No. 2370. BEETLES OF THE TRIBE T1LLINI—WOLCOTT. 281 



CYMATODERA RUDIS, new species. 



Form very similar to that of ovipennis, but a littlo more slender 

 and the elytra somewhat wider at base. Subopaque, conspicuously 

 clothed with long, coarse, pale yellowish hairs; pale brown to piceous 

 brown, head, prothorax, and mesosternum darker, labium, palpi, and 

 antennae pale; elytra with a broad, vaguely limited, oblique median 

 fascia yellowish- testaceous; abdomen yellow. Head coarsely very 

 densely, front more finely very sparsely punctate; eyes moderately 

 prominent; antennae very slightly longer than head and thorax, joints 

 two to ten subequal in length, joints five to ten moderately serrate, 

 joint eleven nearly one-half longer than joint ten, obtuse at apex. 

 Prothorax twice as long as wide at apex, feebly constricted at apical 

 third, rather strongly compressed behind the middle; base distinctly 

 narrower than apex; ante-scutellar impression moderately distinct 

 with surface broadly but feebly elevated each side; surface coarsely, 

 deeply, densely punctate, more finely less deeply in apical third. 

 Elytra at base less than one-half wider than thorax at apex; sides 

 strongly divergent to about apical fourth; apices conjointly rounded; 

 punctures coarse, rounded, perforate, closely placed, behind the 

 median fascia suddenly becoming much finer and more distant ex- 

 tending without perceptible change in size to the extreme apex 

 where they are somewhat confused; intervals much narrower than 

 the punctures in basal half, wider in apical half, each with a single 

 row of moderately fine punctures. Body beneath clothed with long 

 coarse hairs; meso- and metasternum coarsely punctate, the former 

 densely, the latter sparsely at sides but more finely and densely at 

 middle; abdomen feebly, coarsely, sparsely punctate, the fourth and 

 fifth segments very finely, very densely punctate and densely clothed 

 with fine, short, yellowish pubescence. Legs conspicuously clothed 

 with short and long coarse hairs. Length, 5-8 mm. 



Male. — Fifth ventral segment broad, subparabolically emarginate; 

 sixth ventral wider and subequal in length to last dorsal, obtusely 

 rounded at apex, middle of the apex narrowly but distinctly emar- 

 ginate; last dorsal elongate, obtusely rounded at apex. 



Female. — Fifth ventral segment with a small distinct U-shaped 

 emargination at apex; sixth ventral short, rounded, wider and but 

 slightly shorter than last dorsal, the latter nearly semicircular. 



Type locality. — Catalina Springs, Arizona. 



Type, allotype, and Jive paratopes. — Cat. No. 23125, U.S.N.M. 



Described from seven specimens from Catalina Springs (Gibbon's 

 ranch, 2,800 feet altitude), Arizona, three males April 8, 22, 30 and 

 four females April 7, 30, 1898 (Hubbard and Schwarz). 



Very closely allied to the preceding species by the sexual charac- 

 ters of the abdomen in the male; there is, however, a slight but con- 

 stant difference in the form of the last dorsal in the two species. 



