No. 2370. BEETLES OF THE TRIBE T1LLINI—W0LC0TT. 279 



of apical portion fine and confused; intervals very feebly convex, 

 narrower than the punctures, and finely irregularly punctulate. 

 Meso- and metasternum with a few moderately coarse scattered punc- 

 tures; abdomen finely rather densely punctate. Length, 8.2 mm. 



Male. — Fifth ventral segment deeply, broadly arcuate-emarginate 

 at apex; sixth ventral broader than long, sides feebly sinuate, the 

 angles slightly produced, between which the apex is bisinuate-emar- 

 ginate, longitudinally carinate at middle and at the sides, that of the 

 middle extending to basal third, the lateral carinae nearly to the mid- 

 dle; fifth dorsal broadly and deeply incised at apex, narrower than 

 corresponding ventral; last dorsal narrower and longer than last 

 ventral, sides strongly oblique, rapidly narrowing to apex, the latter 

 prolonged and strongly furcate at apex. (Plate 43, figs. 24, 25.) 



Type locality. — Santa Rita Mountains, Arizona. 



Type. — In author's collection, No. 1110. 



Santa Rita Mountains, Arizona, 5,000-8,000 feet. Collected by 

 Mi*. E. G. Smyth and presented to me several years ago by Mi*. Warren 

 Knaus, to whom it gives me great pleasure to dedicate this very 

 distinct species. 



The very peculiar sexual characters separate this at once from any 

 known species in our fauna. It is closest allied to morosa, from which 

 it ma} r be readily distinguished by the sinuate-truncate elytra! 

 apices as well as the unique sexual characters. 



CYMATODERA MOROSA LeConte. 



Oracle, Arizona, July 8 to 10, 1898 (Hubbard and Schwarz); Cata- 

 lina Springs, Arizona, April 12, 1898 (Hubbard and Schwarz); Chiri- 

 cahua Mountains, Arizona, June 1, 1897 (H. G. Hubbard); Pine 

 Dale, Arizona, July 18; Williams, Arizona, July 1 (Schwarz and 

 Barber) ; Chaves, New Mexico, June 8 (Townsend) ; Alameda County, 

 California, August (A. Koebele). 



CYMATODERA UMBRINA Fall. 



Los Angeles County, California (Coquillett) ; Tuscon, Arizona, July 

 21 (Hubbard and Schwarz); Fort Grant, Arizona, July 23, 1897 

 (H. G. Hubbard) ; Oracle, Arizona, July 30 in Gylindropuntia, July 

 6, 7, 12 (Hubbard and Schwarz); Winslow, Arizona, July 31, 1901 

 (Schwarz and Barber); Hot Springs, Arizona, June 25, 1901; Wil- 

 liams, Arizona, June 10-July 29, 1901 (Schwarz and Barber); Pres- 

 cott, Arizona, June 19, 1901 (Schwarz and Barber); Mesilla, New 

 Mexico, May 5 (Cockerell); Deming, New Mexico, July 22 (E. A. 

 Schwarz). Seven males; twenty-five females. 



CYMATODERA BELFRAGEI Horn. 



Texas (Belfrage) ; San Antonia, Texas. Three females. 



