No. 2370. BEETLES OF THE TRIBE TILLINI—WOLCOTT. 277 



hind the middle, the narrower elytral intervals, and the sexual char- 

 acters of the male will serve to distinguish this species from isabellae 

 and the allied usta. 



CYMATODERA SIRPATA Horn. 



San Diego, Texas, May 1 to 25, 1895 (E. A. Schwarz); Victoria, 

 Texas, April 8 (E. A. Schwarz). Six males; three females; one de- 

 fective. 



The emargination of the male fifth ventral segment is somewhat 

 variable, sometimes very feeble indeed, again very distinct, but never 

 very deep, and always broad. The sixth ventral is said by Horn to 

 be " deeply longitudinally sulcate at middle." This I find is not a 

 constant character, only one specimen out of a series of six well- 

 preserved males has a median sulcation and in this it extends ob- 

 liquely, showing that this is due to shrinkage. (Plate 43, fig. 20.) 



In sirpata female the fifth ventral is truncate, the sixth distinctly 

 smaller (even at base) than the last dorsal; last dorsal more nearly 

 semicircular than in var. spatiosa. (Plate 43, fig. 21.) 



CYMATODERA SIRPATA, variety SPATIOSA, new variety. 



Differs from the typical form as follows: Form broader, elytra 

 more depressed, the intervals rather finely, moderately closely, irreg- 

 ularly punctate (a single row of rather coarser punctures in sirpata). 



The sexual characters of the male and female are sufficiently dis- 

 tinct to render the separation of the variety easily possible. 



Male. — Fifth ventral segment truncate; sixth short, rounded, as 

 broad at base as last dorsal, veiy feebly, sub triangularly emarginate 

 at apex; last dorsal longer than last ventral, semicircular, very 

 feebly emarginate- truncate at tip. (Plate 43, fig. 22.) 



Female. — Fifth ventral truncate; sixth large, nearly semicircular, 

 broader at base and but little shorter than last dorsal; last dorsal 

 broad, obtusely rounded at apex. (Plate 43, fig. 23.) 



Type locality. — Texas. 



Four par •aty 'pes. —Cat. No. 23123, U.S.N.M. 



Described from five specimens, two males (one in my collection, 

 No. 55) and three females. The males are without precise locality, 

 being labeled "Tex.," at least one of them having been collected by 

 Belfrage. One of the females is labeled "Tex./' collection J. B. 

 Smith, and may have been collected by Schaupp. The other females 

 are from San Diego, Texas, May 19, 1895 (E. A. Schwarz), and Vic 

 toria, Texas, May 25 (E. A. Schwarz). 



CYMATODERA TUTA Wolcott. 



San Simon, Arizona, July 5, 1897 (H. G. Hubbard) ; Oracle, 

 Arizona, July 9, 1898 (Hubbard and Schwarz); San Augustine 

 (near Las Cruces), New Mexico,, August 28 (C. H. T. Townsend). 

 Two males; one female. 



