22 PROCEEDINGS OP THE NATIONAL MUSEUM vol.70 



14. OEDIONYCHIS TENUILINEATA Horn 



Fig. 15 



Oedionychis tenuilineata Hokn, Trans. Amer. Ent. Soc., vol. 16, 1889, p. 186. 



Broadly oblong, slightly convex, moderately shining, yellow brown, 

 pronotum indistinctly spotted, elytra with two narrow vittae and 

 common sutural vitta, these often with a purplish or greenish luster. 

 Antennae half as long as body, rather coarse, first joint broadly 

 dilated and sparsely pubescent, third and fourth joints equal, first 

 three joints and terminal joint paler. Head broad, reddish brown, 

 coarsely punctate except on middle of occiput; median depression 

 indistinct, interocular space half as wide as head. Pronotum nearly 

 three times as wide as long, almost rectangular, slightly narrowed 

 anteriorly, with broad explanate margin, very faintly punctate; 

 small, somewhat indeterminate, pale reddish brown spots across 

 pronotum, not forming a distinct fascia. Scutellum black. Elytra 

 broad, oblong, slightly convex, with small rounded humeral promi- 

 nences and narrow margin, finely punctate, surface 'shining; a 

 common, narrow sutural vitta extending to apex, a narrow median 

 vitta on each elytron not quite reaching apex, and a narrow sub- 

 marginal vitta starting from the humeral prominence and nearly but 

 not quite uniting with sutural vitta at apex, these vittae frequently 

 with a purplish or greenish luster. Body beneath reddish brown, 

 pubescent, epipleura pale. 



Length. — 5.5 to 7 mm. ; width, 2.8 to 3.8 mm. 



Type locality. — Southern Arizona. 



Distribution. — Arizona. 



According to Horn, the last antennal joint in the female is entirely 

 pale, whereas in the male only the tip of the last joint is pale. This 

 species is readily distinguished from Oe. petaurista by its flatter 

 prothorax with wide explanate margin and without the hea^^ fascia 

 or median blotch so characteristic of petauHsta. The elytral vittae 

 as a rule are very narrow, although in some specimens they are as 

 broad as in petaurista. 



15. OEDIONYCHIS PETAURISTA (Fabricius) 



Figs. 16, 17 



Oalleruca petaurista Fabricius, Syst. Eleuth., vol. 1, 1801, p. 495. 



Altica petaurista Olivier, Ent., vol. 6, 1808, p. 674. 



Oedionychis petaurista Crotch, Proe. Acad. Philadelphia, vol. 25, 1873, p. 62. — 



Harold, Deutsche Ent. Zeitschr., vol. 25, 1881, p. 150. — Horn, Trans. Amer. 



Ent. Soc, vol. 16, 1889, p. 185. 



Broadly oval, convex, moderately shining, yellow brown with 

 reddish brown head, pronotum with a piceous median spot or band, 

 elytra with a common sutural vitta and median and submarginal 



