TRANSACTIONS 



OF THE 



AMERICAN ENTOMOLOGICAL SOCIETY 



VOL U NIK XV. 



Review of the specie!^ of* FIjEOI'O.HA, with a disciissioii 

 of* its syiitteiuatie position iu the ^icarabteidte. 



BY GEORGE H. HORN, M.D. 



The recent publication of a translation of Dr. Gerstaecker's elab- 

 orate discussion of Pleoconia, in the " Entomologica Americana," 

 brings the matter now very fairly and prominently before those who 

 are unable to read it in the original. 



It has been my desire to reply to the article, which diametrically 

 opposes the views of Dr. LeConte, and to which I am made a co- 

 respondent, willingly, I admit, by virtue of my association in the 

 second edition of the " Classification." 



At the 2:)resent time there are three undescribed species in mv 

 cabinet, these give the opportunity for a review and comparison of 

 all those now known. The feiiiales of three species have been studied, 

 two were known to LeConte, one of which lacked the important an- 

 tennse. Two of the females belong to the four-lamellate males and 

 <me to the seven lamellate. 



The larva described by Baron Osten-Sacken as that of Pleocoma 

 has been placed beyond controversy as the true larva by the argu- 

 ments of Dr. Gerstaecker in the contrary direction. 



We have, therefore, the history of Pleocoma far more complete 

 than of many genera of which the species are more numerous and 

 individuals more abundant. 



TRANS. AMER. ENT. SOC. XV. ( 1 ) JANUARY, 1888. 



