NORTH AMERICAN COLEOPTERA. 13 



above detailed are abundantly sufficient to establish this genus as a 

 new group, related to the Geotrupidae and Copridje, with, however, 

 a strong tendency toward the Dynastide group of Scarabseidse pleu- 

 rosticti." 



Classification of the Coleoptera of North America, 1861, p. 128. 



Here the tribe Pleoconiini is defined and placed after the Geotru- 

 pini. 



Nunquam Otiosus, vol. il, >870. 



Dr. L. W. Schaufiiss describes two new species of Pleocoma. 



Trans. Am. Ent. Soc. v, 1874, pp. 81-84. 



Dr. LeConte gives a table of the species known to him, describes 

 one new, renames one of those described by .Schaufuss and describes 

 the females of two of the species. Sketches of the antennne are 

 given not very accurately drawn. 



Following this paj)er is a description of the larva of Pleocoma by 

 Baron R. Osten-Sacken. 



Classification of the Coleoptera of North America, 1883, p. 244. 



This work is a revised edition of that mentioned above, in which 

 it was my privilege to be associated with Di-. LeConte in authoi'ship. 

 The genus Pleocoma occupies the same position as in the former 

 work. 



In reviewing the work of Dr. LeConte there will be seen a very 

 consistent evolution of opinion based on more and better material, 

 but from the first he has insisted on the evident relationship of Pleo- 

 coma with the Geotrupini. As early as 1861 all reference to any 

 Dynastide affinity diappeared from his writings, having continued 

 from 1856 to 1859, in what was the period of extremely j)oor and 

 limited juaterial for study. 



Without wishing to anticipate I may here state that the opinion 

 published by us in the " Classification" of 1883 was not adopted 

 without a careful study of the comparatively abundant material then 

 before us. 



Stettiner Entomologische Zeitung, 1883, pp. 436-450. 



Dr. Gerstaecker })ublishes, under the title, " On the position of the 

 genus Pleocoma Lee. in the Lamellicorn system" a lengthy article, 

 full of interesting information, in which he deduces results calculated 

 to destroy our faith in tlie analytical power of Dr. LeConte, but — 

 the deductions are not warranted by the actual facts of the case. 



