62 PROCEEDINGS OF THE NATIONAL MUSEUM vol.89 



British Museum, for comparing specimens of United States species 

 with Bates' types, as well as for numerous previous favors; H. J. 

 Reinhard, Agricultural and Mechanical College of Texas; Milton 

 Sanderson and the authorities of the University of Kansas Ento- 

 mological Museum; Prof. E. C. Van Dyke, Dr. Abe Michelbacher, 

 Mont A. Cazier, and Edward Ross, of the University of California; 



0. L. Cartwright, of Clemson College; Mark Robinson, of Philadelphia, 

 Pa. ; Dr. W. Dwight Pierce, of the Los Angeles Museum ; Dr. Richard 

 E. Blackwelder and the American Museum of Natural History; and 

 Hugo Kahl, of the Carnegie Museum, Pittsburgh. The large series 

 of the several species from Lower California presented for study by 

 Ross and Michelbacher have been particularly valuable. I am 

 especially indebted to Dr. Chapin for many favors. He compared 

 specimens with the types of LeConte at Cambridge and the types of 

 Horn at Philadelphia. Mrs. Emma L. Henry has rendered valuable 

 clerical assistance in the preparation of the manuscript. 



A word concerning the procedure followed in the present paper: 

 In the account under each species are listed the total number of 

 individuals and the localities for all specimens examined; where a 

 species is distributed over a wide range, specific localities are not given 

 but only the approximate boundaries of such range, as evidenced 

 from the material at hand. The names of collectors are given in 

 parentheses, and the collections from whence the specimens came 

 and/or are at present housed are indicated by enclosure within brack- 

 ets. In the bibliography a note is given defining the nature and scope 

 of each article listed. 



In some places in the key use has been made of the genitalia char- 

 acters to separate species; this is necessitated by the fact that these 

 species exhibit such slight external differences that series of each must 

 be carefully compared to determine them correctly, while if the gen- 

 italia are used the specimens may be quickly and positively placed. 



KEY TO THE AMERICAN SUBGENERA OF PHYLLOPHAGA 



1. Tarsal claws of anterior and middle legs simple, neither cleft nor 



toothed (female unknown) (Mexico) Chirodines Bates 



Claws of all legs pectinate, cleft, or variouslj' toothed 2 



2. Claws of tarsi narrowly cleft, angle formed by cleft being acute 



at least in males; females frequently with cleft much more 



obtuse, rarely grading into almost a median tooth 3 



Claws toothed, pectinate or serrate, never cleft 4 



3. Tarsal segments densely to moderately pilose beneath, less ob- 



viously so in females (segments broadened in males of some 

 species) ; color usually light testaceous (Central America and 



United States) Chlaenobia Blanchard 



Tarsal segments at most very sparsely pilose beneath, segments 

 never broadened in either sex; color variable (North and South 

 America) Phy talus Erichson 



