172 H. C. FALL. 



Grande and Lower California. A single species only — gibbosum — 

 was known to LeConte, nor did a second appear till after the publi- 

 cation of the Second Supplement to the Henshaw List. In 1890 

 Casey described cristata, referring it to Ptinodes ; a not very serious 

 error, as the two genera are separated on rather trifling differences 

 and may yet have to be united. In 1894 Horn added sordida 

 (Texas) and sellata (Lower California); and in 1903 Schaeffer de- 

 scribed texana and pulehella, both from the vicinity of Brownsville, 

 Texas. Two more species are described in the present paper, one of 

 these known to many of the eastern collectors, most of whom have 

 assumed it to be a form of gibbosa; the other a small species brought 

 by Mr. Beyer from Lower California. Our eight species separate 

 quite readily as follows : 



Prothorax with sides more or less sinuate posteriorly 3. 



Prothorax with sides not sinuate posteriorly 2. 



2. Elytral vestiture rather sparse, not concealing the surface ; humerus and hasal 



margin, a small median and a subapical spot on each elytron, white; 

 form very robust (California) 1. cristata. 



Elytral vestiture more abundant but not dense, luteo-cinereous, hairs of tho- 

 racic and elytral tufts uniformly blackish brown (Pennsylvania and 

 Kentucky) 2. klagesi. 



Elytral vestiture relatively dense, especially in a broad whitish submedian 

 fascia; hairs of thoracic and elytral tufts in part fulvous (Eastern 

 United States) 3. gibbosa. 



Elytra with a common antemedian circular subdenuded spot (Lower Califor- 

 nia) 4. beyeri. 



3. Punctures of elytra distinctly serial in arrangement 4. 



Punctures of elytra extremely confused throughout. • • 5. 



4. Elytra densely clothed with whitish pubescence, except in apical fourth; an- 



terior transverse line of elytral tufts completely obsolete (Texas). 



5. texana. 

 Elytra with dark irregular discal space which contrasts strongly with the 



dense white vestiture of adjacent portions; anterior and posterior 

 transverse series of elytral tufts distinct (Lower California). 



6. sellata. 

 Elytral vestiture relatively sparse, each elytron with numerous tufts of short 



dark brown hair arranged in three longitudinal lines (Texas). 



7. sordida. 



5. Elytral vestiture pale brown, a narrow zigzag median transverse line and the 



apex pale; each with two discal tufts, one subbasal, the other at apical 

 third (Texas) 8. pulehella. 



In the following diagnoses I have drawn freely upon the descrip- 

 tions of Horn and Schaeffer, contenting myself with such additions 

 and modifications as seemed necessary to insure uniformity of treat- 

 ment. 



