282 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



Longula is a larger, more parallel species, with nearly cylindrical 

 prothorax, and there are several other differences, perhaps the most 

 conspicuous of these being that in rudis the elytral punctures change 

 abruptly in size at posterior edge of the fascia, while in longula there 

 is no such sudden change, the large punctures continuing well toward 

 the apices. 



CYMATODERA COMANS Wolcott. 



Mesilla Park, New Mexico (C. N. Ainslie) ; San Simon, Arizona, 

 July 5, 1897 (H. G. Hubbard). One male; two females. 



CYMATODERA FUSCULA LeConte. 



Catalina Springs, Arizona, April 10, 12, 1898, on Prosopis juliflora 

 (Hubbard and Schwarz) ; Tucson, Arizona, January 5 (H. G. Hub- 

 bard). One male; two females. 



CYMATODERA FUSCULA, var. TEXANA Gorham. 



Dimmit County, Texas (F. G. Schaupp) ; Burnett County, Texas 

 (Schaupp); Texas (Belfrage). Two males; eight females; three 

 indeterminate. 



This variety only differs from the typical form by possessing a 

 pale ante apical spot on each elytron. 



CYMATODERA UNDULATA Say. 



Plummer Island, Maryland, September 2, 1911 (in freshet drift), 

 September 8, 1904, October 30, 1912 (Schwarz and Barber) ; Bladens- 

 burg, Maryland, August 10 (Hubbard and Schwarz); Washington, 

 District of Columbia, August (Hubbard and Schwarz) ; New York 

 (J. B. Smith); Marietta, Ohio (Hubbard and Schwarz); Ohio (Hub- 

 bard and Schwarz) ; Evansville, Indiana (H. Soltau) ; Middlesboro, 

 Kentucky, August 28, 1904 (H. S. Barber) ; Kirkwood, Missouri, 

 October 20, 1896 (bred from stems of Bidens bipinnata) (M. Murt- 

 feldt); Missouri; Texas (Belfrage). Four males; eighteen females. 



CYMATODERA CONFUSA, new species. 



Color, markings, and general form similar to balteata, but with 

 elytra much broader at base. Sparsely, finely pubescent; body 

 winged. Head large, coarsely, closely, somewhat rugosely punctate; 

 eyes moderately prominent; antennae extending to basal fifth of 

 elytra, structure as in balteata. Prothorax twice as long as wide at 

 apex, moderately constricted at apical third, rather strongly con- 

 stricted behind the middle, narrower at base than apex; ante-scutellar 

 impression distinct; surface coarsely, deeply punctate, slightly 

 variable in regard to density but usually close, rarely sparse. Elytra 

 one-third wider than prothorax at base, three times as long as wide 

 at base; humeri distinct; sides subparallel, very slightly divergent 

 posteriorly; apices separately rounded; rows of punctures coarse in 



