346 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. VII. 



disk feebly convex, with rows of fine, well separated punctures which 

 become very fine and feebly impressed posteriorly and are obliterated 

 at apical fifth; intervals very feebly convex, three times as wide as 

 rows of punctures. Metasternum and abdomen feebly, sparsely punc- 

 tate. Length 5.8 millim. 



Male. Fifth ventral segment broadly feebly emarginate; sixth 

 much shorter and narrower than last dorsal, broadly and very deeply 

 sinuately emarginate at apex. Last dorsal nearly as long as broad, 

 arcuately truncate, broadly, feebly incised at middle of apex. (PI. VI, 



fig- 7-) ' 



Allied by antennal structure to usta and antennata, but the form 

 is more slender, the color much paler, the rows of elytral punctures 

 finer, the second and third joints of antennae proportionately shorter, 

 and the terminal segments of the abdomen are of a different form. 



St. George, Utah. July. One specimen. Collected and loaned 

 the author for study by Prof. Wickham. Named in memory of my 

 mother. 



Cymatodera peninsularis Schaeffer. (PI. V, fig. i.) 



Cymatodera peninsularis Schaef., Jour. N. Y. Ent. Soc., xn, 1904, 



p. 214. 



A specimen of this oddly marked species was sent to the writer by 

 the late Dr. F. H. Snow, by whom it was taken in the Baboquivaria 

 Mountains, Arizona. 



The specimen is a male and differs from the type as described by 

 having the head and prothorax entirely pale, the antennas, knees, and 

 tarsi slightly darker. The type of this species was taken at San 

 Felipe, Lower California. It is described as having the "thorax as 

 long as broad" and the elytral "apices separately rounded"; in the 

 Arizona specimen the thorax is slightly longer than broad and the 

 elytral apices are nearly conjointly rounded, the sutural angles being 

 only minutely rounded. The secondary sexual characters of the 

 male are the same as those given for that sex by Mr. Schaeffer. The 

 figure given represents the Arizona specimen. 



Cymatodera usta LeConte. 



Cymatodera usta Lee., Proc. Acad. Nat. Sci., Phila., 1858, p. 71. 



Twenty-nine years ago Dr. George H. Horn 1 referred usta Lee. 

 to the synonymy, remarking "does not differ from C. cylindricollis 

 Chevr., from Mexico." The accuracy of this assignment has never 



1 Transactions Amer. Ent. Soc., vm, 1880, p. 149. 



