284 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



CYMATODERA OVIPENNIS LeConte. 



Los Gatos, California (A. Koebele) ; Martinez, California, December 

 2, 1882 (Turner) ; Sisson, California (A. Koebele) ; San Mateo County, 

 California, August (A. Koebele); Lake Tahoe, California, July 14 

 (II. G. Hubbard); Los Angeles, California (Coquillett) ; Santa Cruz 

 Mountains, California (A. Koebele) ; Placer County, California, Sep- 

 tember (A. Koebele) ; Siskiyou County, California (A. Koebele) ; 

 Nevada County, California, September 14, 1885 (A. Koebele); 

 Oregon (Hubbard and Schwarz). Six males; fifteen females. 



CYMATODERA ANGUSTATA Spinola. 



Los Angeles County, California (A. Koebele) ; Santa Cruz Moun- 

 tains, California (A. Koebele); Hood River, Oregon, May 19 (Hub- 

 bard and Schwarz). Two males; three females. 



PROVISIONAL TABLES OF THE NORTH AMERICAN SPECIES OF CYMATODERA GRAY. 



Table of groups. 



Antennae with joints two, three, and four short, subequal, each shorter than any of the 



succeeding joints Puncticollis group, p. 284. 



Antennae with joints two and three equal, small, together distinctly shorter than joint 



four, usually about two-thirds length of joint four Longicornis group, p. 285. 



Antennae with joints two and three unequal, together as long as joint four. 



Latefascia group, p. 285. 

 Antennae with joints two and three equal, together not, or but little, longer than joint 



four Usta group, p. 285. 



Antennae with joint two short, usually little if at all longer than half the length of 



joint three Xanti group, p. 286. 



Antennae with joints two to ten similar and nearly equal, joint eleven longer. 

 Body winged, base of elytra broader than base of thorax. 



Last ventral segment in both sexes smaller than the last dorsal, and never 



deeply emarginate in the males Bicolor group, p. 286. 



Last ventral segment broader than the last dorsal, the sides of the former 

 reflexed partly inclosing the latter. 



Elytral striae arranged in pairs, alternate intervals broader, sutural 



angle sometimes prolonged Hopei group, p. 286. 



Elytra striae equidistant Knausi-morosa group, p. 287. 



Last ventral segment broader than the last dorsal in the male, smaller 



than the last dorsal in the female Confusa group, p. 288. 



Body apterous, or at least with wings abortive; elytra at base little, or not at 

 all, wider than the thorax Angustata group, p. 288. 



SYNOPSES OF GROUPS. 



P UNCTICOLLIS group. 



Elytral intervals with rows of long, erect or suberect, coarse hairs. 



Intervals near suture equal to or narrower than the punctures; prothoracic 

 puncturing sparse and fine. 

 Antennal joints subcylindrical, joints five to ten very feebly incrassate 



apically puncticollis Bland. 



Antennal joints gradually incrassate apically, outer joints not at all 

 triangular. 



