278 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



CYMATODERA BICOLOR Say. 



Mountain Lake, Virginia (H. Ulke); Afton, Virginia (Hubbard 

 and Schwarz); Oakland, Maryland, July 11 (Hubbard and Schwarz); 

 Plummer Island, Maryland, June 7, 1906; May 19, 1912 (Schwarz 

 and Barber); Buffalo, New York (C. V. Riley); New York (J. B. 

 Smith) ; Pennsylvania (Melsheimer in Hubbard and Schwarz col- 

 lection) ; Detroit, Michigan, June (Hubbard and Schwarz) ; Michi- 

 gan; Canada (J. B. Smith); Kansas. 



In occasional specimens of this species, especially from Michigan, 

 Canada, and the north, the prothorax is entirely black with the excep- 

 tion of the prosternum anterior to the coxae. Eight males ; thirteen 

 females; two with damaged abdomen. 



CYMATODERA INORNATA Say. 



Plummer Island, Maryland, July 12, 19, 1905 (D. H. Clemmens 

 and E. A. Schwarz); Long Island, New York (M. L. Linell); Penn- 

 sylvania (J. B. Smith); Detroit, Michigan, June (Hubbard and 

 Schwarz); Missouri (Barlow). Four males; six females; two inde- 

 terminate, abdomen defective. 



CYMATODERA CALIFORNICA Horn. 



Reddington, Arizona (W. Barnes) ; Los Angeles County, California 

 (D. W. Coquillett); San Bernardino Mountains, California (C. C. 

 Zeus); California (Belfrage). One male; four females. 



CYMATODERA HORNI Wolcott. 



Santa Catalina Mountains, Arizona. One female. 



CYMATODERA KNAUSI, new species. 



Moderately elongate, feebly shining, pale reddish brown, a narrow 

 irregular rather indistinct median elytral fascia paler, moderately 

 clothed with rather long erect, and semi-recumbent pale yellowish 

 hairs. Antennae slender, longer than head and thorax; joint two 

 slightly shorter than joint three; three to ten subequal in length, 

 elongate, feebly serrate; eleventh one-half longer than the tenth. 

 Head moderately densely not very coarsely punctate; eyes feebly 

 prominent. Thorax subcylindrical, one-fourth longer than wide at 

 apex; base slightly narrower than apex; sides feebly constricted 

 subapically, more strongly compressed behind the middle; ante- 

 scutellar impression distinct; surface moderately coarsely not densely 

 punctate. Elytra three times as long as thorax, much wider at 

 base than thorax at widest part; humeri distinct; sides nearl}- parallel ; 

 apices sinuate-truncate; disk convex; each elytron with ten rows 

 of coarse quadrate punctures, the first lateral row extending to 

 slightly behind the middle, the three sutural to the middle, the re- 

 maining rows longer and obliterated at apical fourth, the punctures 



