a 

 table of the genera, in which he included Dictyneis^ Myochrous, Glyp- 

 toscelis^ Pachnephorus.^ and Eryxia. To Dictyneis^ a genus described 



1 Archiv fur Naturg., vol. 8, p. 164, 1847. 



*7n Gay, Historia fisica y poli'tica de Chile . . ., vol. 5, pp. 544-546, 1851. 



» Stett. Ent. Zcit, vol. 25, pp. 389-390, 1864. 



* In Ram6n de la Sagra, Historia flslca, politica y natural de la Isla de Cuba (Spanish 

 ed.), vol. 7, pt. 2, pp. 124-125, 1856. 



* Kongliga Svenska Fiegatten Eugenics Resa . . ., Insects, p. 616, 1858. 

 « Jouru. Ent, vol. 2, pp. 433-436, 1865. 



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WV s 1 1954 



