II. — Coleopferological Notices. 

 I. 



BY THOMAS L. CASEY. 



Read October 7, 18S9. 



The following pages embody the results of a number of detached 

 studies in various parts of the Coleopterous series, and are confined, 

 in general, to the fauna of America north of Mexico. The family 

 Phalacridte, and the genera Thinobius, Aploderus, and Limnichus 

 are treated monographically. 



I have to acknowledge my appreciation of the kindness shown 

 me by the authorities of the Museum of Comparative Zoology, 

 at Cambridge, Mass., under the curatorship of Dr. H. A'. Hagen, 

 for permission to examine the types of Dr. LeConte, without 

 which no systematic work of scientific value could have been accom- 

 plished. 



I am also indebted to Prof. C. Y. Riley for the use of the 

 material of the National Museum, which has been of great service 

 in determining geographical distribution in the Phalacridse, and to 

 Dr. D. Sharp, and Messrs. E. A. Schwarz, Otto Lugger, and H. F. 

 Wickham, for valuable specimens. 



New York, September 29, 1889. 



Note. 



The introduction of new names for parts of an insect, when names already 

 in use will serve just as well, should be avoided, and, as the term hypomera has 

 been employed by me in many descriptions for the inflexed sides of either the 

 pronotum or elytra, by prefixing the proper adjective, it may be objected that 

 ejiipleurai would serve the same purpose, and that the new word is therefore 

 unnecessary. I have consequently determined to restrict the meaning of hypo- 

 mera, so as to denote simply the inflexed sides of the pronotum, reserving the 

 word epipleurce to denote the inflexed sides of the elytra, and the word hyjw- 



