No. 2370. BEETLES OF THE TRIBE TILLIN1 -WOLCOTT. 289 



sixth ventral is very short and arcuately emarginate at apex in 

 soror, in antennata the same segment is much longer and scarcely 

 emarginate, the last dorsal is much longer and more broadly truncate 

 than in soror. 



Oymaiodera brevicollis Shaeffer, 2 described from a single female 

 specimen from Arizona, I have been unable to place in the table of 

 species. It is unknown to me in nature, and the characters given 

 in the original description give no hint as to what position it should 

 be given. It closely resembles ovipennis LeConte, but can not be 

 associated with that species as it is fully winged. Mr. Schaefl'er 

 gives as other distinguishing characters the longer antenna! joints, 

 shorter pro thorax, and the more narrowly rounded apices of elytra. 

 Mr. Shaeffer, in a letter, says that this species should be placed 

 preceding the angustata group. 



Cymatodera pilosella LeConte is merely a small form of ovipennis 

 possessing no distinctive characters so far as I can perceive other 

 than that of size. Hence it is not included in the table. 



2 Journ. N. Y. Ent. Soc., vol. 2-"-, 1917, p. 130. 



27177— 21— Proc.N.M.vol.59 19 



